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authorRoger Frank <rfrank@pglaf.org>2025-10-14 19:55:54 -0700
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+ The Project Gutenberg eBook of The Wailing Octopus, by John Blaine.
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+<pre>
+
+The Project Gutenberg EBook of The Wailing Octopus, by Harold Leland Goodwin
+
+This eBook is for the use of anyone anywhere at no cost and with
+almost no restrictions whatsoever. You may copy it, give it away or
+re-use it under the terms of the Project Gutenberg License included
+with this eBook or online at www.gutenberg.org
+
+
+Title: The Wailing Octopus
+
+Author: Harold Leland Goodwin
+
+Release Date: March 3, 2010 [EBook #31495]
+
+Language: English
+
+Character set encoding: ISO-8859-1
+
+*** START OF THIS PROJECT GUTENBERG EBOOK THE WAILING OCTOPUS ***
+
+
+
+
+Produced by Greg Weeks, Mary Meehan and the Online
+Distributed Proofreading Team at https://www.pgdp.net
+
+
+
+
+
+
+</pre>
+
+
+<div class="figcenter">
+<img src="images/cover.jpg" alt=""/>
+</div>
+
+<hr style="width: 65%;" />
+
+
+<h1>THE WAILING OCTOPUS</h1>
+
+<h3>A RICK BRANT SCIENCE-ADVENTURE STORY</h3>
+
+<h2>BY JOHN BLAINE</h2>
+
+
+
+<h3>1956<br />
+BY GROSSET &amp; DUNLAP, INC.<br />
+NEW YORK, N. Y.</h3>
+
+<h3>ALL RIGHTS RESERVED</h3>
+
+<h3><i>Printed in the United States of America</i></h3>
+
+<h4>[Transcriber Note: Extensive research was unable to find a U.S. copyright renewal.]</h4>
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="illus1" id="illus1"></a>
+<img src="images/illus1.jpg" alt=""/>
+</div>
+
+<h3><i>With his spear Scotty jerked off the enemy frogman's face plate</i></h3>
+<hr style="width: 65%;" />
+
+<h2>Contents</h2>
+
+<!-- Autogenerated TOC. Modify or delete as required. -->
+<p>
+<a href="#CHAPTER_I">CHAPTER I <span class="smcap">Destination: Clipper Cay</span></a><br />
+<a href="#CHAPTER_II">CHAPTER II <span class="smcap">The Scuba Slip</span></a><br />
+<a href="#CHAPTER_III">CHAPTER III <span class="smcap">The Shadow</span></a><br />
+<a href="#CHAPTER_IV">CHAPTER IV <span class="smcap">Visitors by Night</span></a><br />
+<a href="#CHAPTER_V">CHAPTER V <span class="smcap">The Warning</span></a><br />
+<a href="#CHAPTER_VI">CHAPTER VI <span class="smcap">The Deadly Tank</span></a><br />
+<a href="#CHAPTER_VII">CHAPTER VII <span class="smcap">The Derelict</span></a><br />
+<a href="#CHAPTER_VIII">CHAPTER VIII <span class="smcap">The Fancy Frogmen</span></a><br />
+<a href="#CHAPTER_IX">CHAPTER IX <span class="smcap">Wreck of the "Maiden Hand"</span></a><br />
+<a href="#CHAPTER_X">CHAPTER X <span class="smcap">The Wailing Octopus</span></a><br />
+<a href="#CHAPTER_XI">CHAPTER XI <span class="smcap">Lights on Clipper Reef</span></a><br />
+<a href="#CHAPTER_XII">CHAPTER XII <span class="smcap">Clouds Over Clipper Cay</span></a><br />
+<a href="#CHAPTER_XIII">CHAPTER XIII <span class="smcap">Message in the Storm</span></a><br />
+<a href="#CHAPTER_XIV">CHAPTER XIV <span class="smcap">Below the Dark Coral</span></a><br />
+<a href="#CHAPTER_XV">CHAPTER XV <span class="smcap">How Sings the Gay Sardine?</span></a><br />
+<a href="#CHAPTER_XVI">CHAPTER XVI <span class="smcap">The Deadly Spring Gun</span></a><br />
+<a href="#CHAPTER_XVII">CHAPTER XVII <span class="smcap">Trapped in Twenty Fathoms</span></a><br />
+<a href="#CHAPTER_XVIII">CHAPTER XVIII <span class="smcap">The Fight on the "Maiden Hand"</span></a><br />
+<a href="#CHAPTER_XIX">CHAPTER XIX <span class="smcap">JANIG Takes To the Water</span></a><br />
+<a href="#CHAPTER_XX">CHAPTER XX <span class="smcap">The Buried Secret</span></a><br /><br />
+<a href="#The_RICK_BRANT_SCIENCE-ADVENTURE_Stories">The RICK BRANT SCIENCE-ADVENTURE Stories</a><br />
+</p>
+<!-- End Autogenerated TOC. -->
+
+
+<hr style="width: 65%;" />
+<h2>List of Illustrations</h2>
+
+<p><a href="#illus1"><i>With his spear Scotty jerked off the enemy frogman's face plate</i></a></p>
+
+<p><a href="#illus2"><i>Pretending to lose his balance, Rick fell squarely against the man</i></a></p>
+
+<p><a href="#illus3"><i>The valve assembly, traveling with bullet speed, barely missed Scotty's
+head</i></a></p>
+
+<p><a href="#illus4"><i>Rick turned in time to see a six-foot shark speed past</i></a></p>
+
+<p><a href="#illus5"><i>A third man lowered something that glistened like gold</i></a></p>
+
+<p><a href="#illus6"><i>Rick nudged Scotty to back away</i></a></p>
+
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="map" id="map"></a>
+<img src="images/map.jpg" alt=""/>
+</div>
+
+<h3>Spindrift Island</h3>
+<hr style="width: 65%;" />
+
+<h2>THE WAILING OCTOPUS</h2>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_I" id="CHAPTER_I"></a>CHAPTER I</h2>
+
+<h3>Destination: Clipper Cay</h3>
+
+
+<p>The Sky Wagon droned through Caribbean skies, following a compass course
+that led to Charlotte Amalie, capital city of the Virgin Islands. With
+eager interest, the four people in the small plane watched the blue
+water below. In a few moments they should pass over the island that was
+their ultimate destination.</p>
+
+<p>Rick Brant, in the pilot's seat, turned to the husky, black-haired boy
+next to him. "See anything yet?" he asked.</p>
+
+<p>Don Scott had been surveying the far horizon through binoculars. He took
+them from his eyes and shook his head. "Nothing but water. You sure
+there is an island called Clipper Cay?"</p>
+
+<p>Rick let the plane fly itself for a moment while he stretched
+luxuriously. He was a lean, long-legged boy with brown hair and eyes and
+a bone-deep tan. He grinned at his friend. "No faith. That's the trouble
+with you."</p>
+
+<p>"No logic, that's the trouble with you," Scotty countered. "If there
+were such an island it would be called an island, not a cay. A cay is
+something that follows an O, as in okay."</p>
+
+<p>The two scientists in the rear seat had been listening with amusement to
+the boys. Since the start of the expedition Scotty had professed doubt
+and misgiving, more for the sake of conversation than anything else,
+Rick was sure.</p>
+
+<p>Dr. Anthony Briotti, archaeologist of the Spindrift staff, leaned
+forward. "At least pronounce it correctly, Scotty. 'Cay' is pronounced
+'key.'"</p>
+
+<p>"See?" Scotty exclaimed triumphantly. "The only place where they have
+islands called keys is in Florida. We're on a wild-goose chase, I tell
+you!"</p>
+
+<p>Big Hobart Zircon, a nuclear physicist and long-time friend of the boys,
+tapped Scotty on the shoulder. "Since you're so certain of that, may I
+ask why you came?"</p>
+
+<p>Scotty tried to look martyred. "Only because of the buddy system," he
+said solemnly. "The first rule of underwater safety&mdash;or above-water
+safety, for that matter&mdash;is that you have to swim with a buddy. You and
+Tony swim together, so I had to go along as a buddy for Rick. Somebody
+has to chase the mermaids away from him, and it might as well be me."</p>
+
+<p>"That's nice of you," Rick said soberly. "There'll probably be a whole
+horde of mermaids guarding the treasure, not to mention half a dozen sea
+monsters."</p>
+
+<p>Tony Briotti said, "There's one mermaid I wish were with us, and that's
+Barby. After all, she started this whole thing. Too bad she has to miss
+out."</p>
+
+<p>Rick's pretty sister, Barbara Brant, had unwittingly launched the flight
+to the Virgin Islands by getting into an argument with Tony Briotti
+about the authenticity of the legend that pirates had once used
+Spindrift Island as a hangout. Tony had challenged the legend. After
+that, of course, proof had to be found.</p>
+
+<p>Rick had recalled digging up the remains of a campfire in Pirate's Field
+during the installation of equipment for the moon rocket, the first
+great experiment that had put the Spindrift Island scientific group in
+business as a research foundation headed by Rick's father, Hartson
+Brant. It was during this experiment that Scotty had joined the staff
+after rescuing Rick from an unscrupulous gang. The two boys had been on
+a number of expeditions together since that time and were fast friends.
+Zircon was one of the original Spindrift group. Youthful Tony Briotti
+was one of the new staff members, but he had already earned the loyalty
+and friendship of the boys by his fine leadership of the expedition to
+the Philippines, as related in <i>The Golden Skull</i>.</p>
+
+<p>Starting with the campfire site, Barby and the boys had excavated
+Pirate's Field under Tony's direction. They had unearthed positive
+evidence that pirates had landed there. The most vital evidence was the
+remains of a logbook, once the log of the bark <i>Maiden Hand</i>, sunk by
+the woman pirate Anne Bonney off the island of Clipper Cay in the Virgin
+Islands.</p>
+
+<p>Scotty turned and looked at the two scientists. "I'm just kidding, of
+course. You couldn't have kept me from coming without tossing me into
+irons. But seriously, do you expect to find treasure, Tony?"</p>
+
+<p>The archaeologist grinned. "Depends on what you mean by treasure. As I
+recall, one definition is 'something rare or precious.' Well, a chance
+to go skin diving in the Virgin Islands is certainly that&mdash;a rare and
+precious opportunity. At least I think so."</p>
+
+<p>Hobart Zircon grunted, "And so do I."</p>
+
+<p>"Amen," Rick echoed.</p>
+
+<p>"You're evading the issue," Scotty accused. "You know perfectly well
+what I mean. Do you expect to find that golden statue mentioned in the
+logbook?"</p>
+
+<p>"Expect? On a treasure hunt, one hopes; one doesn't expect," Zircon
+stated in his booming voice.</p>
+
+<p>Rick smiled to himself. Probably no Spindrift expedition ever had
+started with such a flimsy excuse. According to the log of the <i>Maiden
+Hand</i>, the ship had gone down before the pirates could locate a golden
+statue of St. Francis, hidden by the bark's captain, Thomas Campion.
+According to Captain Campion, the statue had weighed "an
+hundred-weight." Certainly a hundred pounds of gold was worth going
+after, but there were a few considerations that made finding it rather
+unlikely.</p>
+
+<p>In Captain Campion's words: "<i>That we did prevent the boucaniers from
+fynding the blessede statue was moste fortunate, yette the bark did go
+to her deathe in twentye fathomes, and so the statue is loste.</i>"</p>
+
+<p>Rick and Scotty had become underwater enthusiasts on their return from
+the Philippines, and both had aqualung equipment that would take them to
+twenty fathoms without difficulty. However, working time at that depth
+was sharply limited by the capacity of their tanks. This was assuming
+that they were able to find the wreck of the <i>Maiden Hand</i> in the first
+place.</p>
+
+<p>Still, there was enough of a chance to provide an excuse for a vacation
+expedition. The real purpose, so far as Rick was concerned, was to get
+in some superb swimming in clear water. He also intended getting plenty
+of underwater movies of the colorful reefs and fish. Scotty planned to
+do some underwater hunting.</p>
+
+<p>Tony Briotti's interest grew out of his profession. The Virgin Islands
+had been pretty well worked over by archaeologists, and most of the
+early Indian middens and mounds explored. But on the west coast,
+archaeologists equipped with aqualungs had recently found primitive
+artifacts a half mile offshore, and Tony wanted to do a little
+underwater artifact hunting of his own.</p>
+
+<p>Hobart Zircon was the only one without a specific objective. He had
+readily agreed to go along simply because he wanted a vacation. He had
+said, "Tell you what, I'll go along and do some surface fishing. Rick
+and Scotty can catch fish underwater and put them on my hook, then
+signal me to pull up. If the fish aren't heavy enough to ruin my rest,
+I'll haul them in."</p>
+
+<p>Mr. and Mrs. Brant had already made plans to take a vacation in Canada,
+and Barby was registered at a summer girl's camp. Weiss, Winston,
+Gordon, and Shannon, the other staff scientists, were away on various
+projects. So the four "treasure hunters" had welcomed an excuse to go
+off on a venture of their own.</p>
+
+<p>They would have a wonderful time, Rick thought, and who knew? They might
+even find the treasure!</p>
+
+<p>Scotty had been looking through the binoculars again. He gave Rick a
+grin. "I take it all back," he said. "There's an island ahead."</p>
+
+<p>The scientists leaned forward eagerly, and Rick strained to see. Sure
+enough, in a few moments they began to make out the island on the
+horizon ahead. Rick had enough confidence in his navigation to be
+certain that it was Clipper Cay.</p>
+
+<p>The group had spent the night in Puerto Rico, then departed early in
+order to fly off the direct route for an advance look at Clipper Cay.
+Rick didn't intend to land. He would circle the island once or twice,
+then head again for Charlotte Amalie on the island of St. Thomas.</p>
+
+<p>Scotty asked, "Where does the word 'cay' come from, anyway?"</p>
+
+<p>Tony Briotti answered. "It's from the Spanish, Scotty. It means island,
+or islet. However, the Spanish got it from the Taino people, who were
+the Indians of the Antilles."</p>
+
+<p>The island was close enough now so that they could discern its shape.
+Rick saw that it formed a rough crescent, running from north to south.
+It was about a mile long, perhaps a half mile wide at its greatest
+width, tapering to the horns of the crescent. He saw also that the color
+of the water changed gradually from the fathomless blue of the ocean to
+the green of shallow water.</p>
+
+<p>Inwardly excited, he put the nose of the plane down and let the small
+craft pick up speed. Scotty grinned his pleasure, and Rick knew that his
+pal was just as excited in spite of his joking skepticism.</p>
+
+<p>Rick leveled off at an altitude of four thousand feet and put the plane
+in a wide circle. Zircon leaned over Tony to look out the window, and
+Rick had to compensate in a hurry because the big scientist's weight
+threw the plane out of trim. Then Scotty, just as eager, leaned over to
+Rick's side and the trim had to be corrected again.</p>
+
+<p>The island was a travel agent's wildest dream. The blue water gradually
+shifted to green, then lighter green, and finally the white of lovely
+beaches on both sides of the island. Lines of surf marked the position
+of reefs off both shores.</p>
+
+<p>Somewhere along the western reef was the wreck of the <i>Maiden Hand</i>.
+Rick wondered if they would have diver's luck and locate the ancient
+bark, and at the same moment he was sure they would.</p>
+
+<p>"Plenty of vegetation," Briotti remarked.</p>
+
+<p>"Probably palms, perhaps some mangrove," Zircon agreed. "Take us down
+for a closer look, Rick."</p>
+
+<p>Rick obliged by standing the Sky Wagon up on a wing and sliding down as
+quickly as safe flying allowed. He, too, wanted a closer look. He cast a
+glance at his gas gauge. There was enough fuel, with a margin of safety,
+unless he got too enthusiastic about lingering around the island.</p>
+
+<p>He leveled off again at a thousand feet and flew up the east coast,
+between the outer reef and the beach. This was the Atlantic side of the
+island, and the surf on the reef was heavy.</p>
+
+<p>"Cottages," Scotty called. "Look!"</p>
+
+<p>They counted seven on the eastern side of the island, most of them near
+the middle. It was hard to see details among the palms, but they seemed
+small and unpainted, like fishermen's shacks. Rick reversed course and
+flew down the western side and they counted five more. One fairly
+pretentious beach house was near the northern tip of the island. In
+general, the houses on the western side seemed better kept, and slightly
+larger. A few houses had small docks. Off the southern tip of the
+island, on the western side, a boat was trolling. The occupants waved as
+Rick flew over.</p>
+
+<p>"Wonder which house is ours?" Scotty asked.</p>
+
+<p>They didn't know, of course. Arrangements for a beach house had been
+made for them by a friend of Zircon's, and not until they landed at
+Charlotte Amalie would they get the details. The same friend, Dr. Paul
+Ernst, had also arranged for a boat, to be used as a diving tender.</p>
+
+<p>Rick was tempted to land in the smooth water off the western shore. The
+Sky Wagon had been equipped with pontoons for that very purpose. They
+had realized that no landing place would be available on the cay for a
+wheeled aircraft. But there was little to be gained by landing now when
+they didn't even know which house would be theirs.</p>
+
+<p>Besides, there were supplies and equipment to be picked up and charts to
+be obtained, and the Sky Wagon needed to have the tank topped off, since
+they couldn't very well carry aviation gas to the island.</p>
+
+<p>Reluctantly, Rick asked, "Anyone want to see anything else?"</p>
+
+<p>"Not me," Hobart Zircon said flatly. "I want to get to Charlotte Amalie
+so we can get started back. That water looks clear enough to drink."</p>
+
+<p>"See any sign of wrecks on the bottom?" Tony inquired.</p>
+
+<p>No one had. No one had looked. They were too interested in getting an
+over-all view of Clipper Cay.</p>
+
+<p>Rick set his course for St. Thomas. Now that he thought about it, he was
+rather pleased with himself. The flight from Spindrift was the longest
+single trip he had ever taken in the Sky Wagon. The party had stopped
+for fuel as needed and had stayed overnight as darkness overtook them
+along the way. He had hit every destination on the nose, on time. And
+now the end of the trip was in sight without a single incident to mar
+its smoothness.</p>
+
+<p>In a short time the mountains of St. Thomas rose out of the sea, and
+soon afterward Rick circled high above the colorful roofs of Charlotte
+Amalie. He switched on his radio and asked for seaplane landing
+instructions. The airfield directed him to the proper landing place, a
+beach and pier at the edge of the city. Then Scotty took over the mike
+and, while Rick started in for a landing, asked the airfield tower to
+phone Dr. Paul Ernst, Zircon's friend, and notify him of their arrival.</p>
+
+<p>Apparently the tower operator phoned immediately, because as Rick taxied
+toward the dock, Zircon saw his friend waiting. Following the
+instructions of a dockman, Rick beached the Sky Wagon and cut the
+engine. Two husky Virgin Islanders hauled the ship higher onto the
+beach, and the Spindrifters climbed out.</p>
+
+<p>Dr. Ernst was a small, bespectacled man with a shock of unruly white
+hair. He looked like a country doctor&mdash;which was reasonable enough, Rick
+thought, because that's just about what he was. Charlotte Amalie, with a
+population of about 11,500, could not be described as a big city.</p>
+
+<p>The doctor greeted them all cordially, then immediately got down to
+business. "I'm sorry you are not remaining in Charlotte Amalie. However,
+Hobart, I have done as you requested. For tonight I have reservations
+for you at one of our oldest hotels, Alexander's Rest. Named for
+Alexander Hamilton, of course."</p>
+
+<p>Rick remembered that the Revolutionary hero had been brought up in the
+Virgin Islands.</p>
+
+<p>"The beach cottage is waiting at Clipper Cay. It is on the western side,
+the third from the southern tip of the island. You shall have my own
+boat. I think you will find it ideal for a diving tender. I call it the
+<i>Water Witch</i>. An attractive name, is it not? I have checked on your
+equipment. It is held at the warehouse in my name. The supplies you
+wished to buy here have been ordered and are waiting at Andersen's
+Supply House. I have told them you will be calling."</p>
+
+<p>The group listened, delighted at the obvious efficiency with which Dr.
+Ernst had taken care of Zircon's requests.</p>
+
+<p>By lunchtime they had picked up their equipment and supplies, Scotty had
+tested the twin diesel engines on the <i>Water Witch</i> and announced
+himself more than pleased, Rick had checked over the aqualungs and
+compressor that had come down with his camera and other equipment by
+freight, the supplies had been stowed, the Sky Wagon refueled, and
+nothing remained but to check in at the hotel. This, they had decided,
+could wait until after lunch.</p>
+
+<p>While the scientists drove off in Dr. Ernst's car to pick up the doctor
+at his office, Rick and Scotty walked into town, headed for "The Danish
+Pastry" where the group was to meet for lunch.</p>
+
+<p>Rick spoke his amazement. "Look at us," he marveled. "Ready to go. No
+trouble, no strain, no pain. Ever see an expedition get off to such a
+smooth start? We can't lose, Scotty. After a beginning like this we
+couldn't help finding the treasure."</p>
+
+<p>Scotty grinned his agreement. "I didn't ask," he said, "but I wouldn't
+be surprised if the good Dr. Ernst hasn't done some advance diving and
+marked the statue's location with a buoy hung around its neck, just to
+make things easier for us!"</p>
+
+<p>"Twenty fathoms," Rick said reflectively. "That's a lot of water.
+Besides, we don't know how accurate Captain Campion's guess was. We may
+be getting into water that's too deep for us."</p>
+
+<p>Which, though unknowing, was one of the most prophetic remarks he had
+ever made.</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_II" id="CHAPTER_II"></a>CHAPTER II</h2>
+
+<h3>The Scuba Slip</h3>
+
+
+<p>Charlotte Amalie had color. It was an old community, dating back to
+Danish ownership of the Virgin Islands, and there was a feeling of
+antiquity underneath the color of the tropics. There was no sharp lines
+to buildings; everything had a pleasant weathered look.</p>
+
+<p>"Friendly folks," Scotty observed, after the tenth passer-by had bidden
+them a good day. "Doesn't seem to matter whether they're rich or poor.
+They look happy, and they're certainly polite."</p>
+
+<p>"I like it," Rick agreed. "Those colored roofs get me." He stumbled on a
+cobblestone and added, "But the street could stand improving. Cobbles
+are fine for horses, maybe, but they're hard on cars."</p>
+
+<p>"What do they do here for a living?" Scotty asked. "Wish we had Chahda
+along. He could reel off the straight dope from his <i>Worrold
+Alm-in-ack</i>." Their Indian friend, Chahda, was at home in Bombay and
+they hadn't heard from him in some time. His ability to quote from <i>The
+World Almanac</i>, which he had memorized, had caused the boys considerable
+amusement, even while they appreciated having a kind of walking
+encyclopedia with them.</p>
+
+<p>They passed a fruit stand where women were shopping for mangoes,
+soursops, and other delicious-looking things, including sugar cane.
+"That's part of it," Rick said. "Sugar. This is also the headquarters
+for bay rum."</p>
+
+<p>Scotty's eyebrows went up. "<i>Bay</i> rum?" He stepped out of the way to let
+an ancient woman on a donkey go by. "What's the bay part of it?"</p>
+
+<p>Rick shrugged. "Search me. Anyway, you don't drink it, you put it on
+your face. I guess it was originally distilled from bayberry trees or
+something. Anyway&mdash;" He stopped suddenly as Scotty's fingers sank into
+his arm.</p>
+
+<p>"Look!" Scotty exclaimed.</p>
+
+<p>Rick looked, and let out a yell. "Steve! Steve Ames!" In the next moment
+he could have bitten his tongue out, because it was entirely possible
+that Steve wasn't traveling under his own identity.</p>
+
+<p>Ames was an athletic-looking young man in a white suit and Panama hat.
+He stopped at Rick's hail, turned, and waited for the boys to catch up.
+His face split in a pleased grin.</p>
+
+<p>Rick breathed his relief. Evidently Steve didn't mind being called by
+name.</p>
+
+<p>The boys knew Steve as Spindrift's contact with JANIG, the Joint
+Army-Navy Intelligence Group for which Spindrift had worked in the past,
+once to solve <i>The Whispering Box Mystery</i>, and again to track down the
+secret of <i>The Caves of Fear</i>.</p>
+
+<p>"Wonder what he's doing here?" Scotty muttered.</p>
+
+<p>"We'll soon find out," Rick said.</p>
+
+<p>Steve greeted them cordially. "What brings you two wanderers to these
+shores?"</p>
+
+<p>"We were about to ask the same of you," Rick returned.</p>
+
+<p>Steve grinned at the obvious curiosity in the boys' faces. "Nothing very
+exciting. I'm here on a little vacation. Swimming."</p>
+
+<p>"What kind of swimming?" Scotty wanted to know.</p>
+
+<p>"Oh, skin diving, mostly."</p>
+
+<p>"Gosh, that's wonderful!" Rick exclaimed. "Scuba or snorkel?"</p>
+
+<p>There was the barest of hesitations before Steve replied. "Snorkel.
+There's nothing that's more fun than snorkeling around the reefs. That's
+the only way to swim in waters like these. You can get right down among
+the fish."</p>
+
+<p>Rick saw Scotty's mouth open to point out Steve's error, but he stepped
+on his friend's foot and said quickly, "We're here for the swimming,
+too. Maybe we can join forces."</p>
+
+<p>He knew the answer would be no. Steve wasn't vacationing; he was on a
+case. A vacationing skin diver would know that a snorkel is nothing but
+a tube that allows a swimmer to float face down on the surface of the
+water while looking for something to dive after. Once the dive starts,
+the snorkel has no purpose, since its short length only allows it to
+project a few inches above the surface while a diver is floating face
+down. On the other hand, the Scuba&mdash;Self-Contained Underwater Breathing
+Apparatus, like the boys' aqualungs, really does allow the diver to get
+down among the fish.</p>
+
+<p>"Thanks for the invitation," Steve said. He smiled. "I don't usually try
+a cover story unless I have it down cold. Just for my future guidance,
+where did I slip? Your faces were quite a study."</p>
+
+<p>Rick told him. Steve nodded. "Thanks. I just got here on the morning
+plane, and I haven't been briefed yet. By tonight I'll be an expert on
+skin diving."</p>
+
+<p>The statement only whetted further Rick's over-sharp curiosity. If Steve
+was to be briefed on skin diving, it sounded like a case that would
+interest him and Scotty.</p>
+
+<p>Steve continued to smile. "I don't want to linger too long. Want to give
+me a hand?"</p>
+
+<p>Rick refrained from shouting and merely nodded his head. Scotty, with
+only slightly less restraint, said, "You know we do."</p>
+
+<p>"Fine. Don't look. In the doorway of the tailor shop is a
+dark-complexioned man in a gray sharkskin suit. He's a tail. He picked
+me up at the airport. I don't know the town well enough to lose him
+easily in broad daylight. Never been here before today. Take him out for
+me?"</p>
+
+<p>Rick and Scotty nodded. Neither looked toward the doorway. "How will we
+get in touch with you?" Rick asked.</p>
+
+<p>Steve hesitated. "There's no one I'd rather see more of, and no one I'd
+rather have on my side. But this case is not for you. Just do me this
+favor, then forget you saw me."</p>
+
+<p>"You never know when you'll need help," Rick pointed out. "We won't horn
+in, but it won't do any harm to know how we can reach other. Tonight
+we'll be at a hotel called Alexander's Rest. Tomorrow we take off for an
+island called Clipper Cay."</p>
+
+<p>"All right. If you really need to reach me, call the duty officer at the
+UDT base and leave a message. I'll get it."</p>
+
+<p>Rick turned slightly. In a plate-glass window across the street he could
+see a reflection of the tailor shop Steve had mentioned, and he could
+make out the form of a man in the shadowed doorway. He estimated that
+the shop was about fifty feet away.</p>
+
+<p>Scotty was also measuring the situation. He said, "Walk away from us so
+the tail will have to come by."</p>
+
+<p>Steve nodded. He shook hands, gave them each a grin, and was gone.</p>
+
+<p>Rick said loudly, "Give me your shoulder to lean on. I've got a rock in
+my shoe."</p>
+
+<p>Scotty obliged, and Rick half turned as he did so. He saw the man in the
+gray sharkskin suit saunter out of the doorway and start toward them.</p>
+
+<p>Rick balanced on one leg, one hand on Scotty's shoulder, the other hand
+fumbling with the shoelace on his lifted foot.</p>
+
+<p>The tail walked toward them, unfolding a paper as he did so. He was
+apparently devoting his full attention to the paper; his actions said he
+didn't even know the boys existed.</p>
+
+<p>"You ought to get tighter shoes," Scotty observed. "Then you wouldn't
+get stones in them."</p>
+
+<p>"Save the advice," Rick grunted. "I've got a knot in the lace."</p>
+
+<p>The man came abreast of them, between Rick and the building, and in that
+moment, clawing wildly for balance, Rick lost his hold on Scotty's
+shoulder. He fell squarely against the man in the gray suit and crushed
+him into the building.</p>
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="illus2" id="illus2"></a>
+<img src="images/illus2.jpg" alt=""/>
+</div>
+
+<h3><i>Pretending to lose his balance, Rick fell squarely against the man</i></h3>
+<hr style="width: 65%;" />
+
+<p>"Hey!" the man yelled. "What's the idea?"</p>
+
+<p>Scotty rushed to the rescue, took the fallen shadow by the shoulders,
+and tried to pull him to his feet. This only made matters worse, since
+Rick was stretched across his legs.</p>
+
+<p>"I'm so sorry," Scotty said. "Gosh, I'm sorry. He slipped. Here. Let me
+help you up."</p>
+
+<p>"Get off me," the man yelled.</p>
+
+<p>Rick tried, lost his balance again, and fell against the man's chest,
+pinning him to the sidewalk.</p>
+
+<p>Scotty groaned. "Rick! You clumsy ox. Get off the man!"</p>
+
+<p>"I'm trying to," Rick said plaintively. "My shoe came off. Here. Help me
+up."</p>
+
+<p>"Help yourself!" Scotty returned sharply. "I'm trying to help this
+gentleman."</p>
+
+<p>Rick rolled clear and Scotty got the man to his feet. He was something
+less than spotlessly clean, thanks to the dust of the road, and there
+was a rip in the arm of his coat.</p>
+
+<p>"Look at that!" Scotty exclaimed. He made ineffectual efforts to dust
+the man off. "Rick, you ripped his coat."</p>
+
+<p>Rick looked embarrassed. "I'm terribly sorry. Here, sir. Let me take you
+to this tailor shop. We can have it repaired in a jiffy."</p>
+
+<p>"Forget it!" the man snapped. "And get out of my way. I'm in a hurry."</p>
+
+<p>"It was all my fault, and I refuse to take no for an answer," Rick said
+firmly. He took the man by the arm. "Come on. It will only take a
+moment. You can't walk around town like that. I insist on having your
+suit repaired. I'm sure that the tailor can mend it so no one would ever
+notice."</p>
+
+<p>"No," the man grated. "Please stand aside." Both boys had managed to
+block the sidewalk.</p>
+
+<p>"Please," Rick pleaded. "This is terribly upsetting. We really should
+have the damage to your suit repaired."</p>
+
+<p>The man's dark complexion was turning a grayish pink with rage. Rick
+estimated quickly. If he knew Steve Ames, the JANIG agent was long gone,
+and the tail would not catch up with him again. They had delayed the
+shadow for perhaps two minutes, but for Steve that would be enough.</p>
+
+<p>Rick stepped aside. "Very well. If you insist&mdash;"</p>
+
+<p>"I do." The man brushed by and hurried off.</p>
+
+<p>The boys looked at each other and grinned.</p>
+
+<p>"He won't catch Steve," Rick said.</p>
+
+<p>"Not a chance. Well, my clumsy friend, shall we put your shoe back on
+and go meet the others for lunch?"</p>
+
+<p>"We shall," Rick returned. "Indeed we shall." He slipped his shoe on and
+tied it quickly. "Wasn't it interesting, where Steve said we could reach
+him?"</p>
+
+<p>Steve had said at the UDT base. That meant simply at the home of the
+Navy frogmen&mdash;the Underwater Demolition Teams. No wonder Steve had said
+he would be an expert on skin diving by nightfall. He was going to be
+with the most expert experts of all.</p>
+
+<p>Rick sighed. "Just our luck he doesn't want us in the case. Wouldn't it
+be great to work with the Navy frogmen? We could learn plenty."</p>
+
+<p>"Forgetting St. Francis?" Scotty inquired. "There he lies, twenty
+fathoms down, probably covered with barnacles and waiting to be rescued.
+And you want to go fogging off with the frogmen."</p>
+
+<p>"All right, all right! Don't rub it in. We'll go back to being
+interested in the bark <i>Maiden Hand</i>. And St. Francis. And pirates.
+Let's cast off, my hearty."</p>
+
+<p>The Danish Pastry was only a few blocks away, and Dr. Ernst and the
+Spindrifters were already seated. The boys joined them, with apologies
+for being late, but without mentioning their meeting with Steve Ames.
+There was nothing to be gained by bringing the matter up in front of Dr.
+Ernst. They could tell Zircon and Tony later. Zircon knew Steve, but
+Tony didn't.</p>
+
+<p>Over dessert, Dr. Ernst reached into his bag and brought forth a chart.
+"I thought you might need this," he said.</p>
+
+<p>It was a detailed chart of Clipper Cay and the surrounding waters. It
+showed clearly the position of the reefs, and it gave soundings that
+showed the depths.</p>
+
+<p>Zircon shook his massive head. "Paul, your thoroughness has never failed
+to amaze me. What would we have done without you?"</p>
+
+<p>Ernst smiled his pleasure. "Thank you, Hobart. I try to be thorough.
+Besides, I want you all to have a pleasant recollection of the Virgin
+Islands. We who live here love them very much."</p>
+
+<p>The boys and Tony echoed Zircon's thanks, then fell to a study of the
+chart.</p>
+
+<p>It was apparent that the water deepened rapidly beyond the western reef.
+In a few places, the twenty-fathom line was only a short distance out.</p>
+
+<p>"Have you any idea where this ship went down?" Dr. Ernst asked.</p>
+
+<p>"A bare idea," Tony replied. "It was off the western shore of the
+island, probably close to the reef, in twenty fathoms. The bark had been
+hit and was sinking. The captain ran for the island with the hope of
+beaching the ship on the reef, but he never made it. The bark went down,
+and Anne Bonney's pirates picked up the survivors."</p>
+
+<p>"We know of Anne Bonney here," Dr. Ernst told them. "You realize that
+the Virgin Islands were once a hangout for pirates? Oh, we have a dark
+and bloody history, what with piracy, slave rebellions, even Indian
+massacres."</p>
+
+<p>"You'd never know it," Rick said. "This is the most peaceful place I've
+seen in years."</p>
+
+<p>He didn't add that the peace was only apparent. Steve Ames wasn't needed
+in really peaceful places. Something was stirring under the tropical
+calm of St. Thomas.</p>
+
+<p>"Tonight you must have a taste of St. Thomas home life," Dr. Ernst said.
+"You shall be my guests at dinner. Dr. Briotti will be interested in my
+collection of Indian pottery. And you young men will be interested in my
+wife's hobby, which is fish. She has an amazing collection."</p>
+
+<p>"Alive?" Scotty asked.</p>
+
+<p>"Yes, indeed. In salt-water aquariums. Our misfortune makes it easy. You
+see, we have no natural fresh-water supplies on St. Thomas. We depend on
+catching rain for our drinking water. So our plumbing is operated by sea
+water, of which we have plenty. As a result, Mrs. Ernst is able to have
+a constant supply of salt water flowing through her aquariums. I know
+you'll be interested."</p>
+
+<p>The boys agreed. Mrs. Ernst's hobby sounded like fun.</p>
+
+<p>After lunch Dr. Ernst departed for his office, leaving the Spindrift
+group to their own devices. Not much remained to be done, except for
+checking in at their hotel. For now, they were content to walk around
+town.</p>
+
+<p>As they passed the post office where Alexander Hamilton had once been a
+clerk, Scotty smiled meaningfully at Rick.</p>
+
+<p>"Steve lost a tail this morning. Remember?"</p>
+
+<p>Rick looked at him doubtfully. "Of course. Why?"</p>
+
+<p>"Somebody loses, somebody gains," Scotty replied cheerfully. "Don't look
+behind you, but we've found one!"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_III" id="CHAPTER_III"></a>CHAPTER III</h2>
+
+<h3>The Shadow</h3>
+
+
+<p>The two scientists had been walking ahead of Rick and Scotty, but
+Zircon's keen ears had overheard the boys' remarks. However, he was too
+wise to make his interest obvious. He waited until the group passed a
+store with a large display, then stopped, as though to examine it.</p>
+
+<p>Rick found himself surveying a collection of tools for the
+do-it-yourself addict.</p>
+
+<p>"What's this about Steve and a tail?" Zircon asked. He pointed at a
+power-drill set, as though discussing it. His normally loud voice
+couldn't have been heard five feet away.</p>
+
+<p>Rick shook his head, then pointed at a different drill set. Anyone
+watching would have thought the tools were the subject of conversation.
+Rick quickly outlined what had happened and concluded, "Scotty spotted a
+tail on us a few minutes ago. Same guy?"</p>
+
+<p>Scotty bent down for a closer look at a series of wood power bits. His
+voice was scarcely audible. "Not the same one. This one is a Virgin
+Islander. Looks like a farmer. When we stopped he walked right on by.
+He's out of sight now. But he'll pick us up as soon as we start."</p>
+
+<p>Tony Briotti, to whom this kind of adventure was new, asked, "What do we
+do about it?"</p>
+
+<p>"Nothing," Zircon answered. "Steve Ames wanted to get rid of his shadow
+and the boys helped him out. But we have no particular reason for
+wanting to get rid of ours. Let him follow. Undoubtedly whoever is
+tailing Steve got interested when they saw him talking with the boys,
+but they'll learn nothing by trailing us."</p>
+
+<p>"And it's one less for Steve to contend with," Rick added.</p>
+
+<p>Scotty straightened up. "I have to admit this bunch of tools is
+beginning to bore me a little. Where are we going?"</p>
+
+<p>Zircon shrugged. "I have nothing in mind. We might check in at the
+hotel."</p>
+
+<p>"I'd rather swim," Rick said.</p>
+
+<p>"Same here." Scotty made a quick survey of the street without seeming to
+do so. "No sign of our friend. He's probably in another doorway."</p>
+
+<p>"Then Hobart and I might as well check in," Tony suggested. "I'd like a
+swim, but frankly I'm a little sleepy from too much lunch."</p>
+
+<p>"How about checking in for us?" Rick asked. "Then we could get right
+into the water. No need for all of us to go to the hotel."</p>
+
+<p>The scientists agreed, and at Scotty's suggestion hailed a taxi. As the
+car rolled off toward the boat where their luggage was stored, Scotty
+grinned. "This was the only taxi in sight. Wonder how our friend will
+manage to follow us?"</p>
+
+<p>He had his answer at the pier. While Zircon was piling their overnight
+bags into the taxi, a farmer rode past on a bicycle. He didn't look at
+them. "There he goes," Scotty said. "Pretty easy after all. Guess the
+town is small enough so he wasn't worried about finding us."</p>
+
+<p>"We'll give him a choice to make when Tony and I leave." Zircon smiled.
+"Let's see whether he stays with you, or follows us."</p>
+
+<p>Not until the boys had changed to swimming trunks in the cabin of the
+<i>Water Witch</i> did they find the answer to Zircon's question. The shadow
+had decided to stay with them. This time it was Rick who spotted him.
+The shadow was nearly hidden beyond a curve in the shore line. To anyone
+not aware of being tailed, he would have appeared to be with any of the
+other casual figures that went unhurriedly about their business in the
+neighborhood. If Scotty hadn't pointed him out, Rick would not have
+suspected that the shadow had the slightest interest in the Spindrift
+party.</p>
+
+<p>"We going to rig the aqualungs?" Scotty asked.</p>
+
+<p>"Let's not bother. Masks, snorkels, and fins. We can swim out and take a
+look at some of the coral heads."</p>
+
+<p>"How about a gun?"</p>
+
+<p>Rick considered. "I guess not. We don't want to do any hunting. But you
+might take a hand spear in case something real inviting shows up. And
+let's take our knives." He had also decided against taking his camera. A
+leisurely, unencumbered swim was what he wanted. There would be time
+enough for hunting fish or taking pictures later, when they got to
+Clipper Cay.</p>
+
+<p>While Scotty went into the cabin to select a spear from their assortment
+of fishing gear, Rick surveyed the <i>Water Witch</i> with satisfaction. It
+was a thirty-five-foot craft with a small cabin forward and a spacious
+cockpit aft. It had been used as a diving tender before, apparently,
+because there was a ladder that could be swung outboard for a diver to
+use. There was also a small boom that could be rigged quickly for
+lowering or lifting gear from the water.</p>
+
+<p>The gas tanks were ample for their purposes. One filling would be more
+than sufficient for a round trip to Clipper Cay plus any cruising they
+would do while at the island. The tanks were full.</p>
+
+<p>Water capacity, an important consideration on waterless Clipper Cay, was
+more than adequate. In addition to a built-in fifty-gallon tank in the
+cabin, there was a rack of five ten-gallon jerry cans in the cockpit.</p>
+
+<p>Scotty emerged from the cabin with a short, low-powered spring gun.
+"Thought I might as well bring a light gun," he said. "It's just as easy
+to carry as a spear."</p>
+
+<p>"Okay." Rick led the way down the pier to the beach, carrying his mask,
+snorkel, and slippers. These he placed carefully on one of the Sky
+Wagon's pontoons, in order to protect the clear glass of his mask from
+any possible scratching. Then, with a yell to Scotty to hurry, he
+bounded through the shallows, threw himself forward, and planed along
+the surface of the water. Lifting his head for a quick breath, he dove
+under, feeling the wonderful coolness of the water close over him. He
+judged its temperature quickly. It was close to eighty degrees, he
+estimated, and cool only by comparison with the warm air.</p>
+
+<p>He reversed course quickly and stood up. Scotty was also in the water.</p>
+
+<p>"I'm glad we didn't bother with suits," Rick said. "In water like this
+we'd even be too warm in midseason suits."</p>
+
+<p>Because of the coldness of the water off the New Jersey coast, the boys
+had equipped themselves with full, waterproof rubber suits under which
+long under-wear was worn, and with lighter "midseason" suits of foam
+neoprene. Because of the reported warmth of water in the Virgin Islands
+they hadn't added the suits to their already heavy load of supplies.</p>
+
+<p>They returned to the beach, picked up their equipment, and took it into
+the water. Rick sat down and rinsed out his flippers, then carefully
+removed the last traces of sand from his feet. He pulled the flippers
+on, adjusting them for maximum comfort. His face mask was next. He spat
+into it, then rubbed the saliva over the glass. This rather
+unsanitary-appearing trick was essential, since saliva is an excellent
+antifogging compound needed to help keep the glass clear underwater.
+Then he rinsed his mask lightly and adjusted the head straps, leaving
+the mask on his forehead.</p>
+
+<p>The snorkels used by the boys were plastic tubes curved at both ends. At
+one end was a mouthpiece; at the other was a cage that held a rubber
+ball. A dive or rough wave action floated the ball upward, closing the
+tube and preventing water entry. Rick and Scotty adjusted the rubber
+bands of their snorkels around their heads above the mask straps.</p>
+
+<p>Scotty was ready. He slipped his mask into place, molded the soft rubber
+skirt of the mask to the contours of his face, inhaled through his nose
+to make sure the seal was airtight, then called, "Let's go!" He gripped
+the mouthpiece of his snorkel between his teeth, the rubber flange under
+his lips, and slid into the water.</p>
+
+<p>Rick was right behind him. As his mask touched water he saw the white
+coral sand of the bottom a few inches down. The only sign of life was a
+hermit crab, perhaps a half inch in length, dragging his home of the
+moment&mdash;a tiny spiral shell.</p>
+
+<p>In one hand, Scotty carried the spear gun by its pistol grip. He swam in
+the position that suited him best, both arms hanging limply down. Rick,
+on the other hand, preferred to swim with arms relaxed along his sides,
+as long as his hands were empty. When carrying a spear gun or his
+camera, he also swam with arms hanging downward. Neither boy used his
+arms for swimming. The rhythmic, powerful leg strokes were enough,
+thanks to the swim fins.</p>
+
+<p>The water deepened rapidly but lost none of its clarity. Even at a depth
+of a dozen feet, Rick thought, he could have counted every grain of
+sand. This was unlike anything he had ever experienced. At home,
+visibility of five feet was considered good. Lost in the enjoyment of
+really clear water, he completely forgot about the shadow.</p>
+
+<p>Scotty reminded him. He touched Rick's arm and signaled a stop. The boys
+removed their snorkel mouthpieces and faced each other upright in the
+water, holding position with easy flipper movements.</p>
+
+<p>"Just pretend we're talking," Scotty said. "Don't look around. I'm
+trying to spot our friend over your shoulder." After a moment he shook
+his head. "No sign. Wonder if he ran for a bathing suit?"</p>
+
+<p>"Forget him. Let's swim. See any coral heads?"</p>
+
+<p>"Darker water off yonder. Let's look."</p>
+
+<p>They readjusted their snorkels and headed in the direction Scotty had
+indicated.</p>
+
+<p>Rick breathed easily through his tube, constantly scanning the bottom.
+Now and then he saw various kinds of debris on the bottom, including
+abandoned beer cans and a section of newspaper that had not yet rotted
+away. Rubbish like this was to be expected in a harbor, he supposed,
+still it was as unattractive to a swimmer as junk along the roadside is
+to the motorist.</p>
+
+<p>Suddenly he noticed a fish&mdash;the first he had seen. He took a deep breath
+and dove by letting his head drop and then lifting his legs to a nearly
+vertical position. He slid underwater without a splash. When his fins
+were below the surface he started his leg motion again, and the flippers
+propelled him smoothly downward.</p>
+
+<p>The fish was perhaps a foot long, silvery, with a pointed nose and
+yellow fins. Rick couldn't identify it. The fish was busily rooting in
+the sand for morsels of food and paid no attention to the diver until
+Rick reached out and almost touched it, then it sped just beyond reach
+and commenced rooting again.</p>
+
+<p>His curiosity satisfied for the moment, Rick surfaced and rejoined
+Scotty. As he took position at his friend's side, the other boy hooted
+once, their signal for "attention." The hooting was done by making a
+kind of "hooty" groan into the snorkel mouthpiece, about the only sound
+that could be made without letting water pass the lips. Because water
+conducted sound so well, the hoot could be heard clearly some distance
+away.</p>
+
+<p>Rick lifted his face from the water and saw that Scotty was pointing to
+an area a short distance to their right. He followed Scotty's lead and
+saw the reason for the signal. It was a rocky, coral-covered area about
+thirty feet square and perhaps fifteen feet below the surface.</p>
+
+<p>The boys swam directly over it, then floated motionless, watching the
+activity below. At first glance, there appeared to be only a pair of
+odd-shaped file-fish nibbling at the formation, but as their vision
+adjusted they made out literally dozens of tiny, colorful fish in
+clefts, under overhangs, or waiting motionless against a patch of color
+on the rocks. Rick pointed to a school of about ten vivid little fish of
+electric-blue color. The largest was less than two inches long. Scotty
+hooted for attention and pointed in his turn to a section of the rock
+that held over a dozen sea urchins that looked like black horse
+chestnuts with exaggerated spines.</p>
+
+<p>Rick watched a pair of brown doctorfish about eight inches long swim by
+below, then his attention was attracted by a brilliant red squirrelfish
+peering out of a cleft. He pointed the red fish out to Scotty, who in
+turn showed him where a little moray was peering out of a hole near the
+base of the rock.</p>
+
+<p>Rick was fascinated. If a tiny patch of rock held this amount of life,
+what must the real reefs be like off Clipper Cay? He was suddenly
+impatient to get going, to put on his aqualung and explore the reef from
+top to bottom. And if they should really find the wreck of the <i>Maiden
+Hand</i>, there was every chance that the exploration of the wreck and the
+sea life it had acquired would more than compensate for the treasure
+none of them really hoped to find anyway. What a vacation!</p>
+
+<p>He was suddenly conscious of a throb in his ears. He listened and tried
+to identify it. A motorboat of some kind, but it didn't sound like a
+very powerful one. He lifted his head and searched for it.</p>
+
+<p>Scotty, too, had heard the boat. He began to tread water, lifting his
+mask, then rinsing it because it had fogged a little.</p>
+
+<p>Rick spotted the boat. It looked like a large row-boat, powered with an
+outboard motor, and it was headed in their direction.</p>
+
+<p>Scotty took his snorkel out of his mouth. "Better stay topside and
+watch. We don't want to start our vacation by getting run over."</p>
+
+<p>"Too true," Rick said. "Isn't this great? I've never seen so many kinds
+of small fish in one place in my life. Wait until we get out to the
+reefs where the big ones are."</p>
+
+<p>Scotty patted his spear gun. "I'll keep us supplied with fresh sea food.
+Wonder if there are any lobsters around?"</p>
+
+<p>But Rick had stopped listening. "Scotty, that guy is heading right for
+us!"</p>
+
+<p>The boat was getting close, and through his face plate Rick could make
+out the figure of a single occupant.</p>
+
+<p>Scotty suddenly gripped his arm. "Rick! It's our shadow!"</p>
+
+<p>Rick started. "Are you sure?"</p>
+
+<p>"Yes. I don't like this. What would he come out here for? Get ready to
+dive." Scotty pulled his mask into place and molded it to his face, then
+gripped his snorkel between his teeth.</p>
+
+<p>Rick followed suit and leveled off in the water in diving position, but
+he hesitated, waiting to see what the boat would do.</p>
+
+<p>It didn't take long to find out. The boat stayed on a perfectly straight
+course, headed directly for them. Rick waited. Perhaps the shadow
+intended to sheer off when he got close. He might have come out to talk
+with them.</p>
+
+<p>Scotty hooted four times, their signal for danger! Then he went under.
+Still Rick hesitated, until it was clear that the boat did not intend to
+swerve. He saw the shadow's face, set in grim lines, then his legs went
+up and he slid under, using his hands as well as his legs to pull
+himself down to safety. He thought incredulously, "He tried to run us
+down!"</p>
+
+<p>A dozen feet under he turned over on his back and saw the bright circle
+of the propeller and its trail of foam. The boat was past. He shot to
+the surface and filled his lungs with air, waiting for the next move.</p>
+
+<p>The boat spun around in a tight turn and headed back.</p>
+
+<p>Scotty surfaced next to Rick, pulled the snorkel from his mouth, and
+gritted, "Swim away. Let him use you for a target. I'm going to get that
+son of a spiny sea walrus."</p>
+
+<p>Rick saw from the position of the spear in Scotty's gun that his friend
+had charged the weapon during the dive. He nodded, then turned and swam
+away, flippers flailing as though trying to hurry. He watched over his
+shoulder and saw the boat head for him.</p>
+
+<p>He was breathing hard from the excitement now, but he took a deep breath
+and got ready to dive. But still he swam, leading the rapidly overtaking
+boat until it was almost on him. Only then did he shoot downward,
+twisting as he went. He looked back in time to see Scotty sight the
+spear gun and fire as the boat went past.</p>
+
+<p>At first Rick thought his pal had missed, then he realized what Scotty
+had done. The spear shaft was attached to a long wire leader, and the
+leader to a safety line coiled around a spool just ahead of the pistol
+grip. Scotty had deliberately fired ahead of the propeller, knowing that
+the wire leader would be caught and would wrap around the shaft.</p>
+
+<p>Rick saw the spear stop short as the wire caught, saw it hauled back
+against the propeller and drop free as the prop blades cut it loose.
+Scotty shot up for a breath, then dove instantly, toward the rapidly
+falling spear.</p>
+
+<p>Rick had to breathe himself. He surfaced, caught a quick breath, then
+went under again. Scotty was picking up the spear. Rick saw him place it
+in the gun barrel, swing the loader over the razor-sharp harpoon head,
+and shove down on the spring. In a moment the gun was loaded again.
+Luckily the spear had not bent when the prop blade hit it.</p>
+
+<p>The boat had come to a halt, the engine dead. The propeller could no
+longer turn against the wrapping of wire and heavy fishline. Scotty
+hooted twice, their signal to surface, and Rick followed him up. Near
+the surface they separated, Rick taking the side of the boat away from
+his friend. He longed for a weapon, even a hand spear. But he was
+helpless. Scotty would have to get in the first blow with the gun. But,
+Rick thought, that might give him time to get over the gunwale to
+grapple with the shadow.</p>
+
+<p>His head broke water. He pulled the snorkel from his mouth and let it
+hang. As luck would have it, the shadow saw him first. He stood up, oar
+in hands, poised for a swing at Rick's head.</p>
+
+<p>Scotty's voice stopped the swing. "Don't do it or you'll get three feet
+of steel through you!"</p>
+
+<p>The man turned and faced the needle point of Scotty's spear. The oar
+dropped from his hands.</p>
+
+<p>Rick gulped his relief. Apparently the shadow had no weapon.</p>
+
+<p>"Jump overboard!" Scotty ordered.</p>
+
+<p>The man hesitated. Scotty thrust the spear gun forward. "Jump, I said!"</p>
+
+<p>The shadow did, and sank in a flurry of bubbles. When he rose to the
+surface again, the point of the spear was against his back. "Hang on to
+the boat with both hands," Scotty directed.</p>
+
+<p>Rick got to his side with a kick of the flippers and ran his hands over
+the man's clothing. He found a switch knife, which he put in his belt.
+"He's clean," he said. "No other weapons."</p>
+
+<p>"Take a look in the boat," Scotty suggested.</p>
+
+<p>Rick did so, lifting himself up on the gunwale. There was nothing in the
+boat but oars and a can of gasoline.</p>
+
+<p>"Want to tell us why you tried to run us down?" Rick asked.</p>
+
+<p>The shadow merely stared.</p>
+
+<p>"Talk," Scotty ordered, "or I'll put this spear through you."</p>
+
+<p>The man spoke, and his accent was the soft speech of the island. "No,
+you won't. I could explain running down swimmers by accident, but you
+could never explain putting a spear through a man in a boat. You don't
+want that kind of trouble."</p>
+
+<p>Scotty grinned at the truth of it. "Okay," he said. "Just one thing.
+Don't push us too far. Stay in the water until we're ashore, and don't
+try to overtake us."</p>
+
+<p>"Better heed that advice," Rick warned. "Come on, Scotty. Let's go." He
+put his snorkel in place.</p>
+
+<p>Scotty moved to his side. "Welcome to the hospitable waters of St.
+Thomas," he said. "What say we look up some friendly sharks before we go
+ashore?"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_IV" id="CHAPTER_IV"></a>CHAPTER IV</h2>
+
+<h3>Visitors by Night</h3>
+
+
+<p>Rick and Scotty stood on the pier and watched their erstwhile shadow row
+slowly toward another pier some distance away.</p>
+
+<p>"We probably should have tied him up and called the police," Rick
+remarked.</p>
+
+<p>"It wouldn't have gotten us anything," Scotty disagreed. "He could
+always claim he didn't see us in the water. After all, it wouldn't be
+the first time divers had been run over by motorboats."</p>
+
+<p>"It's too late now, anyway. Let's dress, then go to the hotel and tell
+Zircon and Tony about this."</p>
+
+<p>As they dressed in the small cabin of the <i>Water Witch</i>, Rick spoke
+aloud the question that had been bothering him. "What did he have to
+gain by running us down? That's what puzzles me. It was a stupid thing
+to try, because he didn't really have much chance of getting both of us,
+or even one, once he failed to catch us by surprise."</p>
+
+<p>"He wasn't very well prepared for murder, either," Scotty added. "No
+weapons except a switch knife."</p>
+
+<p>Rick nodded agreement. "He was desperate," he concluded. "Suddenly he
+had to take a chance on getting us. He must have known it wasn't much of
+a chance. Either he lost his head, or he wasn't very bright. What could
+have made him try?"</p>
+
+<p>Scotty had no answer, nor could Rick even hazard a reasonable guess.</p>
+
+<p>They locked the cabin of the <i>Water Witch</i>, walked into town, and found
+a taxi. Their shadow did not show up again, and if a new tail had
+replaced him, the new one was too good to be spotted. However, the boys
+doubted that they were being followed.</p>
+
+<p>"I just don't get it," Rick said for the twentieth time. "Our friend
+must have lost his head. Otherwise he'd have waited on shore and
+continued to follow us when we came out of the water."</p>
+
+<p>"We'll probably never know," Scotty returned. "After all, we'll be gone
+in the morning."</p>
+
+<p>"I know. But meanwhile, we'd better have eyes in the back of our heads."</p>
+
+<p>The taxi discharged them in front of Alexander's Rest and they climbed
+out and surveyed the hotel with interest.</p>
+
+<p>Scotty spoke first. "Alexander's Rest? Which Alexander? The Great, or
+Hamilton? If it was Hamilton, as Dr. Ernst said, he must have built it
+personally."</p>
+
+<p>It was a two-story frame structure that had definitely seen better days.
+On closer inspection Rick decided that the second story had been added
+as an afterthought. It looked like the second layer of a poorly
+constructed cake.</p>
+
+<p>Inside, however, the hotel proved to be very comfortable. It was cool,
+and the rooms were large and clean. The boys learned that they had been
+registered in a twin bedroom on the second floor, while Zircon and
+Briotti were on the first floor.</p>
+
+<p>The boys found the scientists attired only in shorts, cooling off over
+long, cold drinks. They accepted glasses of iced ginger ale and told the
+scientists of their adventure.</p>
+
+<p>"It's amazing." Tony Briotti shook his head. "Do you realize that you
+two are a phenomenon? I should write you up for one of the scientific
+journals."</p>
+
+<p>"You mean because we turned the tables on the shadow?" Scotty asked.</p>
+
+<p>"No. Because you're adventure-prone. Did you ever hear of people who are
+accident-prone?"</p>
+
+<p>Zircon chuckled. "A good observation of these two. I agree absolutely,
+Tony. They are adventure-prone."</p>
+
+<p>Rick sighed. "All right. What's the joke?"</p>
+
+<p>"None. I'm quite serious." Tony found more ice for his glass. "Insurance
+statistics show that certain people are accident-prone. Accidents happen
+to them. They're going along minding their own business and bang! A
+streetcar jumps the tracks and hits them. Or they step into open
+manholes. They're the kind of people who always manage to be walking
+under things when workmen drop tools."</p>
+
+<p>"And you," Zircon concluded, "are adventure-prone in the same way.
+Consider this. Had you walked down the street either a minute earlier or
+later this morning you would not have seen Steve Ames. It's quite likely
+that you would never have known of his presence in town. But what
+happens? You walk right into an adventure. One thing leads to another,
+and suddenly a stranger is trying to run you down with a motorboat."</p>
+
+<p>"That's what bothers me," Rick replied. "There's no pattern. It just
+makes no sense."</p>
+
+<p>"It doesn't have to," Tony Briotti said with a grin. "The Golden Skull
+pattern makes no sense, either. But you got us into more excitement than
+I knew was possible. You're just adventure-prone."</p>
+
+<p>"And for the sake of my gray hair, stay out of trouble," Zircon pleaded.
+"Stay close to us until we get to Clipper Cay."</p>
+
+<p>"It will be a pleasure," Rick assured him. "Only let us out of your
+sight long enough to shower, please. I'm sticky."</p>
+
+<p>"We'll stay in the hotel," Scotty promised.</p>
+
+<p>"Fine. I'll feel better about it if I know where you are. Suppose you
+come by in an hour and we'll have a quiet dinner at the Ernsts'."</p>
+
+<p>Dinner was quiet but interesting. The Ernsts were excellent hosts, and
+both Dr. and Mrs. Ernst had many tales of the islands to tell. As the
+good doctor had promised, the boys enjoyed the wonderful variety of sea
+life Mrs. Ernst had collected to keep in salt-water tanks. She
+identified for them a number of the smaller reef fishes, including
+clowns, demoiselles, and even the deadly scorpion fish.</p>
+
+<p>The party broke up early, since the start for Clipper Cay was to be made
+at dawn by the scientists. The plan was for Zircon and Tony to make the
+trip in the <i>Water Witch</i>, with the boys flying over in the Sky Wagon.
+That way, both the plane and boat would be available. Zircon thought
+that fast trips to St. Thomas might be necessary to replenish supplies,
+and he added that he would be happier if the plane were available in
+case of accident. That way, the patient could be in Charlotte Amalie in
+a short time.</p>
+
+<p>As the boys bade good night to the scientists and started up the stairs
+to their room, Rick asked, "Any sign of a shadow tonight?"</p>
+
+<p>"Nope. Guess Steve's friends&mdash;or enemies&mdash;must have lost interest."</p>
+
+<p>"I hope that you're right. As long as Steve ordered us to stay out of
+the case, I'll be glad when we get to the cay and get underwater. We
+have to find that precious gadget even if it takes two solid weeks of
+diving. If we don't, Barby will never let us forget it."</p>
+
+<p>This last was uttered as Rick turned the key in the lock and pushed the
+door open. He flicked on the light, then gave a sudden gasp.</p>
+
+<p>The shadow and a stranger&mdash;in their room!</p>
+
+<p>The boys looked into the muzzles of .38-caliber pistols.</p>
+
+<p>"Come on in quietly," the stranger said. "Put your hands on the tops of
+your heads and sit down on the bed over there."</p>
+
+<p>The boys did so. They had no alternative. Rick's mind raced. Somehow
+they had to warn the scientists, and they had to get out from under the
+muzzles of the guns! What could these men want of them?</p>
+
+<p>The stranger sat down on the other bed. His pistol muzzle was centered
+precisely on Rick's belt buckle. "We want information. Give it to us
+without any trouble and we'll go away. Give us a hard time and you'll
+regret it."</p>
+
+<p>Rick studied the stranger. He was of medium height, dressed in tan
+slacks and sport shirt with a darker jacket. His face was ordinary. He
+might have been a store clerk, or streetcar conductor, or nearly
+anything. But Rick saw from the way his jacket fitted that he was
+powerfully built for his size, and his hands were lean and
+strong-looking. He had a heavy tan, as though he had spent many months
+in the sun.</p>
+
+<p>"What do you want to know?" Scotty asked.</p>
+
+<p>"Let's start with what you were saying when you walked in. Who is
+Barby?"</p>
+
+<p>"My sister," Rick said. "She's at home, in New Jersey."</p>
+
+<p>The stranger sighed. "I was afraid of this. Give us straight answers or
+you'll buy plenty of grief. Now, who is Barby? Who does he represent?"</p>
+
+<p>"He told you," Scotty answered. "She's his sister."</p>
+
+<p>The stranger tried a different tack. "How did you know where to swim
+today? Did Ames tell you?"</p>
+
+<p>"No," Rick replied. "We just swam straight out from the pier looking for
+coral heads."</p>
+
+<p>"Come on! You must have had some source of information. Who gave it to
+you?"</p>
+
+<p>"We didn't have any source of information," Scotty protested. "We just
+went for a swim!"</p>
+
+<p>The stranger lifted the pistol menacingly. "You'd better sing, and it
+better be straight. I'm warning you!"</p>
+
+<p>"Warn all you like," Rick said angrily. "What do you want us to say?"</p>
+
+<p>The shadow walked over and pulled back his fist.</p>
+
+<p>"Lay off!" the stranger growled. "You've pulled enough stupid stunts for
+one day. You'll be lucky if the boss doesn't rip the hide off you."</p>
+
+<p>The former tail subsided and glared at the boys.</p>
+
+<p>The stranger rose. "All right. If you won't talk here, we'll take you
+where you will talk. Get up."</p>
+
+<p>The boys looked at each other. Scotty raised his eyebrows. Rick grinned.
+He asked calmly, "Suppose we don't go?"</p>
+
+<p>"You'll go!" the stranger snapped.</p>
+
+<p>"I don't think we will," Scotty answered. "Look, mister. You're in a
+hotel. It's early, and there are people in the lobby. How far do you
+think you'd get if you tried to march us downstairs with a gun in your
+hand?"</p>
+
+<p>"We're not going through the lobby," the stranger told them. "We're
+going the way we came&mdash;through the window. And you'll go quietly or
+we'll take our chances. They might catch us, but you wouldn't care with
+a couple of slugs in you. Pete, go outside and wait. They'll come down
+one at a time. Keep them covered, and don't hesitate to shoot if they
+try anything."</p>
+
+<p>The shadow slipped through the window, hung by his hands, and dropped.</p>
+
+<p>The stranger's gun singled out Rick. "Get going."</p>
+
+<p>Rick shrugged. There was nothing else to do but obey&mdash;at least for the
+moment. He looked at Scotty, and his pal made a small gesture to the
+right. Rick's forehead wrinkled. This was no signal he recognized,
+unless Scotty meant to jump to the right.</p>
+
+<p>He swung a leg over the sill and looked down. The shadow was waiting,
+and the light from the window glinted dully off the gun in his hand.
+Rick went on out, then holding by his hands he gave a swing to the right
+and dropped. The gun covered him as he rose to his feet again.</p>
+
+<p>"Against the wall!" the shadow hissed.</p>
+
+<p>Rick dutifully moved back against the wall. The shadow was standing
+about six feet away.</p>
+
+<p>Overhead, Scotty was climbing through the window now. Rick watched
+carefully as his pal lowered himself to full length, and swung <i>to the
+left</i>.</p>
+
+<p>Instantly Rick divined Scotty's tactics. If the two boys were apart, the
+gun couldn't cover both of them at the same moment, and there would be
+an instant while the stranger jumped when only a single gun would be on
+them. And the shadow had already shown that he wasn't the smartest man
+in the world. Rick slipped to the right a step or two while the shadow
+was distracted by Scotty's jump. Scotty fell to his knees, and in
+getting up he managed to put a few more feet between himself and Rick.</p>
+
+<p>"Watch 'em!" The stranger's voice floated down. Rick glanced up and saw
+the stranger with one leg over the sill. He tensed.</p>
+
+<p>Scotty said, "Listen, you mug ..."</p>
+
+<p>The shadow's head turned toward Scotty, and Rick left the ground in a
+wild spring. He struck the shadow, hand clawing for the gun. He found a
+wrist, and twisted, falling backward as he did so. The shadow, the
+entire weight of his own body on his wrist from the throw, screamed!</p>
+
+<p>The gun landed on the ground. Rick let go and scrambled for it, but
+Scotty was there before him.</p>
+
+<p>In the instant of the struggle the stranger had hesitated on the window
+sill, hand grabbing for the pistol he had tucked in his belt. He pulled
+it free and aimed at the struggling figures below, but in the gloom
+there was no way to distinguish friend from foe. And in that heartbeat,
+Scotty picked up the shadow's gun and fired one snap shot.</p>
+
+<p>The stranger's gun dropped to the ground and he fell backward into the
+room.</p>
+
+<p>Scotty thrust the pistol into the shadow's stomach. "Face the wall," he
+ordered. "Put your hands against it. Now support your weight on your
+hands."</p>
+
+<p>The shadow did as ordered. Rick took the man's legs and pulled them
+backward so that the shadow's whole weight was against his hands, his
+outstretched body forming the hypotenuse of a right triangle. The only
+way he could move to regain his balance was to lower himself to the
+ground and then get up.</p>
+
+<p>Rick picked up the stranger's fallen pistol and hefted it. "Better see
+about the one upstairs," he advised. "I'll watch this one."</p>
+
+<p>"I fired at his hand, but I was high," Scotty told him. "He got it in
+the shoulder. He won't get far."</p>
+
+<p>Zircon and Briotti charged around the corner of the hotel in pajamas and
+slippers, followed by other guests and members of the hotel staff.</p>
+
+<p>"We had a little trouble," Rick explained briefly.</p>
+
+<p>The scientists took in the situation at a glance.</p>
+
+<p>"As I said," Tony Briotti muttered. "Adventure-prone. And lucky! How do
+you beat a combination like that?"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_V" id="CHAPTER_V"></a>CHAPTER V</h2>
+
+<h3>The Warning</h3>
+
+
+<p>Steve Ames walked into the hotel dining room accompanied by a young Navy
+lieutenant. He spotted the boys immediately and waved.</p>
+
+<p>Rick breathed a sigh of relief. "There he is."</p>
+
+<p>"We can turn this whole business over to him and then get out of here,"
+Scotty returned.</p>
+
+<p>The events of the night before had culminated in two phone calls, one by
+the hotel manager to the police, the other by Rick to Steve Ames.
+However, the duty officer at the UDT base had replied that Ames was not
+available. Rick had then asked for intelligence, and his query had
+gotten fast results. Steve Ames didn't show up, but Navy Shore Patrol
+officers did. The SP's had conferred with the local police, and the
+affair had ended with the shadow and the stranger, whom Scotty had
+potted in the shoulder, being carried off by both groups. First,
+however, the senior Shore Patrol officer had listened to their story,
+then instructed the boys, "Wait for Steve Ames. Talk to no one else. The
+police won't ask any questions."</p>
+
+<p>After conferring, the Spindrift group decided to go ahead with their
+plans. The scientists were anxious to transfer their activities to
+Clipper Cay, not only to get on with their vacation, but to get the boys
+away from the mysterious danger that dogged their footsteps in Charlotte
+Amalie.</p>
+
+<p>The scientists had departed at dawn in the <i>Water Witch</i>, after
+extracting a promise from Rick and Scotty that they would not stir from
+the hotel until Steve Ames contacted them, and that they would then fly
+at once to Clipper Cay.</p>
+
+<p>The wait had been a long one. It was now nearly noon, and the boys,
+hungry because their breakfast had been at daybreak, were ordering
+lunch.</p>
+
+<p>Steve Ames sat down and motioned the lieutenant to a seat. "Jimmy, this
+is Rick Brant and Don Scott. Boys, Lieutenant Kelly. Have you ordered
+lunch?"</p>
+
+<p>"We were just looking over the menu," Rick replied.</p>
+
+<p>"Fine. We'll join you."</p>
+
+<p>The four consulted menus, then ordered. Steve turned to Kelly. "Jimmy,
+being the athletic type, you've probably never heard of the Spindrift
+Scientific Foundation."</p>
+
+<p>The lieutenant, a heavily tanned young man with crisp black hair, shook
+his head. "Sorry. I never have."</p>
+
+<p>"Well, it's a reputable, highly competent and conservative group of some
+of the best scientific brains in the country. But somehow, these two got
+attached to it. They're not very conservative, although they're
+competent&mdash;especially at getting into trouble."</p>
+
+<p>Kelly gave the boys a comradely grin. "If he talks that way, he must
+like you."</p>
+
+<p>The boys grinned back. The lieutenant was likable.</p>
+
+<p>"All right. Last I saw of you two, Rick was lying across the legs of the
+guy who had been tailing me. The next thing I heard, two men we've been
+keeping an eye on were in the hoosegow, one with a slug in his shoulder.
+And I also heard some wild tales of jumping out of windows. Now fill in
+the details."</p>
+
+<p>Rick started from the moment they first noticed that a shadow had picked
+them up. He told the story in careful and accurate detail, knowing that
+Steve's trained mind might find significance in things that meant
+nothing to him. Now and then Scotty elaborated on a point.</p>
+
+<p>When Rick concluded the recital, Steve cupped his chin in one hand and
+stared at them thoughtfully.</p>
+
+<p>Kelly complimented them. "Sounds as if you took care of things like real
+professionals, both in the water and in the hotel. And I must say, I
+wish my people would learn to give reports like that."</p>
+
+<p>The boys thanked him, and Scotty added, "I don't suppose you can tell us
+anything about what you do?"</p>
+
+<p>"Sure I can. I'm not one of Steve's hush-hush crew. I'm a simple Navy
+lieutenant."</p>
+
+<p>Rick chuckled. "In other words, you can't tell us."</p>
+
+<p>Steve said, "He's executive officer of the UDT group here. And he's
+group intelligence officer. I might also add that he's brighter than he
+looks."</p>
+
+<p>"Then what do you make of this business?" Scotty inquired.</p>
+
+<p>"I'm not that bright," Kelly replied. "Seriously, this one has me
+stumped. First of all, it's easy to understand why a shadow picked you
+up. After all, it must have been obvious that you knocked Steve's tail
+off. So they simply picked you up instead, hoping that you'd lead them
+back to Steve, or that you might be important in some way they couldn't
+understand."</p>
+
+<p>"It's nice to have someone do my thinking for me," Steve said. "Carry
+on, Lieutenant."</p>
+
+<p>"Aye, aye, Sir. The tail stuck with you. When your party split in two,
+he decided to stay with you instead of Zircon and Briotti. There could
+be two reasons: First, you were the ones who contacted Steve on the
+street. Second, you stayed at the waterfront while the others went off
+in a taxi. I like the second reason better because of what happened
+later. How about you, Steve?"</p>
+
+<p>"I'm with you. Go ahead."</p>
+
+<p>"Well, at this point I get lost. You put on your gear and swam out, not
+with any particular destination in mind, but looking for a rock or a
+coral head or something of the kind where you could see fish. The shadow
+watched you. Suddenly he got excited, grabbed a boat, and tried to run
+you down."</p>
+
+<p>Steve grinned at the boys. "In fact, he got so excited that he stole a
+boat right out from under the owner's nose. What do you think of that?"</p>
+
+<p>Rick scratched his head. "We'd about decided he was either desperate or
+stupid. I guess he was both."</p>
+
+<p>Kelly continued. "The big point is, what made him desperate? It could
+only have been one thing, as I see it. You were getting close to
+something, and he was afraid you'd find it. So he lost his head. That's
+borne out by the remark his pal made last night, that he'd pulled enough
+stupid stunts for one day."</p>
+
+<p>"But what could we have been getting close to?"</p>
+
+<p>"I don't know. Whatever it was, it isn't there now."</p>
+
+<p>Scotty and Rick sat up straight. Scotty demanded, "How do you know?"</p>
+
+<p>Steve smiled. "Because a team of Navy frogmen went over the entire area
+inch by inch this morning."</p>
+
+<p>At the boys' surprised looks, Kelly explained, "You told the Shore
+Patrol enough to get us interested. We put teams in the water at
+daylight. There's nothing there."</p>
+
+<p>"But there could have been," Scotty pointed out. "If they suspected we
+knew about it, they could have removed it yesterday afternoon or last
+night."</p>
+
+<p>"Correct," Steve agreed. "They were worried, too. Otherwise why the call
+on you last night? And the questions?" Steve paused while the waiter
+served them. "The conclusion is this: Something they value was in the
+water near where you swam. You met me yesterday morning, and they had
+already identified me. Which means that they must have agents in
+Washington who warned them JANIG was moving in on the case. Since it's
+no secret that I'm with the outfit, they could peg me easily. When you
+swam out toward this object, whatever it was, they were convinced that
+somehow JANIG had learned about it. The tail got desperate and tried to
+knock you off. Then, last night, they tried to find out what you knew,
+and how."</p>
+
+<p>"Who are 'they'?" Rick asked.</p>
+
+<p>"If I knew that, I'd wrap the case up and go home. Jimmy has been
+working on it for a week, but he hasn't any answers yet. I've been here
+twenty-four hours, and I know even less."</p>
+
+<p>"Could you identify the two men?" Scotty queried.</p>
+
+<p>"Yes. Both small fry, both local. And both are obviously green at this
+kind of business, otherwise you'd be a pair of real cold turkeys by
+now."</p>
+
+<p>That was true, Rick knew. Experienced agents wouldn't have given him and
+Scotty the chances that they'd seized.</p>
+
+<p>"The men must know what was under the water," Scotty said.</p>
+
+<p>"Not necessarily. They just knew it was important, and they may have
+been ordered to protect it. But your former shadow was on the griddle
+all night, and told all he knew. It wasn't much. He didn't even know who
+had hired him. He wasn't stalling, either."</p>
+
+<p>"What's the next step?" Rick wanted to know.</p>
+
+<p>"Jimmy and I will drive you to the plane. Then you take off for Clipper
+Cay. And stay there until your vacation is over. Have you a short-wave
+radio, by the way?"</p>
+
+<p>"Yes. Why?" Rick had an all-wave battery portable.</p>
+
+<p>"Monitor the Navy command frequency. Here, I'll write it down for you.
+Listen every night at six for five minutes. If I want you, I'll send a
+message. I don't think I will, but it won't do any harm to set up a
+schedule."</p>
+
+<p>Steve lowered his voice. "Now listen to me. This thing is big. The two
+you ran up against yesterday were not good samples. We're dealing with
+some tough professionals. I don't know who they are, but from what I've
+seen I can tell you they're dangerous. So you two are to stay out of
+this case. That is an order. Stay on Clipper Cay and have fun."</p>
+
+<p>"I can add a small note to that," Lieutenant Kelly said. "I'm new here.
+I was ordered down from Norfolk only a week ago. A first-class
+intelligence officer had my job. He turned up in a hospital in the
+British Virgins after being missing for two days. He had a fractured
+skull. He still doesn't know what happened to him, and neither do we."</p>
+
+<p>"Okay," Steve said flatly. "I appreciate the way you handled things
+yesterday, but that's the end so far as you are concerned. Get out, and
+stay out! And that's final!"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_VI" id="CHAPTER_VI"></a>CHAPTER VI</h2>
+
+<h3>The Deadly Tank</h3>
+
+
+<p>The Sky Wagon droned smoothly through a series of figure eights as Rick
+and Scotty inspected every inch of Clipper Cay and its surrounding
+waters. While Rick flew, Scotty marked off landmarks on the chart of the
+island that Dr. Ernst had provided.</p>
+
+<p>"I wish we could spot the wreck of the <i>Maiden Hand</i>," Scotty remarked.</p>
+
+<p>"Too deep," Rick said. "We can't see bottom at twenty fathoms even in
+water as clear as this."</p>
+
+<p>"I've got everything important marked. What say we land and look over
+our property?"</p>
+
+<p>"Okay. I'll shoot the beach while you look for coral heads. We don't
+want to snag a pontoon."</p>
+
+<p>The boys had already identified their house. It was set at the edge of
+the palms, about fifty yards inland from the beach. It looked fine.
+There was a small dock to which the <i>Water Witch</i> could be tied up when
+the scientists arrived.</p>
+
+<p>Rick estimated that Tony and Zircon would arrive about sundown, two
+hours hence. The boys had flown over the <i>Water Witch</i> en route from St.
+Thomas. Apparently the scientists were enjoying the trip. Zircon had
+been sprawled in the cockpit while Tony trolled for fish.</p>
+
+<p>"I'm a little surprised there wasn't something wrong with the plane,"
+Rick observed. He and Scotty had gone over the Sky Wagon from propeller
+hub to rudder, fearful that the unknown enemy might have sabotaged the
+plane. But there was no sign of any tampering. However, the inspection
+had taken so long that it was late afternoon before they got away. It
+was significant and perhaps a little ominous that Steve and Jimmy Kelly
+had assigned a pair of husky Shore Patrol men with .45-caliber sidearms
+to stay with them until the plane actually took off.</p>
+
+<p>"Maybe the two men who came after us were acting without orders," Scotty
+replied. "Maybe the real brains of the gang aren't even interested in
+us."</p>
+
+<p>"I hope that you're right. See any coral heads?"</p>
+
+<p>Although most coral growth was limited to the reef area, outcroppings of
+coral called "heads" had grown up toward the surface in some places.
+There were none in the stretch of water before the beach house where
+Rick planned to land.</p>
+
+<p>"The water's clear. Pick your direction. There's not enough wind to make
+any difference."</p>
+
+<p>"I'll land parallel to the beach."</p>
+
+<p>Rick turned south down the center of the island. When he had reached the
+right position he cut the throttle, and the nose of the Sky Wagon
+dropped. He banked tightly, reversing course, until the plane was headed
+north a hundred yards out from the beach. He let the plane feel its way
+toward the water, then felt the first bump as the pontoons touched. In a
+moment they were down, and Rick swung the plane to taxi in toward their
+new home.</p>
+
+<p>Scotty was already stripping off his shoes and socks. As the pontoons
+touched bottom a few yards from shore, Scotty climbed out. Rick cut the
+gun while his pal pulled the plane up on the beach.</p>
+
+<p>Rick got out and waited until Scotty slipped his shoes on again, then
+they walked to the cottage.</p>
+
+<p>The door was unlocked. Few people came to Clipper Cay, and locks weren't
+considered necessary. The boys pushed open the front door and walked in.</p>
+
+<p>There was a large living room and three bedrooms, each with twin beds.
+In the rear of the cottage was a kitchen with kerosene stove and
+kerosene refrigerator. A fifty-gallon drum out back provided the fuel
+supply, which was piped in through copper tubing. Rick checked the fuel.
+The tank was full. He read the simple instructions tacked to the wall
+over the refrigerator, then lighted the burner. There were frozen foods
+and soft drinks as well as dairy products among their supplies, packed
+in dry ice in the <i>Water Witch's</i> food locker; the refrigerator would be
+cold enough for the supplies by the time the boat arrived.</p>
+
+<p>For bathing in fresh water there was an outdoor shower, a shower head
+rigged to a five-gallon drum and supported on a frame of two-by-four
+wooden members. A canvas curtain gave privacy. Other sanitary facilities
+were equally primitive but effective.</p>
+
+<p>Scotty opened the door of a lean-to shed on the rear of the house. "We
+can stow our diving gear in here. There's a bench, too. Looks as though
+the owner used the place for cleaning fish and stowing his fishing
+equipment."</p>
+
+<p>They walked around to the front of the house where there was a small
+porch. A few wicker chairs were upended against the wall. The boys
+righted them and sat down.</p>
+
+<p>"This is the life," Rick observed. "Look at that view."</p>
+
+<p>They looked from the porch down to the sandy beach, past the pier and
+the Sky Wagon to water that was almost glassy calm. The water continued
+in a smooth stretch for about five hundred yards out to the reef. Light
+breakers foamed along the reef, and beyond, the water was a blue waste
+to the horizon. A quarter mile south, a break in the reef marked a
+passage where boats could enter.</p>
+
+<p>Somewhere, out beyond the reef, was the wreck of the <i>Maiden Hand</i>. In
+his mind, Rick planned how they would go about finding it. The first
+step was to rig some kind of underwater towing boards. Then he and
+Scotty, equipped with their aqualungs, would be towed behind the <i>Water
+Witch</i>, scanning the bottom as they went.</p>
+
+<p>He wasn't worried about finding material for the towing boards. Any kind
+of planks would do, or they could even make a tow board out of a fallen
+log, although that would be harder to control.</p>
+
+<p>"Come on," he invited. "Let's walk through the palms. We need a few
+planks, and we might as well get them now."</p>
+
+<p>By the time the scientists approached the pier, the boys had explored
+the central part of the island and had returned to the cottage lugging
+planks found in the ruin of a cottage apparently blown down by some
+long-past hurricane. They dropped the planks beside the house and
+hurried to catch the line that Zircon threw, then they warped the <i>Water
+Witch</i> in to the dock.</p>
+
+<p>All hands turned to, and in a short time supplies were unloaded and
+stored, beds were made with linen and blankets loaned by Dr. Ernst, and
+the cottage began to take on an inhabited look.</p>
+
+<p>While Tony Briotti began preparations for dinner, the boys carried their
+aqualung equipment to the shed at the rear of the cottage and began to
+check it over. Since their lives would depend on proper functioning of
+the equipment, they inspected the regulators carefully, checking the
+condition of the neoprene flaps. Once checked, the regulators were hung
+on nails on the shed walls, out of harm's way.</p>
+
+<p>The next step was to inspect the tanks. Rick had already looked them
+over, but for the sake of safety the boys did it again. There were six
+of them, each of seventy-cubic-feet capacity. There was an advantage to
+this particular capacity at the depth where they expected to dive; a
+diver could work only fifteen minutes at 120 feet without requiring
+decompression, and seventy cubic feet of air would last just long
+enough. Double tanks would have meant the boys would be able to stay
+down nearly twice as long, but would also have meant the nuisance of
+waiting through the decompression period of about thirteen minutes ten
+feet below the surface on the ascent. For this reason, the boys planned
+to dive with single tanks, leaving the spares on the surface.</p>
+
+<p>Of course, to get even fifteen minutes of diving at twenty fathoms the
+tanks had to be filled to capacity. When full, they were under enormous
+internal pressure of over two thousand pounds per square inch. The tanks
+had been filled at Spindrift, but the boys decided to check them again,
+in case there had been some leakage through the valves during shipment.</p>
+
+<p>Scotty swung one tank upright and prepared to attach the pressure gauge.
+Rick, inspecting another tank for bumps that might have weakened the
+tank wall, saw him do it.</p>
+
+<p>For a moment Rick continued his inspection, then what he had seen
+suddenly registered. He yelled, "Scotty! The valve!"</p>
+
+<p>In that instant, as Scotty attached the pressure gauge, the valve blew
+out!</p>
+
+<p>The entire valve assembly and the pressure gauge, propelled by the
+tremendous pressure in the tank, blew straight upward, ripping clear of
+Scotty's hand and taking a patch of skin along. The ascending assembly,
+traveling with bullet speed, clipped a lock of hair from his bent head.</p>
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="illus3" id="illus3"></a>
+<img src="images/illus3.jpg" alt=""/>
+</div>
+
+<h3><i>The valve assembly, traveling with bullet speed, barely missed Scotty's head</i></h3>
+<hr style="width: 65%;" />
+
+<p>Scotty yelled, "Run!"</p>
+
+<p>The tank, its air free to escape, writhed and turned, then fell over on
+its side. It was like an inflated balloon, turned loose to fly around a
+room. Air jetted from it with terrific velocity, so that the tank was,
+for the period while its air lasted, a true rocket.</p>
+
+<p>It struck the wall of the shed and went through it like paper, smashed
+into a stud and caromed slightly, so that its trajectory was altered
+enough to drive it directly at Rick. He fell flat and it went over, just
+grazing him, then flew into the palm grove. It hit a palm a slanting
+blow and turned upward, shooting high in the air, clipping off the top
+of another palm as it went.</p>
+
+<p>As the boys watched, horrified, it climbed straight up. Then, its high
+pressure nearly exhausted, it turned leisurely and plunged back into the
+grove, almost burying itself in the sandy soil.</p>
+
+<p>The boys sat down and stared weakly at each other. For the first time,
+Rick noted that Scotty's hand was bleeding. He said shakily, "Here, let
+me look at that."</p>
+
+<p>The scientists rushed out of the house and demanded to know what had
+happened. The tank had blown through its devastating course so fast that
+they had not even had time to get outdoors.</p>
+
+<p>Zircon bandaged Scotty's hand with supplies from the first-aid kit while
+the boys told them what had happened. Tony said, "Very careless, leaving
+a valve loose like that."</p>
+
+<p>Rick told him positively, "It wasn't left unscrewed, Tony. We always use
+a wrench on those valves because high pressure is so dangerous. And it
+wasn't like that yesterday. I checked the tanks when we stowed them on
+the boat."</p>
+
+<p>Scotty gestured toward the other tanks. "Better take a look."</p>
+
+<p>Rick did so, and gave a low whistle. The valves had all been loosened.
+They were in place only by a turn or two of the threads.</p>
+
+<p>"They could have come out any time," he said grimly. "Any rough handling
+could have knocked a valve out. And if it had happened on the boat, the
+tank would have gone right through the bottom or side. It was just luck
+Scotty and I weren't killed."</p>
+
+<p>Zircon wordlessly found the valve wrench and got to work screwing the
+assemblies back in place. The others watched silently, until Scotty
+said, "Well, at least we're out of St. Thomas. There won't be any more
+sabotage!"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_VII" id="CHAPTER_VII"></a>CHAPTER VII</h2>
+
+<h3>The Derelict</h3>
+
+
+<p>Rick and Scotty were up at dawn the next morning. They didn't bother
+with anything so prosaic as breakfast. Instead, they collected masks,
+snorkels, and flippers for a preliminary dip. They didn't use the lungs;
+those were to be saved for more important work than casual swimming.</p>
+
+<p>For this first swim, each boy selected a spear gun. Scotty chose the
+same light spring gun he had used to save them from the shadow, while
+Rick took his favorite gun, a four-strand rubber-powered weapon that
+packed a terrific wallop. They belted on their knives and blew up their
+plastic floats. These were essential for resting, if necessary, and for
+bringing home their catch, if any. Once a fish was speared, it was
+important to get it out of the water as soon as possible, since blood
+would bring sharks or barracuda if any were in the neighborhood.</p>
+
+<p>"Come on," Rick said impatiently. "Let's go."</p>
+
+<p>"I'm coming." Scotty finished coiling up the light line he used to
+tether the float to his belt, and they stepped into the water. The
+temperature was just right. They ducked under, then put on their
+equipment. Scotty pulled a rubber glove over his injured hand. Pushing
+their floats ahead of them, faces down in the water, they started for
+the reef.</p>
+
+<p>Rick watched the bottom carefully. It was clear sand, with no sign of
+life other than an occasional conch or other shellfish. This was to be
+expected, since marine life tended to collect around reefs, rocks,
+pilings, wrecks, and similar things. As they approached the reef, coral
+heads and outcroppings began to appear. And with them, fish.</p>
+
+<p>Rick hooted for Scotty's attention, then lifted his head and let his
+mouthpiece fall free. "Let's go outside!" he called as Scotty looked up.
+The other boy nodded agreement. Both were anxious to examine the reef.</p>
+
+<p>The surf was light. They crossed over the reef by towing their floats
+and timing their movements through the breakers. Once beyond the point
+where the waves broke, the water was fairly calm, with only light surges
+from the passing waves.</p>
+
+<p>Rick looked down and saw the reef drop away under him. It shelved off
+perhaps twenty feet down, then beyond the shelf it fell away into the
+depths. He looked into the blueness with a stirring of excitement. To
+find the <i>Maiden Hand</i>, they would have to swim into that mysterious
+blue realm.</p>
+
+<p>Scotty hooted. Rick looked, and followed the direction of his pointing
+arm. There, browsing around the shelf below, was a handsome red snapper,
+perhaps fifteen inches long. They had stopped in Miami and Rick had
+noticed that red-snapper prices were about the same as those for steak.
+There was no doubt that the fish was very good eating. He gestured to
+Scotty to go after it, then floated motionless, watching.</p>
+
+<p>Scotty put the loader over the tip of his spear and pushed down, cocking
+the gun. Then, without a splash, he slid under the water. Rick watched
+as his fins propelled him slowly toward the snapper. Scotty was moving
+slowly, because this was the prime rule in underwater hunting. As he
+swam, he extended the spear gun, aiming over the short barrel. The
+snapper stopped browsing and his dorsal fin suddenly erected, a sign of
+alarm. But he didn't move because he was not yet sure the big invader
+was an enemy. Before he could make up his mind, Scotty fired.</p>
+
+<p>The spear took the fish right behind the gills. He gave a quick spurt
+that brought the line humming from its spool. Scotty followed quickly,
+caught the shaft, then sped upward to where Rick waited.</p>
+
+<p>"Good shot," Rick complimented him as Scotty caught his float. Together,
+they took the fish off the shaft and examined him with some pride. Their
+first catch off Clipper Cay was a good one. The snapper was pink and
+firm-fleshed. He would make good eating.</p>
+
+<p>Rick put his face down in the water again while Scotty secured the catch
+to his float. As he did so he saw a target and hooted for attention.
+Scotty joined him and they looked down to where a barracuda hovered
+motionless.</p>
+
+<p>The 'cuda was perhaps two and a half feet long, not big as such
+predators went, but big enough. Scotty motioned to Rick to get him.
+Obviously the fish had been attracted by the blood or the struggles of
+the snapper. Rick hoped that his big brothers wouldn't join him. This
+one was plenty big enough. While Scotty held both floats, Rick charged
+his gun, pulling back the strong rubbers a pair at a time. Then he
+checked his safety line, filled his lungs, and went under.</p>
+
+<p>The barracuda hovered, waiting. Rick knew that his apparent disinterest
+could change to lightning flight. Few fish were so fast. He followed
+Scotty's example, moving slowly toward the quarry. He was a dozen feet
+down now, and in the lessened light the barracuda loomed large, a slim
+arrow of a fish, poised for flight.</p>
+
+<p>The spear gun was extended, the spear point nearing firing range. Rick
+planned to shoot from about six feet. He doubted that he could get
+closer. Flippers propelling him gently, he closed. Now he could see the
+pointed jaws that contained razor-edged teeth. The fish was watching
+him, but without apparent fear.</p>
+
+<p>The barracuda head was squarely in his sights. Rick squeezed the
+trigger.</p>
+
+<p>For a moment he thought he had missed, then the safety line ran out and
+the jerk almost pulled the gun from his hands. He was running out of
+breath, too. Quickly he planed for the surface, feeling the fury on the
+end of his line. He broke water, gulped air, then dove again. He pulled
+in the line until he saw the fish struggling. He had nearly missed. The
+harpoon had taken the barracuda near the tail, fortunately hitting the
+spine. Rick pulled him in, hand over hand, then gripped his spear by the
+extreme end. He had no desire to close with those slashing, dangerous
+jaws. Holding fast to the spear he shot to the surface again. Scotty was
+waiting, knife in hand. As Rick extended the spear toward him the keen
+knife flashed across the 'cuda's spine just behind the gills. Rick
+tossed his gun onto the float, then together they heaved the fish up
+beside it.</p>
+
+<p>"Spindrift was never like this," Scotty said, grinning.</p>
+
+<p>Rick gulped air and grinned back.</p>
+
+<p>A hail from the shore reached them. They turned and saw Tony Briotti. He
+was waving a frying pan in a signal for breakfast. Suddenly Rick
+realized that he was famished.</p>
+
+<p>"Let's go," he said. "We'll trade these for bacon and eggs."</p>
+
+<p>It was nearly noon before they got into the water again. The first part
+of the morning was spent in fashioning sea sleds from the planks the
+boys had gathered. This was simple enough, but it took a little time.
+First the planks were cut to proper length, then two of them were nailed
+together. A bridle was arranged so that they could be towed, and spare
+weight belts and weights were used to counteract their bouyancy. They
+were very much like the aqua-planes commonly towed behind motorboats,
+but much cruder, and designed to go under rather than remain on the
+surface.</p>
+
+<p>Two long ropes were arranged so that a sled could be towed on either
+side of the <i>Water Witch</i>. Once this was done, the boys rechecked their
+equipment, attached the regulators to the tanks, and carried them to the
+beach.</p>
+
+<p>Zircon would pilot the boat, following the 120-foot mark on the chart.
+Tony would act as tender at the stern, while Rick and Scotty would ride
+the sleds. The first leg would take them through the reef channel, then
+south to the tip of the island, reverse course and north again, staying
+at the twenty-fathom mark. Zircon was sure that he would be able to
+follow the prescribed course by judging his distance from the reef.</p>
+
+<p>When all was in readiness, they loaded their gear aboard the <i>Water
+Witch</i>, including the spare tanks. Only the runaway tank was missing,
+and Rick had determined that its wild flight had not weakened it. The
+valve and pressure gauge had been recovered after a considerable search,
+and the tank could be refilled with the others.</p>
+
+<p>Zircon took the <i>Water Witch</i> through the reef, and the boys donned
+their equipment while Tony swung the ladder outboard. Rick checked his
+own straps, and then those of Scotty, while Scotty returned the favor.
+Then each checked the flow of air through his mouthpiece, and made sure
+the reserve rod was in the "up" position. This done, they entered the
+water. Tony tossed the boards over and made sure the lines were secured.</p>
+
+<p>Rick and Scotty paddled the boards to the extreme length of the lines,
+then separated as much as the lines allowed. They were about thirty feet
+apart and a hundred feet behind the boat.</p>
+
+<p>They waved their readiness to Tony, who relayed the go-ahead to Zircon.
+The boat started slowly.</p>
+
+<p>Rick moved forward on his board, and the weighted board tilted down. It
+acted as a hydrofoil, its forward motion pulling it deeper into the
+water. Rick waited until he was only ten feet from the bottom, then
+shifted his weight back again. Obediently the board tilted upward and
+raced for the surface. Rick moved forward again just in time to keep
+from breaking through the surface. By adjusting his weight, he could
+keep the board level, or go up or down. It wasn't easy and he had to
+fight the board level almost constantly.</p>
+
+<p>Bubbles rose from the regulator between his shoulder blades as he
+breathed rhythmically. The lung performed effortlessly, giving him as
+much air as he needed. He felt the pressure on his ears as he steered
+the board toward bottom, and there was an instant of pain before his
+ears adjusted.</p>
+
+<p>The bottom was sandy. To his right he saw the wall of the reef, and once
+a startled snook shot out of his way. To his left he could see Scotty.
+Before he knew it the boat had throttled down, a signal that they were
+at the southern end of the reef. He tilted upward and surfaced.</p>
+
+<p>Tony called, "How is it?"</p>
+
+<p>"Great!" Rick called back. "But we'll need lots more line. It was
+shallow on the way down, but if we try to go any deeper the angle of the
+line will make the boards come up."</p>
+
+<p>"You should try it," Scotty said. "Honestly, Tony, it's wonderful!"</p>
+
+<p>"I'll try it a little later," Tony promised. "I'm giving you all the
+line we have, about three hundred feet each. If you can't make it,
+surface. We'll have to splice the two lines together and use just one
+board."</p>
+
+<p>Zircon came to the stern and bellowed, "You forgot these!"</p>
+
+<p>He tossed in two fishing floats and coils of line. Those were in case
+they found the wreck. Whoever spotted it was to drop off his board,
+secure the line to the wreck, and let the float rise to the surface. In
+that way, they would have a guide.</p>
+
+<p>Each boy took one of the units and fastened it to his weight belt.</p>
+
+<p>"We're off!" Zircon called. "Ready?"</p>
+
+<p>The boys yelled that they were. Rick fitted his mouthpiece and checked
+the seal of his mask. Scotty did the same, then both tilted their boards
+and slid under.</p>
+
+<p>On the northbound leg they had trouble keeping the boards down because
+of the tendency of the lead rope to pull the front of the boards up, but
+by crawling far forward, they managed.</p>
+
+<p>They were deeper than they had ever gone before, but Rick felt no
+sensation of fright or strangeness. It was a green world, not dark but
+yet not bright. The light was subdued, filtered by the fathoms of water.
+The bottom was mostly clear sand, dotted now and then by patches of
+growth. There did not seem to be many fish, or perhaps their eyes were
+not adjusted to the subdued light. Scotty was close to the reef on the
+northbound leg, while Rick was about twenty feet farther out.</p>
+
+<p>For long moments there was only the sensation of rushing through the
+water, the distant throb of the engines, and the sound of their own
+bubbles. Then, ahead, Rick saw a mass of growth and tilted his board
+upward just in time to clear it.</p>
+
+<p>Scotty hooted once, then again. Rick turned in time to see his pal's
+board leap ahead, free of Scotty's weight. Sudden fear gripped him. Had
+Scotty been caught? Instantly he released his own board and saw it scoot
+for the surface. He reversed his course and swam rapidly back.</p>
+
+<p>The obstruction he had cleared was dead ahead. And there were fish! So
+many that they seemed like a swarm of flies around it. The biggest was
+not more than five inches long. Then he saw Scotty. His friend was
+fastening the float line to a projection!</p>
+
+<p>Rick's heart leaped. What he thought was a rock formation on the sea
+floor was the wreck of a ship! Scotty had recognized it and dropped off.
+The <i>Maiden Hand</i>? He hooted and Scotty looked up. The other boy shook
+his head.</p>
+
+<p>It wasn't the <i>Maiden Hand</i>, then. But how did Scotty know? In a moment,
+when he joined the other boy, he saw the curling edges of steel plate.
+This was a steel ship, then, and not a very large one at that. He
+estimated its length as not more than a hundred feet. Still, it was a
+wreck&mdash;their first. There, at twenty fathoms, he and Scotty shook hands
+solemnly while the tiny fish swam around them like curious gnats.</p>
+
+<p>Scotty finished tying his line and unwound it from the wooden spool. The
+float rose upward and vanished far overhead. They heard the throb of the
+returning boat, and Rick hooted twice, the signal to surface. Scotty
+nodded, and they went up, slowly, careful to breathe naturally and not
+to overtake their small bubbles, as doctrine dictated. In a moment Rick
+saw the hull of the boat, propellers barely turning, and knew that
+Zircon was holding position overhead.</p>
+
+<p>They broke water off the side of the <i>Water Witch</i>, and Rick waited
+until Scotty hailed the scientists. "We found a wreck, but it's a steel
+ship."</p>
+
+<p>"Come aboard!" Tony called, and helped them up the ladder when they
+complied. The tanks were cumbersome when out of the water.</p>
+
+<p>"It's a fish paradise!" Rick said excitedly. "I'm going to get my camera
+working and take some pictures. You've got to go down and look, both of
+you."</p>
+
+<p>"How did you spot it?" Zircon asked.</p>
+
+<p>"Scotty did. I thought it was a rock formation and went over it, but
+Scotty dropped off."</p>
+
+<p>"I saw curled plate," Scotty answered. "I knew it wasn't the <i>Maiden
+Hand</i>, with steel sides, but I didn't think we'd want to pass up a
+wreck."</p>
+
+<p>"You were so right," Rick agreed, grinning.</p>
+
+<p>A check of their tanks with the gauge showed that only about five
+minutes diving time remained at the twenty-fathom depth, so the
+regulators were transferred to spare tanks. Tony and Zircon, already in
+trunks, donned diving gear and followed Scotty's line to the bottom. The
+boys waited impatiently, Scotty taking the helm to hold the boat in
+place.</p>
+
+<p>Ten minutes later the scientists surfaced, and Rick helped them aboard.
+Tony removed his mask and grinned. "It's as wonderful as you said it
+was."</p>
+
+<p>"What kind of ship was it?" Rick asked.</p>
+
+<p>Tony had been a destroyer skipper during the war and he knew ships.</p>
+
+<p>"Probably an interisland cargo carrier of some kind. At any rate, it
+appears to be a small cargo ship. It's so overgrown with marine growth
+that the shape is cluttered. It might have been a small tanker."</p>
+
+<p>"We can explore it from stem to stern," Rick suggested excitedly.</p>
+
+<p>Scotty joined them and commented, "But not right now. We'll have to go
+ashore and charge the tanks. There may be time for one more dive this
+afternoon if we hurry."</p>
+
+<p>"Besides," Hobart Zircon said with a smile, "I'm hungry. As you say,
+Rick, diving certainly develops the appetite!"</p>
+
+<p>They docked, and Tony and Zircon went off to see about preparing
+sandwiches. The boys decided that rather than carry the tanks back and
+forth from the pier to the shed, it would be more sensible to bring
+their small, portable gas-driven compressor to the pier.</p>
+
+<p>Scotty went after it while Rick tied the tanks to the afterrail of the
+<i>Water Witch</i>, in position for filling.</p>
+
+<p>A yell from Scotty stopped him. He looked up and saw his friend beckon,
+and ran down the pier to the house. The scientists joined him and Scotty
+at the shed where the compressor had been stored.</p>
+
+<p>"We've been sabotaged again," Scotty told them flatly. "There's oil in
+the compressor!"</p>
+
+<p>"Are you certain?" Zircon pressed close to examine the machine.</p>
+
+<p>"Yes. I stumbled over my own feet and tipped the compressor on its side.
+And oil ran out through the air fitting. Look!" Scotty held up his hand,
+and it was smeared with glistening oil.</p>
+
+<p>A cold shiver traced its way down Rick's spine. Oil in a compressor was
+blown into fine particles, too small to be seen. If they got into an air
+tank they would be breathed in, leaving a thin coating on a diver's
+lungs. The result was a condition almost exactly like pneumonia, called
+"lipoid pneumonia." Their special filter, designed by Zircon, probably
+would have taken all the oil particles out of the air before it got into
+the tanks, but that didn't alter the fact that faced them. Someone had
+deliberately put oil in the compressor. Someone just didn't want them
+around!</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_VIII" id="CHAPTER_VIII"></a>CHAPTER VIII</h2>
+
+<h3>The Fancy Frogmen</h3>
+
+
+<p>"The question is," Rick stated, "when was the oil put in? While we were
+at Charlotte Amalie? Or while we were out hunting the wreck just now?"</p>
+
+<p>"In Charlotte Amalie, of course," Tony said. "Why do you think it might
+have been done just a little while ago?"</p>
+
+<p>Rick shrugged. He had no answer to that. The question had popped into
+his mind unbidden.</p>
+
+<p>"We didn't take the compressor apart," Scotty reminded him.</p>
+
+<p>That was true. But Rick had started it in Charlotte Amalie to be sure it
+was functioning. There was no oil in it then. He said as much.</p>
+
+<p>"You started the compressor at the same time you checked the tanks,"
+Zircon reminded him. "I believe the oil was put in at the same time the
+valves were loosened."</p>
+
+<p>That seemed reasonable. Rick put aside his hunch. "Well, we found it in
+time, anyway. Now Scotty and I will have to tear the compressor down and
+clean it before we can recharge the tanks."</p>
+
+<p>"After lunch," Tony said. "Don't you remember? A diver is supposed to
+rest after each dive. Relax, and I'll have some sandwiches ready in a
+few minutes."</p>
+
+<p>All hands were hungry. Scotty stowed away four sandwiches and Rick did
+nearly as well. Then they started work on the compressor. It wasn't a
+hard job, but it was tedious, and nearly two hours elapsed before they
+finished. Each part had to be washed in soap and water, then carefully
+dried. Finally, the compressor was ready. They carried it to the boat,
+started the gas engine, and connected the tanks. But before the air
+started to flow, Rick carefully inspected the filter system to be sure
+that hadn't been tampered with too.</p>
+
+<p>"You know," he observed, "these enemies Steve is hunting know a lot
+about sport diving."</p>
+
+<p>Scotty considered. "They knew that tanks could be dangerous, and they
+knew that oil in a compressor is dangerous. You're right, Rick. They
+know plenty about it."</p>
+
+<p>"But it doesn't do us much good to know that they know," Rick concluded.
+"Well, now what? It will be a few hours before all the tanks are
+charged."</p>
+
+<p>"Where are Zircon and Tony?"</p>
+
+<p>"Napping. We probably should join them."</p>
+
+<p>"Not me. There's nothing to do after sundown but sleep. I'd like to take
+a walk and look the island over."</p>
+
+<p>Rick sighed. "Always an eager beaver. I'll go with you, if you don't
+walk fast."</p>
+
+<p>They turned north and walked up the beach. Somewhere off this stretch of
+beach was the <i>Maiden Hand</i>. But where? They strolled along leisurely,
+stopping now and then to examine some bit of beach flotsam. There were
+shells, but most of them were small and water worn.</p>
+
+<p>"We'll have to collect a few shells on the reef," Rick said. "Barby will
+be disappointed if we don't."</p>
+
+<p>"That's easy enough to do," Scotty replied. "I saw half a dozen
+different varieties this morning."</p>
+
+<p>They passed a beach house, obviously empty. Rick gestured toward it.
+"Funny how few people there are here. If I owned a place on this island
+I'd be here all the time."</p>
+
+<p>"Unless you had to make a living," Scotty added practically. "This isn't
+the season for vacations. I expect vacation time finds plenty of
+activity here. There's one cabin occupied to the south of us. I saw
+people there this morning. They're probably the same ones who waved at
+us from a boat when we flew over day before yesterday."</p>
+
+<p>"The boat isn't there now," Rick observed. "At least, I haven't seen
+it."</p>
+
+<p>"They may have gone to St. Thomas for supplies. Or they may have gone
+home." Scotty pointed to what seemed to be the largest house on the
+island, near the northern tip. "That's quite a place. Let's go have a
+look."</p>
+
+<p>There was a long pier in front of the house, and, unlike the others on
+the island, this house had a second story. There was no sign of life.
+They walked around it and found a barbecue pit. Scotty examined it.
+"This has been used recently, probably in the past few days."</p>
+
+<p>Rick bent down and peered at a scrap of meat. "You're right. They had
+steak. And this piece hasn't dried out yet."</p>
+
+<p>"Maybe they're still here." Scotty walked to the back of the house.
+"They might be out fishing or something." He looked in a window and
+called urgently, "Rick! Look!"</p>
+
+<p>Rick hurried to his side and peered in. The room was evidently used for
+storing diving equipment. Hung along one wall were three full diving
+suits of expensive make. Next to them, neatly racked, was an assortment
+of spear guns, all of the spring type, and all of Italian make.</p>
+
+<p>On another wall were three Scuba regulators, not aqualung types such as
+the boys used, but the variety that carries a full face mask through
+which the diver breathes. In a rack on the floor were nine spare tanks
+and a compressor much larger and more expensive than theirs.</p>
+
+<p>Swim fins, also of Italian make, were lying on a table. They were the
+shoe type, put on like a pair of slippers. Rick identified an underwater
+camera, complete with steering fins and outside controls, and a number
+of face masks with built-in snorkels. Boxes stacked on the floor carried
+labels that identified them as midseason suits of French make.</p>
+
+<p>"We've found some real fancy frogmen," Scotty observed. "This place
+looks like a high-priced show-room for diving gear."</p>
+
+<p>"Pretty plush," Rick agreed.</p>
+
+<p>They wandered back down to the beach and found that this area of the
+island was apparently more open to the sea. There were bits of flotsam,
+including coconuts that had washed in. The sea shells were larger, and
+they found a few worth picking up.</p>
+
+<p>Scotty beckoned and pointed to a piece of wood, nearly buried in the
+sand. "What do you make of this?"</p>
+
+<p>Rick examined it. It was curved, and a shred of green metal still clung
+to the rusty remains of an ancient hand-fashioned nail. He looked up
+with sudden excitement. "It's a section of a ship rib. And a pretty old
+one, too." His finger indicated the shred of metal. "Copper. Or used to
+be." He broke it off. "Completely oxidized. It's been in the water a
+long time, perhaps even centuries."</p>
+
+<p>The boys stared out at the reef, both half afraid to put their thoughts
+into words. Finally Scotty asked, "Do you remember reading about any
+earthquakes or big tidal waves down here recently?"</p>
+
+<p>Rick tried to recall. "No. Why?"</p>
+
+<p>"Well, the <i>Maiden Hand</i> has been under the water out here for a couple
+of centuries&mdash;and in pretty deep water, too. It would take some
+disturbance that could reach down a hundred and twenty feet to break off
+a chunk."</p>
+
+<p>Rick grinned. "You're right. But we haven't anything to lose by taking a
+look, have we?"</p>
+
+<p>They trotted down the beach toward their own house at a half run. Rick
+looked at his watch. "At least one pair of tanks should be full by now,
+and there's plenty of time for a dive. Come on!"</p>
+
+<p>They paused at the pier, put the pressure gauge on the first two tanks
+in series, and found them charged, as Rick had predicted. Then they ran
+for the house.</p>
+
+<p>Zircon and Tony were gone and there was a note on the living-room table.
+"<i>We're exploring the southern end. Be back in an hour or two.</i>"</p>
+
+<p>"Shall we wait?" Scotty asked.</p>
+
+<p>"No need. We can take our floats. Let's get going."</p>
+
+<p>They changed to trunks. Then, since they would not have anyone on the
+surface to keep track of time or depth, strapped on wrist watches,
+compasses, and wrist depth gauges. Floats and weight belts were put on,
+then the boys added small plastic slates and pencils for writing
+underwater. Knives, masks, snorkels, their favorite guns, fins, and
+lungs completed their equipment.</p>
+
+<p>"Shall we walk up the beach, or swim?"</p>
+
+<p>"Swim," Rick said promptly. "This stuff is too heavy to carry
+comfortably."</p>
+
+<p>They launched floats, placed aqualung mouthpieces on top of their masks,
+and swam parallel to the beach. By using snorkels they avoided the
+effort of lifting their faces out of water to breathe and conserved the
+air in the tanks. With effective but effortless leg strokes they moved
+along rapidly.</p>
+
+<p>As they approached the ship rib that Scotty had found they turned and
+swam straight out toward the reef, crossed it, then came to a halt.</p>
+
+<p>"Let's tie our floats to something," Rick suggested, and Scotty nodded.</p>
+
+<p>Aqualung mouthpieces replaced the snorkels, and each boy tested his flow
+of air, checked to be sure his mask was connected to the lung by a
+safety line, charged his gun, and set his watch. The watches, designed
+especially for underwater swimming, had an outer dial that could be set
+to show elapsed diving time.</p>
+
+<p>Rick hooted and pointed down. Scotty nodded and they submerged. Because
+of their belt weights, and the weight of air in their tanks, they were
+just heavy enough to sink slowly. After the dive, when the air in the
+tanks was nearly exhausted, they would weigh about five pounds less and
+have a slight positive buoyancy that would help them to rise.</p>
+
+<p>They found coral outcroppings and tied their float lines, being careful
+not to cut their hands. Rick suddenly wished they had brought canvas
+gloves. Scotty still wore a single rubber one.</p>
+
+<p>Then, with a few strong kicks to overcome their inertia, they started
+down the face of the reef. It fell off sharply for about forty feet,
+then more gradually until sand bottom was reached at about ninety feet.</p>
+
+<p>Rick felt the sensation of thrusting his face into a wedge as the
+pressure increased. He swallowed a couple of times and felt his ears
+equalize, but his mask was beginning to hurt. He exhaled through his
+nose and equalized the pressure inside the mask.</p>
+
+<p>There were plenty of fish around now. A grouper saw them coming and
+ducked into his hole in the coral. A fairly large moray eel, only his
+head visible, watched their progress. Tiny demoiselles fluttered around
+them, and a pair of red squirrelfish watched from the shelter of a
+purple coral fan.</p>
+
+<p>The coral growth was spectacular, with fantastic shapes and colors.
+Then, as they went deeper, the colors gradually faded to a uniform
+green. Rick knew from underwater flash photographs that the appearance
+was deceptive. The colors remained, but the quality of light changed.</p>
+
+<p>Scotty hooted four times, the signal for danger! Rick looked and saw a
+barracuda hovering near by. He gulped. The fish was easily five feet
+long. Both boys lifted their spear guns just in case the 'cuda attacked,
+but the motion alarmed him and he was gone with one powerful flick of
+his tail.</p>
+
+<p>Rick consulted his wrist depth gauge, holding it close to his face
+plate. They were at bottom at ninety feet, and the clean sand dropped
+away at an angle of about thirty degrees. The boys planed downward, a
+few feet above the sand until Rick's gauge read 120 feet. This was the
+limit of their dive. Going deeper would mean stopping for decompression
+on the way up.</p>
+
+<p>He recalled that the waves came into the beach from a slightly northerly
+direction and motioned to Scotty that they should turn north. Scotty
+moved out to the limit of visibility, and they swam on a compass heading
+of north, watching for any sign of a wreck. Now and then a coral shelf
+extended out from the reef, but they saw nothing that could have been a
+wreck. Once they swam over a patch of marine growth perhaps twenty feet
+long and ten wide, and a huge eagle ray lifted from it and glided off
+like a weird futuristic airplane.</p>
+
+<p>It was quiet, except for the regular chuckle of their exhausts, and the
+light was subdued and even. It was a world without shadows. Still, Rick
+thought, there was plenty of light for photography. Next time he would
+bring his camera.</p>
+
+<p>The watch showed him that over half their allotted time was gone, and he
+hooted once to Scotty, then reversed course, heading back toward their
+floats.</p>
+
+<p>They approached the patch where they had seen the ray and Rick paused
+suddenly. There was an odd shape on the sand near the patch. He
+flippered over to it and examined it. Scotty joined him. It looked like
+an oversized mushroom protruding from the sand at an angle.</p>
+
+<p>Rick unsheathed his knife and poked at it. The sharp tip penetrated for
+a fraction of an inch, then stopped. It was either rock or metal, and
+judging from the shape, it was unlikely that it was rock. He put his
+knife under it and pried, and the thing moved in the sand.</p>
+
+<p>Both boys went to work on it, scooping the sand from around it. In a
+moment they had it clear. It was something like a dumbbell, covered with
+marine growth where it had been above the sand, but fairly smooth under
+it.</p>
+
+<p>Rick took his belt slate and scribbled, "Metal."</p>
+
+<p>Scotty nodded. Then both of them turned to look at the patch of marine
+life.</p>
+
+<p>A distant throb, as though of a boat, caught their attention. They
+looked up, but the surface was invisible.</p>
+
+<p>It was Tony and Zircon, Rick decided. They probably had returned to the
+cottage and found the diving equipment missing. They could spot the
+location where the boys were diving easily enough, first by the floats,
+then by the bubbles of their exhausts.</p>
+
+<p>Scotty hooted suddenly, four times. Rick turned quickly in time to see a
+six-foot shark speed past. The tips of the pectoral fins and the second
+dorsal were darker than the rest of the fish, and Rick identified it as
+a black-tipped shark. Obviously, the shark was on business of its own,
+not particularly interested in them. Still, it was curious. The shark
+was rushing almost straight up.</p>
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="illus4" id="illus4"></a>
+<img src="images/illus4.jpg" alt=""/>
+</div>
+
+<h3><i>Rick turned in time to see a six-foot shark speed past</i></h3>
+<hr style="width: 65%;" />
+
+<p>Scotty gripped his arm and pointed. More sharks! Another black tip. And
+a ten-foot leopard shark! All rushing upward.</p>
+
+<p>The boys watched tensely, and then out of the dimness above something
+sped down at them, followed by the sharks. It landed in the clear sand
+just beyond the marine growth. Rick saw a black tip go for it, then the
+black tip was struck from the side by the big leopard. In spite of his
+sudden apprehension, Rick couldn't help wishing for his camera.</p>
+
+<p>The sharks rushed again, and the falling object was lifted from the sand
+by the disturbed water. This time, Rick recognized it. A chicken! It was
+tied to a length of string from which dangled a lead sinker. The bird
+was dead, but apparently freshly so. He knew that it was the chicken
+blood that had brought the sharks&mdash;and a giant barracuda! The great
+fish, a full six feet in length, slashed past the sharks and tore a
+chunk out of the bird.</p>
+
+<p>The leopard shark made a fast pass at the barracuda, then turned and
+snapped at a black tip. Rick gulped. A hole suddenly appeared in the
+black's side, as smooth as though scooped out of ice cream. And then the
+other sharks hit the wounded black tip.</p>
+
+<p>There were many sharks now, worrying the chicken and the wounded black
+tip like fierce dogs over scraps of meat. Rick thought, "We'd better get
+out of here!" He hooted twice at Scotty, the signal to ascend. Scotty
+motioned to him to retreat. Rick picked up the dumbbell-shaped object.
+It was heavy, but not too heavy to handle, and he started a slow retreat
+along the sand.</p>
+
+<p>The sharks were paying no attention to the boys, but Rick wasn't at all
+sure that they wouldn't, once the supply of chicken and wounded shark
+were exhausted. His mind raced. Where had the chicken come from? Whoever
+had tossed it into the water would have known that the blood would bring
+sharks. It wasn't a casual toss, either. Not when the chicken had been
+weighted with a fishing sinker big enough to carry it to the bottom.
+Tony and Zircon would never do such a thing. Besides, they had no
+chickens.</p>
+
+<p>Rick and Scotty backed far enough away so that the sharks could no
+longer be seen. Then, heading toward the reef, they started for the
+surface. Scotty was slightly in the lead, and Rick kept glancing back in
+case one of the big fish decided to follow. But they reached the surface
+without incident and broke water about two hundred feet from their
+floats. There was no boat in sight.</p>
+
+<p>Replacing aqualung tubes with snorkels, they swam on the surface, faces
+down, alert for sharks. When they reached the floats, Scotty kept watch
+from the surface while Rick dove to untie the lines.</p>
+
+<p>As they climbed on the floats and lifted masks, Scotty and Rick pointed
+and yelled "Hey!" simultaneously.</p>
+
+<p>But they had seen different things. Rick had seen the <i>Water Witch</i> pass
+through the reef and head for them. Scotty had seen another boat, a big
+cabin cruiser, tied up at the pier in front of the house occupied by the
+fancy frogmen!</p>
+
+<p>Rick turned and looked at the cruiser, then at the house. He was in time
+to see the front door close. There would have been plenty of time for
+someone to drop the chicken from the cruiser and then cross the reef and
+tie up at the dock.</p>
+
+<p>"I'll bet that's where the chicken came from," Rick said harshly.</p>
+
+<p>"That's a bet I won't take," Scotty returned. "But you can bet we'll
+find out!"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_IX" id="CHAPTER_IX"></a>CHAPTER IX</h2>
+
+<h3>Wreck of the "Maiden Hand"</h3>
+
+
+<p>Tony Briotti examined the metallic object they had brought from the
+bottom, then took his knife and scraped at it. Under the covering of
+marine growth, red rust appeared. He looked at Hobart Zircon. "Recognize
+this, Hobart?"</p>
+
+<p>"There's only one thing I can think of that fits the shape, Tony. Bar
+shot."</p>
+
+<p>"My conclusion exactly." Tony weighed the thing in his hand. He grinned
+at the boys. "Adventure-prone, and lucky. Describe the place where you
+found it."</p>
+
+<p>Rick did so, concluding, "The patch didn't look anything like a ship,
+though. If that's what you're thinking."</p>
+
+<p>"After two centuries, the ship would no longer look like a ship. But
+this is unquestionably a bar shot for an ancient cannon. It was used to
+cut ship's rigging, and to knock down masts, and create other damage of
+that sort. It's likely that the pirates, or the <i>Maiden Hand</i>, would
+have carried bar shot."</p>
+
+<p>"I think you have found the ship," Zircon told them, "and the question
+about earthquakes was a good one. There was a heavy quake in this region
+about a year ago. I had occasion to recall it a half hour ago when we
+found a slight fault at the southern tip of the island that had
+uncovered an Indian midden."</p>
+
+<p>"And a fine one," Tony added. "You boys can dive for treasure if you
+want to. I've some work of my own to do."</p>
+
+<p>"Incidentally," Scotty reminded Rick, "in the confusion below we forgot
+to send up a buoy. Hope we can find the place again."</p>
+
+<p>"We can."</p>
+
+<p>"What confusion?" Zircon asked.</p>
+
+<p>Rick told him. "A freshly killed chicken was dropped near us. And it
+must have been bleeding when it hit the water, because we suddenly had a
+shark convention around us." He pointed to the boat tied at the pier,
+now far behind them because the <i>Water Witch</i> had been moving. "And we
+think that was the boat that dropped it."</p>
+
+<p>"It was weighted," Scotty added.</p>
+
+<p>The scientists looked at each other. Tony grunted. "It makes no sense,
+Hobart. Why would anyone weight a freshly killed chicken and throw it
+over the side?"</p>
+
+<p>"No reason at all," the big scientist said, "unless he wanted to create
+mischief below."</p>
+
+<p>"But just the act of dropping a chicken wouldn't ensure harm to divers
+below," Tony objected.</p>
+
+<p>"That's why I said mischief. Inexperienced divers might panic under such
+circumstances and attract the sharks to themselves."</p>
+
+<p>Rick hazarded a guess. "What if they just wanted to keep people from
+diving in the area?"</p>
+
+<p>"That might be one way of doing it." Zircon said thoughtfully. "Are you
+suggesting that there are others after the <i>Maiden Hand</i> treasure?"</p>
+
+<p>Scotty spoke up. "How could anyone else find out about the treasure?"</p>
+
+<p>"It's possible that there are other references besides the logbook we
+found," Tony replied. "But it would be too farfetched to speculate that
+other treasure hunters had found the location and were diving right at
+this time."</p>
+
+<p>"This might be related to what happened on St. Thomas," Rick ventured.</p>
+
+<p>Zircon shook his massive head. "Extremely unlikely. Consider." He ticked
+off the points on his fingers. "Who knew we were coming to Clipper Cay?
+Ernst, Steve, and his Navy friend. We did not mention it to the people
+from whom we bought supplies, nor did we discuss it in the presence of
+others. We were not followed here. No, Rick, I think that we cannot
+blame this incident on the ones in St. Thomas."</p>
+
+<p>"Then it was a dangerous practical joke," Tony concluded. "Unless there
+was some legitimate reason for throwing the chicken over that we don't
+know about."</p>
+
+<p>Zircon steered the <i>Water Witch</i> through the reef entrance, and the
+Spindrifters tied up at the dock. Rick and Scotty inspected the
+compressor and then measured the amount of air in the tanks. They hooked
+the tanks up, refilled the gas tank of the compressor engine, and left
+the tanks to fill while they went to the cottage.</p>
+
+<p>Rick and Zircon prepared dinner while Tony and Scotty refilled the
+gasoline lanterns that provided light, and generally straightened up the
+cottage.</p>
+
+<p>Rick called, "Tony, tell us more about this Indian stuff you found."</p>
+
+<p>Scotty added, "And what's a midden, anyway?"</p>
+
+<p>Tony leaned on his broom. "A midden is a polite name for a refuse heap.
+Before the days of rubbish collection, people used to dump their trash
+in the yard. The Indians did, and thereby provided archaeologists with
+an important source of information. Apparently a tribe lived on this
+island, close to the southern tip. It's likely that they simply dumped
+their rubbish into the water. Well, the earthquake Hobart spoke of
+shifted the old coral formations at the southern tip slightly and lifted
+a few square yards out of the water."</p>
+
+<p>He went to the front porch and brought back a curved piece of material,
+encrusted with coral. "This used to be a pottery bowl, probably Taino in
+origin. I'll probably find many like it."</p>
+
+<p>It didn't look like much of a find to Rick, but he knew that Tony's
+trained eyes could see many things that he couldn't. "You'll dive with
+us, though, won't you?" he asked.</p>
+
+<p>"Of course. But you and Scotty are the real enthusiasts, and the diving
+I do will use up air that you properly should be using. I'll go down
+with you in the morning, because I want a look at the wreck. But after
+that I think Hobart and I can amuse ourselves on the midden while you
+and Scotty hunt treasure. Of course we'll be ready to help if you need
+us."</p>
+
+<p>A few minutes before six, Rick turned on his portable all-wave radio to
+the channel Steve had given him, but the air was silent. He waited for
+ten minutes, then snapped it off again. Apparently Steve had no message
+for them.</p>
+
+<p>Dinner consisted of fresh snapper and barracuda steaks served with
+coconut sauce for which Zircon had learned the recipe during his tours
+of the Pacific. It was delicious, and Rick wondered about the fussiness
+of people who refuse to eat barracuda simply because the fish is a noted
+predator. However, he knew that people are served barracuda every day
+under less offensive names.</p>
+
+<p>After dinner they sat over coffee on the porch and watched the sun sink
+beyond the reef. It was like a Pacific sunset&mdash;colorful and somehow
+soothing.</p>
+
+<p>The boys walked to the pier, checked their tanks, and found them fully
+charged. Then, at Scotty's suggestion, they locked tanks and compressor
+in the cabin of the <i>Water Witch</i>. Fresh-water rinses for the remainder
+of their equipment followed, and they carried the equipment into the
+house.</p>
+
+<p>Zircon was already engrossed in a book, while Tony was engaged in
+scraping the pottery shard he had found. The boys watched him for a few
+minutes, then Scotty suggested, "How about a walk?"</p>
+
+<p>"Okay." There was an idea stirring in the back of Rick's head. As they
+walked down to the beach he said, "We ought to take a look at the folks
+who own that boat."</p>
+
+<p>And Scotty said in the same breath, "Let's visit the fancy frogmen."</p>
+
+<p>They grinned at each other, amused at how much alike their thought
+processes were.</p>
+
+<p>"We'd better approach from the back," Scotty suggested.</p>
+
+<p>Rick agreed. "Suppose we cross to the eastern shore, then walk up until
+we're in sight of the house. It's close to the northern tip, anyway."</p>
+
+<p>It was almost fully dark now, and no lights appeared in the houses south
+of them. As they watched, lights showed far up the beach where the fancy
+frogmen lived. But there were no other lights anywhere on the island.</p>
+
+<p>"Just two houses occupied," Rick said.</p>
+
+<p>"We'll probably have more neighbors during the week end," Scotty
+answered. "The people in the house south of us must have left, but they
+may be back. Come on."</p>
+
+<p>They made their way through the palm grove, watching fruit bats whirl
+against the darkening sky. There was a slight breeze, just enough to
+make the palms whisper. It reminded Rick of Hawaii.</p>
+
+<p>The eastern shore was rough. The reef was much closer here, and long
+swells that had come all the way across the Atlantic sounded like
+subdued thunder as they broke. It was dark now, and only the white of
+the breaking water could be seen.</p>
+
+<p>They walked up the eastern shore until the lights of the frogmen's house
+were directly opposite, then turned toward it, moving with caution.</p>
+
+<p>"Take it easy," Rick whispered. "They may be outside."</p>
+
+<p>As they drew closer they could see that the lights were in the front
+rooms of the house. The back was dark, except for light that came
+through open inner doors.</p>
+
+<p>"Wait." Scotty whispered. "I'll see if they're out front."</p>
+
+<p>Rick sat down to wait as Scotty vanished. Few could equal his pal when
+it came to moving silently and invisibly.</p>
+
+<p>In a surprisingly short time Scotty reappeared. "No one out front," he
+reported. "They're all in the living room."</p>
+
+<p>Rick rose, and together they walked swiftly and silently to the rear of
+the house. The door of the room in which the diving gear was stowed
+opened into the living room. Perhaps they could see in there.</p>
+
+<p>A card game was in progress by the light of a kerosene lamp. Rick
+studied the face of a heavy-set, dark-haired man who sat facing him. The
+man wore a T shirt that displayed the heavy muscles of arms and chest.
+His face was square-jawed and powerful, the eyes set deep under bushy
+eyebrows. His hair was short and curly, sprinkled with gray. He looked
+like one used to command. Rick's quick imagination pictured him on the
+quarterdeck of a slaver, ruling his cutthroat crew with iron fists.</p>
+
+<p>The others were not visible through the door. The boys moved silently to
+the side of the house and drew back so they could look through the
+living-room window. The second man was visible now. He was young,
+perhaps in his twenties, and he had an unruly shock of blond hair. Once
+he might have been good-looking, but a scar crossed a nose that had been
+badly broken.</p>
+
+<p>The third man sat with his back to them. Rick touched Scotty's sleeve
+and they went around the house via the back. The view was blocked by an
+open door.</p>
+
+<p>Scotty put his lips close to Rick's ear. "The front."</p>
+
+<p>Rick led the way, moving carefully because light spilled out of the
+front windows and the open front door. They reached a vantage point and
+looked in. The third man was clearly visible. The boys reached for each
+other at the same moment.</p>
+
+<p>The third man was Steve's shadow!</p>
+
+<hr style="width: 45%;" />
+
+<p>Morning found the <i>Water Witch</i> anchored on the reef close to the place
+where the boys had found the bar shot. There was no sign of activity at
+the fancy frogmen's house, and the boat was tied up as it had been the
+previous evening. Apparently they were late sleepers.</p>
+
+<p>The Spindrifters tossed coins to see who would make the first dive, and
+the lot fell to Rick and Tony. They donned their equipment, then Rick
+picked up a spear gun while Tony selected a wrecking bar from his
+equipment.</p>
+
+<p>It took ten minutes of their precious fifteen to find the wreck again.
+This time, Rick took the precaution of tying a float to a projection and
+unwinding line while the float rose to the surface.</p>
+
+<p>Tony started at one end of the mass of marine growth and inserted his
+wrecking bar. Rick joined him in heaving, and a cloud of dust and fish
+eggs rose to envelop them. It took a moment or two for the water to
+clear enough so they could see, then Tony hooted his triumph. The pull
+had exposed rotted timbers. This had to be a ship! But was it the
+<i>Maiden Hand</i>?</p>
+
+<p>Rick wondered if they would ever be sure. Yet, he felt that it was, even
+though he realized that the feeling grew as much out of optimism and
+hope as anything else. Still, it was unlikely that another ship would be
+wrecked at this same depth.</p>
+
+<p>Tony wrote on his slate, "Mor undr sand thn can see, likely."</p>
+
+<p>Rick nodded. The shifting sands had undoubtedly covered, exposed, and
+recovered the wreck dozens of times in the years it had lain here. He
+looked at his watch, then reluctantly gave Tony the signal to surface.
+Their time was up.</p>
+
+<p>On the <i>Water Witch</i>, Tony said, "It's a ship all right. And since its
+on the western reef at twenty fathoms, I'd say that it's very likely the
+one we want."</p>
+
+<p>"Wonder how Captain Campion pegged the depth so accurately?" Scotty
+inquired.</p>
+
+<p>Zircon had a possible answer. "Let's assume the pirates knew he was
+carrying the golden statue. It would have been logical for them to
+sound, just to see if there was any possibility of recovering the
+treasure from the wreck. Since they kept Campion for ransom, he would
+have heard the depth mentioned."</p>
+
+<p>It seemed reasonable, and it was as good an answer as any, since there
+was no hope of knowing whether it was right or wrong.</p>
+
+<p>"How do we find the statue?" Rick asked.</p>
+
+<p>Tony handed him the wrecking bar with a grin. "Take the wreck apart a
+piece at a time. And if you still haven't found it, start digging."</p>
+
+<p>The boys sighed. Rick recalled reading somewhere that treasure hunting
+was synonymous with ditch digging. Now he knew what the author meant.</p>
+
+<p>Scotty and Zircon prepared to dive, shifting the regulators to fresh
+tanks. While they checked equipment, Rick rummaged through the boat's
+locker and found a length of heavy line. An empty water jug with a screw
+cap was attached to it, and he handed the end of the line to Scotty to
+take down with him.</p>
+
+<p>"The fishing float and line isn't heavy enough. Let's add this, just in
+case."</p>
+
+<p>Scotty took it and went over the side. He carried his spear gun while
+Zircon took the wrecking bar. Rick watched as they vanished from sight,
+leaving only the continuing track of bubbles.</p>
+
+<p>Ashore, a man came out of the fancy frogmen's house and walked down to
+the beach. He shaded his eyes and stared at the <i>Water Witch</i>. Rick
+pointed him out to Tony.</p>
+
+<p>"This business stumps me," the archaeologist admitted. "Are you certain
+about the identity of the man who was trailing Ames?"</p>
+
+<p>"We're dead sure."</p>
+
+<p>"Then is there any possible way he could have known about our presence
+on the island?"</p>
+
+<p>"Not unless he recognized the <i>Water Witch</i>."</p>
+
+<p>"That must be it. The question is, what do we do about it?"</p>
+
+<p>"Nothing, I guess. Except to be on our guard."</p>
+
+<p>Twin sets of bubbles rose, some distance from the boat, showing that
+both lungs were working well twenty fathoms down. Since the bubbles did
+not ascend vertically, they did not show the location of the two on the
+bottom. Rick studied them, working on an idea.</p>
+
+<p>The chicken had dropped pretty close to them. But since their floats
+were tied to the reef, and their bubbles were carried off a vertical
+path by the light currents, neither could have been used to pinpoint
+their whereabouts&mdash;<i>unless whoever dropped the chicken had an excellent
+knowledge of the currents in this particular place</i>!</p>
+
+<p>He carried the thought further. The shadow had gotten upset because he
+and Scotty had gone swimming in an area where something was hidden. At
+least, that was a reasonable assumption, based on the events at St.
+Thomas. The fancy diving gear in the house, the attempt to warn them
+off, and the presence of Steve's erstwhile shadow on Clipper Cay could
+then be added up.</p>
+
+<p>Right here, in this particular area, another mysterious something was
+hidden! Something that the fancy frogmen dived often to see, use,
+collect, or whatever they did with it. That would account for their
+familiarity with the currents!</p>
+
+<p>He started to tell Tony, then reconsidered. It was a pretty good
+hypothesis, he thought, but not supported by ironclad evidence. If he
+told the scientists, they might forbid any more diving in the area. And
+he was determined to get that treasure&mdash;more for his sister Barby than
+for himself. If he failed to get it there would be no living with Barby,
+since she would always maintain <i>she</i> could have found it if they had
+only allowed her to go on their old expedition.</p>
+
+<p>Zircon and Scotty broke water and Rick helped them aboard.</p>
+
+<p>"It's a ship, and a sailing ship at that," Zircon boomed. "We identified
+what was almost certainly a compass binnacle, probably brass, but there
+wasn't time to get it free and bring it up. Scotty found what is
+probably the muzzle of a cannon, buried in the sand."</p>
+
+<p>"There's so much growth over everything that it's hard to tell what's
+what," Scotty added. "But it certainly looked like a cannon muzzle."</p>
+
+<p>"From what we saw, I suspect that the portion above the sand is the
+stern, probably the stern super-structure. If the timbers haven't
+completely rotted away, ripping off the top should expose the stern
+cabins."</p>
+
+<p>"That seems reasonable," Tony agreed. "At any rate, it's a good basis
+for operation. Rick, if you'll look in my kit, you will find a larger
+bar you can borrow. You'll both need tools if you're going to take the
+ship apart."</p>
+
+<p>"Anyway, that's enough diving for the morning," Zircon said. "Let's up
+anchor and go."</p>
+
+<p>While the others got the boat underway, Rick started the compressor in
+the cockpit and connected up the tanks they had used. He almost wished
+he and Scotty had been extravagant and had ordered triple tank blocks to
+give them maximum time under water. Still, the singles were convenient,
+and diving was a sport it wasn't wise to overdo. By the time they were
+through with lunch and had rested awhile, the tanks would be fully
+charged again.</p>
+
+<p>As they tied up, Zircon said, "Tony and I will work at his midden this
+afternoon. You two take the boat. We won't need it. I'll walk over and
+take a look every once in a while, and if we see our friends from the
+cottage near you, we'll come running."</p>
+
+<p>The boys helped Tony prepare a simple lunch of soup and sandwiches, then
+all hands retired to the front porch to eat.</p>
+
+<p>Up the beach, there were signs of activity around the frogmen's boat. As
+they ate and watched, the boat moved away from the pier and approached
+the reef, where it anchored. Rick went to get the binoculars and focused
+them on the scene.</p>
+
+<p>Two frogmen, complete with suits, went over the side right where their
+buoys floated!</p>
+
+<p>"They're diving at the wreck!" he exclaimed.</p>
+
+<p>Zircon took the glasses and watched, then handed them to Tony.</p>
+
+<p>The archaeologist muttered, "Surely they can't be interested in the
+treasure. It would be simply too much coincidence for them even to know
+about it."</p>
+
+<p>"Maybe they're just looking to see what interested us," Scotty offered,
+and his explanation seemed the most plausible.</p>
+
+<p>The group watched until the frogmen surfaced and the boat went back to
+its pier.</p>
+
+<p>"Scotty has it," Zircon agreed. "From what we've seen, I'd say they
+simply followed our buoy lines down to see what we had been doing."</p>
+
+<p>"If that's the extent of their interest, I don't see how we could
+object," Tony said. "Or even if they tried for the treasure we'd have no
+grounds for objecting. The ship is anyone's property after all these
+years."</p>
+
+<p>Rick said flatly, "We won't do any objecting, but we'll do plenty of
+watching. We're going to get that treasure if it's there, whether the
+fancy frogmen like it or not!"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_X" id="CHAPTER_X"></a>CHAPTER X</h2>
+
+<h3>The Wailing Octopus</h3>
+
+
+<p>As Rick steered the <i>Water Witch</i> to its anchorage above the reef, he
+told Scotty about the theory he had developed that morning.</p>
+
+<p>He concluded, "Their going out to take a look where we were diving is
+another piece of evidence. Unless they were afraid that we might be
+interested in their stuff&mdash;whatever and wherever it is&mdash;why would they
+be so concerned about what we're doing?"</p>
+
+<p>"It makes a lot of sense," Scotty agreed soberly. He looked at Rick with
+a sudden twinkle. "It might be a good idea to take a look around down
+below&mdash;just so we'll know what to stay away from, of course."</p>
+
+<p>Rick grinned.</p>
+
+<p>By the time they dropped anchor, Scotty had the diving gear rigged and
+it was only the work of minutes to get into the water. Each carried a
+spear gun in one hand and a wrecking bar in the other. Ordinarily they
+would not have bothered with the guns, but being armed seemed just
+common sense.</p>
+
+<p>On the bottom, Rick scouted around the wreck, looking for signs of its
+former structure while Scotty attacked the stern with a crowbar. Under
+Scotty's prying, a timber suddenly gave with an audible crack, and a
+huge grouper that must have weighed nearly three hundred pounds rushed
+past Rick, startling him half to death until he saw what it was.</p>
+
+<p>Scotty hooted in derision as Rick back-pedaled, then he put his bar down
+and swam to Rick's side. He scrawled on his belt slate, "Whre he cm
+frm?"</p>
+
+<p>Rick shrugged. It was a good question. They swam slowly around, looking
+for the grouper's hiding place and failed to locate it. Rick knew the
+big fish liked caves, rocky clefts, and the interiors of wrecks. This
+one must have a hole somewhere.</p>
+
+<p>He tried again, going right down to the bottom and crawling along with
+stomach touching the sand. Even so, he might have missed the hole if
+stirred-up dust from the fish's sudden departure hadn't indicated where
+it was. The hole, big enough for him to crawl through, was <i>under</i> the
+wreck, hidden by rotted planks covered with marine growth. He hooted for
+Scotty's attention and showed it to him.</p>
+
+<p>He took his belt slate and wrote, "Way into shp?"</p>
+
+<p>Scotty nodded and wrote in his turn, "Too drk. Need lites."</p>
+
+<p>Rick nodded. For a moment he was tempted to try ripping off the planks
+with his bar, but he decided against it. Any disturbance might very well
+collapse the entire structure. He wondered whether the hole was just a
+shallow opening, or whether it actually led into the ship. No matter.
+They had watertight flashlights with their spare gear in the boat. They
+could find out on the next dive.</p>
+
+<p>For their remaining time underwater he joined Scotty in his assault on
+the stern of the ship. They were rewarded by finding what was evidently
+the interior of a cabin. Rick ripped off another plank, then jumped as
+Scotty hooted four times for danger. The cabin was the home of a fairly
+large moray eel! Both boys dropped their bars and grabbed for their
+spear guns, but Scotty held up his hand in a sign to wait. Rick did so,
+and saw the big eel emerge and swim rapidly toward the reef.</p>
+
+<p>Scotty had shown wisdom. The moray is hard to kill, and this one would
+have given them a battle that might have used up more air than they
+could spare.</p>
+
+<p>The water inside the cabin was murky. Rick looked at his watch. They had
+only a few minutes left. He wrote on his slate, "Sty dwn til rsrve
+wrning."</p>
+
+<p>Scotty nodded agreement.</p>
+
+<p>They watched as the water settled and the interior of the cabin grew
+clearer. Evidently it had been a very small cabin. There was a rotted
+frame that might once have been a single bunk, and a few broken, almost
+disintegrated boards that might have been a table. Mattress and bedding
+had long since vanished. Then Rick spotted a squarish shape under the
+ruin of the bunk and motioned to Scotty. They went in after it.</p>
+
+<p>The top crumbled under their touch and silt rose into the water around
+them. But Rick persisted and felt fabric under his hands. He pulled it
+out and recognized a seaman's jacket, brass buttons corroded and fabric
+nearly rotted through. Apparently they had found a sea chest, but their
+exploring hands discovered nothing but rotted fabrics.</p>
+
+<p>Rick felt the warning constriction that told him he had only minutes
+left. He pulled down the reserve lever of his tank and touched Scotty's
+arm. He hooted twice for the ascent.</p>
+
+<p>Back in the <i>Water Witch</i>, they connected their tanks to the compressor,
+put the regulators on charged tanks, then tested their underwater
+flashlights.</p>
+
+<p>Rick said, "Do you realize I haven't taken a single picture?"</p>
+
+<p>"Why not take some on the next dive?"</p>
+
+<p>"Good idea." Rick went into the cabin and brought out his camera.</p>
+
+<p>The camera was the same one he had adapted for night movies, during
+their adventure known as <i>Smugglers' Reef</i>. He had built an underwater
+case for it from stainless steel and Lucite. An intricate gear
+arrangement allowed him to focus or change aperture underwater, and a
+light meter in the rear of the case told him what setting to use. There
+was an ordinary inner-tube valve projecting from one side by which the
+case could be charged with compressed air to compensate for the pressure
+of the water. The unit was battery-powered and had a bracket for
+mounting the infrared light used for night photography.</p>
+
+<p>He unscrewed the front of the case and took the camera from its mount.
+He hesitated. "Suppose there's enough light down there for color film?"</p>
+
+<p>"There might be," Scotty replied, "but you wouldn't gain much by using
+color. Everything would photograph in shades of green. Might as well
+have it in shades of gray."</p>
+
+<p>"You've got a point." Rick loaded the camera with fast black-and-white
+film and returned it to the case. Then he replaced the cover and
+disconnected the compressor long enough to pump pressure into the camera
+case. "Ready to go," he announced.</p>
+
+<p>"Take it easy," Scotty said. "We'd better rest a half hour or so. If we
+don't knock ourselves out, we can get in three more dives today."</p>
+
+<p>Rick knew the wisdom of that. He adjusted the camera and took a series
+of "establishing" shots, to establish that the movie had been taken on a
+boat near an island. Then, when the time came to dive, he photographed
+Scotty entering the water. At his direction, Scotty got out again, while
+Rick got in, swam down a few feet, and took a shot of Scotty entering
+from that angle. Then the camera followed as Scotty flippered smoothly
+down into the deep water.</p>
+
+<p>Rick followed, camera extended in front of him, sighting through the
+gun-type sights mounted on top of the case. There was a handgrip on each
+side, with the controls handy to his fingers. By watching the light
+meter he could change his exposure as the shifting light required.</p>
+
+<p>He moved ahead of Scotty, panned across the wreck, then reversed the
+camera to photograph Scotty approaching. On a hunch, he stood well back
+when Scotty approached the underwater entrance and got a picture that
+was priceless! The grouper had returned to his home, and frightened by
+the light that suddenly probed his hide-out, he flashed out and caught
+Scotty by surprise. Scotty dropped his flashlight and back-pedaled
+frantically. Grinning, Rick kept his camera grinding. Scotty turned and
+saw that Rick was shooting, and held both hands to his face in mock
+dismay. Rick cut and secured the camera to an outcropping with its
+safety line.</p>
+
+<p>Scotty picked up his light and crawled slowly into the opening. Rick
+waited, watching anxiously to be sure his friend's hoses and regulator
+cleared the entrance. Then Scotty vanished inside. In a moment he
+reappeared, headfirst, and beckoned.</p>
+
+<p>Rick followed him in, his own flashlight extended. It was a little murky
+from the grouper's hurried departure, but he saw instantly that they
+were in what had been for those days a large cabin. This must have been
+the skipper's quarters. His light picked out the remains of furniture,
+including one massive chair that was still in good condition.</p>
+
+<p>Scotty gestured with his light and Rick saw an oaken door. He swam over
+to it and inspected it closely. It was still firm, still in place. Where
+did it lead?</p>
+
+<p>There was only one way to find out. He took hold of the old-fashioned
+handle and pulled. The door didn't budge. Rick tried again and failed.
+He swung himself around and put both feet on the wall next to the door,
+then applied leverage.</p>
+
+<p>The handle came completely off. Rick sailed backward across the cabin
+and his tank rang like a bell as it struck something metallic. Scotty
+hurried to his side, and Rick gestured that he was all right. They
+turned to inspect the object against which Rick had hurtled and found
+that it was the still-sound strap for a beam, probably made of wrought
+iron.</p>
+
+<p>Rick took his belt slate and wrote, "Whre wld he hide it?"</p>
+
+<p>Scotty read it with his light, then shrugged. They began a methodical
+inspection of the cabin, surprised that it was so clear of marine life.
+Rick surmised that the opening had developed only recently, perhaps from
+the shifting of the ship. They found a closet and a heap of what had
+once been clothes on its floor. Then Scotty made the big discovery of
+the day. He reached into a shelf space above the bunk, hand exploring,
+and touched something hard. He drew it out. It looked like a
+green-covered bundle about a foot long and two inches thick. But before
+he had a chance to inspect it further, his air gave out and both boys
+hurried to the surface on their reserves.</p>
+
+<p>Aboard the <i>Water Witch</i> they shed their equipment and sat down to
+inspect Scotty's find. The covering proved to be layer after layer of
+oilcloth, wrapped around the object. The outer layers had deteriorated
+somewhat, but the inner ones were intact.</p>
+
+<p>Scotty finished unwrapping and found a second wrapping of still-dry
+linen. He pulled the linen off, and both boys gasped. It was a jeweled
+dagger, with a good-sized ruby winking in its hilt!</p>
+
+<p>"Take it out of the sheath," Rick suggested.</p>
+
+<p>Scotty did so, and disclosed a blade covered with some hard brown
+substance. "That's not rust. Got a jackknife?"</p>
+
+<p>Rick found one and handed it to him. Scotty scraped and was rewarded by
+the gleam of bright metal.</p>
+
+<p>"It must have been coated with heavy grease," Rick remarked. "During the
+years, the grease hardened into a permanent rustproof coating. Wait
+until the scientists see this!"</p>
+
+<p>Scotty grinned his pleasure. "This is one treasure the log didn't
+mention. Poor Captain Campion must have thought a lot of it to protect
+it so thoroughly."</p>
+
+<p>"He might have been taking it to the New World as a gift for some
+influential friend," Rick ventured. "It looks like Spanish work."</p>
+
+<p>Scotty looked at Rick speculatively. "Are you making a claim on this?"</p>
+
+<p>Rick knitted his brows. What was Scotty driving at? "You found it," he
+said. "Technically, we're supposed to share and share alike, the four of
+us and Barby. But how do you split a dagger? And we wouldn't sell it,
+anyway. It's too nice a souvenir."</p>
+
+<p>"I'll ask Tony and Zircon," Scotty said, "but if none of you have any
+objection, I would like to claim it, because I want to give it to Dad
+for a birthday present next month."</p>
+
+<p>Rick punched him on the arm. "You'll get no objection from me. Or from
+Tony and Zircon either."</p>
+
+<p>"I can buy presents for the family," Scotty said slowly. "I do, on
+birthdays and Christmas. But I've always wanted to give Dad something
+really special, something to tell him how I feel about being taken into
+the family."</p>
+
+<p>Rick nodded. He knew how Scotty felt, and he liked him all the better
+for it. "Let's get ready for the next dive," he said abruptly.</p>
+
+<p>They went through the necessary checks on their equipment, transferring
+the regulators to the third set of tanks. Rick decided to leave the
+camera on the boat this time. He was anxious to inspect the ship
+thoroughly, and photography took time.</p>
+
+<p>After a half hour of rest the boys went back into the water again,
+carrying their wrecking bars and spear guns, flashlights on their belts.</p>
+
+<p>An inch-by-inch inspection of the cabin disclosed no more treasures, but
+Rick found a plate, still intact. He wondered if it were the plate from
+which the captain had last dined before the pirate attack, and put it
+outside the entrance to be carried to the surface.</p>
+
+<p>Once satisfied that the cabin held no secrets, the boys attacked the
+door. It was hard work, and they raised so much dust that their light
+beams were almost useless. However, they struggled on until the door
+finally gave, only to admit quantities of sand.</p>
+
+<p>Rick guessed that the door had opened onto a deck that was now buried
+far under the sand. They went outside to allow the murkiness to settle
+in the cabin, and Rick consulted his watch. Their time was nearly up. He
+hooted to Scotty and they surfaced.</p>
+
+<p>The first tanks they had used were ready now. They shifted the
+regulators and hooked up another pair to the compressor.</p>
+
+<p>"I'm afraid Tony was right," Rick said. "We'll have to take the ship
+apart piece by piece."</p>
+
+<p>Scotty examined his foot where the fin was rubbing a little. "What would
+be a logical hiding place? If I were the captain, I'd probably hide the
+statue under false flooring or something. Anyway, I'd hide it aft, in
+officer's country, and not near the forecastle where the crew lived."</p>
+
+<p>"That's probably right. Anyway, we won't have time to do much wrecking
+today. What say we hunt for loose boards in the cabin?"</p>
+
+<p>Scotty grinned. "The treasure fever has got our boy Rick. Have you
+forgotten we were going to see what those fancy frogmen were curious
+about?"</p>
+
+<p>Rick grinned back, a little sheepishly. "You're right. I had forgotten.
+Well, we can spend half the time looking for the treasure and the other
+half looking for the frogmen's cache."</p>
+
+<p>The search for the treasure disclosed no loose boards, or anything
+resembling a secret hiding place. At the end of ten minutes they turned
+from the wreck and swam along the bottom toward the reef.</p>
+
+<p>Since they had no idea what they were looking for, the search couldn't
+be a very carefully planned one. Rick led the way, following the reef,
+taking time to examine the coral formations. There were countless sea
+urchins, and enough small fish to feed the entire population. Bigger
+fish, however, were not plentiful. Once Rick saw a snook that would have
+been worth taking, but the fish sped off into the watery gloom. Again,
+Scotty called his attention to a deadly scorpion fish. This small,
+rather weird-looking little creature had a dangerous defense mechanism
+in the spines of his back. His poison bore a strong resemblance to cobra
+venom. The boys gave him a wide berth.</p>
+
+<p>Now and then a moray glared at them with unwinking eyes from a crevice,
+but the boys paid no attention. The morays wouldn't attack unless
+disturbed, and there was no reason for disturbing them. Rick wondered if
+the big one they had ousted from the wreck had found a new home.</p>
+
+<p>They passed a colony of sea worms, colorful even in the green light. The
+worms were pretty, but their long hairs could give a painful sting.</p>
+
+<p>Their time was growing short. Rick consulted his watch, then his depth
+gauge. They were at eighty-five feet. Because of the shallower water
+they would have a little more time, perhaps another five minutes before
+constricted breathing told them only a few minutes of air remained.</p>
+
+<p>Scotty found a puffer and waved at him, but the fish paid no attention.
+Scotty motioned to Rick, then reached out and scratched the creature's
+stomach. It began to gulp water until it resembled a balloon. They left
+it to return to normal in its own time. On the surface, the puffer would
+have gulped air in the same way. They had caught them on lines many
+times.</p>
+
+<p>They were past the <i>Water Witch</i> now, Rick estimated. He hooted at
+Scotty, then led the way up to a depth of about forty feet. There he
+started back along the cliff.</p>
+
+<p>Suddenly he wished he had brought a game bag attached to his belt. The
+reef here was alive with shellfish. He identified cowries, whelks, and
+some excellent specimens of Triton's horn. They would have to come back
+again, to collect some to take home. The biggest problem was getting the
+animals out of their shells, unless there were some anthills on the
+island. Ants would do the job neatly in a few days.</p>
+
+<p>Scotty hooted, and pointed. Directly ahead was a small shelf. Rick moved
+to Scotty's side and saw the dark opening of a cave. Next to the opening
+was a small octopus. As they approached he changed color, trying to
+imitate the multicolored coral against which he rested.</p>
+
+<p>Rick reached out a hand and the animal retreated, sliding into the mouth
+of the cave. Apparently this was his home, because the ledge was
+littered with shells from a number of meals.</p>
+
+<p>Now Rick wished for his camera, then smiled inwardly. To satisfy all his
+unexpected wishes he would need a sort of underwater trailer to tow his
+gear.</p>
+
+<p>Scotty moved close to the octopus and it retreated still further. Both
+boys knew the creatures were harmless to divers, and some divers even
+handled them. But there were reports of divers being bitten while
+playing with octopuses, and they had learned long ago that unnecessary
+risks were foolish.</p>
+
+<p>Rick suddenly rocked back as his ears were smitten by sound. A wail
+echoed in his head, so intense that it almost hurt. Scotty started, too,
+and reached for the ledge in his astonishment.</p>
+
+<p>The octopus peered out of the cave, and the wail came again, buzzing
+uncomfortably in their heads. And in that moment, Rick's air gave out.
+He pulled the reserve lever and planed to the surface, Scotty close on
+his heels.</p>
+
+<p>On the <i>Water Witch</i> they stared at each other.</p>
+
+<p>"Did you hear that?" Scotty demanded.</p>
+
+<p>"I'll say I did!"</p>
+
+<p>"That octopus wailed," Scotty insisted. "Twice!" He hesitated, then put
+Rick's thoughts into words. "Only&mdash;octopuses don't wail. They don't make
+noise of any kind."</p>
+
+<p>"This one did," Rick said. "A wailing octopus! This is either a new
+scientific find, or ..."</p>
+
+<p>"Or we've found what the fancy frogmen didn't want us to find," Scotty
+concluded.</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XI" id="CHAPTER_XI"></a>CHAPTER XI</h2>
+
+<h3>Lights on Clipper Reef</h3>
+
+
+<p>"This," Hobart Zircon boomed, "is a phenomenon that will rock the
+science of zoology to its very depths! We will examine this creature and
+determine his genus and species, and we will name him after you two.
+<i>Octopus waili branti-scotti.</i> Or perhaps <i>Octopus screami</i> would be
+better."</p>
+
+<p>"Of course we're not certain that it was a wail," Rick said soberly. "He
+might have been singing. He might even have been telling us to go catch
+him a fish."</p>
+
+<p>Tony Briotti observed, "This may not be an isolated phenomenon. Who
+knows? A search may disclose screaming squid, or simpering sharks, or
+burbling barracuda."</p>
+
+<p>"Seriously," Zircon asked, "have either of you a theory to account for
+this? Or do you really believe that the octopus wailed?"</p>
+
+<p>"We'd be in a better position to answer that if we'd had a chance to
+explore the cave," Scotty replied. "How can we tell? Maybe the octopus
+really did wail, and we were the lucky ones who heard the sound for the
+first time." He grinned. "We should have wailed back and tried to strike
+up a conversation."</p>
+
+<p>Rick agreed. "I'm with Scotty. We just don't know. I agree that a
+wailing octopus is a new kind of beast, but that's not entirely
+impossible, is it?"</p>
+
+<p>"Perhaps not." Tony stared at the sunset. "I'm trying to recall the
+physiology of <i>Octopus vulgaris</i>, as the garden variety of octopus is
+called, but my memory isn't working. It isn't beyond reason. After all,
+some fish make sounds. I've caught croakers myself that were pretty
+noisy. But I've never heard of octopus sounds until now."</p>
+
+<p>Scotty chuckled. "Haven't I read that octopuses have some intelligence?
+We might teach him to sing. He'd be a natural for television."</p>
+
+<p>"You say that the sound was loud?" Tony asked.</p>
+
+<p>"Very loud. My head hurt. Did yours, Scotty?"</p>
+
+<p>"I'll say! For a minute I thought my brain cells were rubbing together."</p>
+
+<p>Zircon sighed. "I am stumped. And not only by your Wailing Willie,
+either. This whole affair baffles me, including the presence of Steve's
+former tail on this island. Hasn't it occurred to you that those fancy
+frogmen, as you call them, would have made some overt move by now if
+they were really interested in us?"</p>
+
+<p>"Dropping the chicken was an overt move," Rick pointed out.</p>
+
+<p>"Yes and no. I'd prefer to call it a not-too-subtle warning. Yet they
+haven't tried to interfere with your diving around the wreck."</p>
+
+<p>"I've wondered about that," Scotty offered, "and it seems to me they've
+satisfied themselves that our interest is just in the wreck, and not in
+whatever they have hidden underwater. If they have anything hidden, I
+mean. As long as we stick with the wreck, they have no reason for
+causing trouble."</p>
+
+<p>Tony agreed. "That makes sense to me. Perhaps you can answer this: Why
+do they wear cold-water suits? It's appreciably cooler at twenty
+fathoms, but it's certainly not cold enough for a suit."</p>
+
+<p>"We only stay down fifteen minutes," Scotty said. "If we stayed down
+longer we might get chilled. The water isn't warm by any means down by
+the wreck."</p>
+
+<p>Rick had a thought. "We're used to cold water, remember? Diving off
+Spindrift would chill a polar bear, even in summer. Suppose these people
+had done all their diving in tropic waters? This water would seem cold
+to them, particularly down deep."</p>
+
+<p>It was nearly dark now, only a glimmer of light in the west. The four
+sat on the front porch of the cottage.</p>
+
+<p>Zircon asked, "Did you monitor the radio tonight, Rick?"</p>
+
+<p>"Yes, but there was no word from Steve."</p>
+
+<p>"Don't you think he might like to know about the presence of his shadow
+on Clipper Cay?" Tony inquired.</p>
+
+<p>Rick pointed to the Sky Wagon resting on the beach. "Trouble is, that's
+our only communication. I could contact the St. Thomas airport and
+request that they pass a message, but that would be like broadcasting it
+to the world. Steve might not like it."</p>
+
+<p>Zircon's deep voice cut into his comment. "Look! Our friends are
+apparently going to do some night work."</p>
+
+<p>There were lights on the frogmen's boat, and it was putting out. As the
+Spindrifters watched, it slowly approached the reef, then stopped.
+Scotty got the glasses and examined the scene. "Something's up!" he
+exclaimed. "I saw a diver go over the side!"</p>
+
+<p>Hobart Zircon coughed self-consciously. "Do you know, I have taken a
+certain amount of pride in the fact that I am by nature a conservative
+individual with a highly developed capacity for minding my own
+business."</p>
+
+<p>Rick wondered what on earth the big scientist was getting at.</p>
+
+<p>"The pursuit of truth has led me along many devious routes," Zircon
+continued. "I have tried, with some success and many failures, to plumb
+the mysteries of Nature. But while I have tried to make the business of
+our natural universe my own, I have never thrust my not-inconsiderable
+nose into the business of neighbors. However, this admirable reticence
+has limits, since, as a scientist, I am also possessed of that inherent
+trait of curiosity without which no person can succeed in science."</p>
+
+<p>Rick exploded into laughter. "And what you're leading up to is, you want
+to go see what those people are doing!"</p>
+
+<p>"Precisely," Zircon admitted.</p>
+
+<p>Tony and the boys roared with laughter.</p>
+
+<p>"Hobart," Tony said with a chuckle, "you never fail to astonish me. And
+how do you propose to stick your not-inconsiderable nose into the
+business now going on over there?"</p>
+
+<p>Zircon waved his hand. "The method was developed by our young Mr. Brant,
+who sometimes shows slight sparks of intelligence. He has a device which
+projects infrared light, and glasses that allow the wearer to see
+whatever that light illuminates."</p>
+
+<p>Rick stared. Zircon was proposing that they take his underwater camera
+and use it for illumination. That must mean ... "You want to swim over
+with the lungs?" he asked incredulously.</p>
+
+<p>"And why not?"</p>
+
+<p>"But we've never done any night diving!"</p>
+
+<p>"You tested the camera at night, did you not?"</p>
+
+<p>"Yes," Rick admitted, "but that was in water that we knew, off Pirate's
+Field at home. And we only stayed in long enough to expose a few feet of
+film."</p>
+
+<p>"We know enough about these waters to know that there are no dangerous
+obstructions beyond the reef, at least between here and the <i>Maiden
+Hand</i>."</p>
+
+<p>Scotty laughed. "This is a day I never thought would come. It's usually
+the other way around, with Rick trying to sell some idea that everyone
+else opposes. Why not swim at night, Rick?"</p>
+
+<p>"No reason," Rick admitted. "It was just that it hadn't occurred to me.
+There's one difficulty, though. I have only two pairs of glasses with
+infrared-sensitive lenses. So only two of us could go."</p>
+
+<p>"Only two could dive with the camera," Tony corrected. "But all of us
+could go. Two would remain on the surface, with the floats, in case of
+trouble."</p>
+
+<p>"Who would dive and who would stay on the surface?" Scotty demanded.</p>
+
+<p>Rick produced a quarter. "Let coins decide. Except for the professor. He
+thought of it, so he dives."</p>
+
+<p>"Fair enough," Scotty agreed. "All right with you, Tony?"</p>
+
+<p>"Of course. The three of us, then. Odd man goes with Hobart."</p>
+
+<p>Tony and Scotty produced coins. With Rick, they walked into the living
+room and lighted a kerosene lamp.</p>
+
+<p>"Now," Rick said, and tossed his coin, catching it in the palm of his
+hand and slapping it onto his other wrist. Tony and Scotty followed
+suit. Rick uncovered first. He had heads. Tony uncovered and displayed a
+tail.</p>
+
+<p>Scotty groaned. "Shucks! I lose. It's one of you."</p>
+
+<p>Rick held his breath as Scotty uncovered&mdash;another tail! He turned to
+Zircon. "We dive, while Scotty and Tony stay topside."</p>
+
+<p>"Good. Well, what are we waiting for?"</p>
+
+<p>They changed quickly into trunks, then assembled their diving gear. Rick
+took the front plate from his camera and put the infrared searchlight on
+its mounting bracket. He changed to a fresh battery, then replaced the
+film in the camera with the special infrared-sensitive film.</p>
+
+<p>Whatever the infrared illuminated could be seen through special glass.
+Rick had ordered lenses ground from the glass and had placed them in
+frames made to fit into a face mask. These frames could be purchased at
+any diving-equipment supply house. They had been designed for divers who
+had to wear their own corrective glasses, and they suited Rick's purpose
+to perfection. He handed a pair to Hobart Zircon, then inserted the
+other pair in his own mask.</p>
+
+<p>Zircon, Tony, and Scotty decided to take spear guns. Zircon chose Rick's
+rubber-powered gun, while Tony selected the light spring gun. Scotty
+chose the highest-powered gun they had, a new jet-type powered with
+carbon dioxide.</p>
+
+<p>Rick and Zircon connected their regulators to two freshly filled tanks,
+then tested the equipment. Zircon tied a rope to his belt.</p>
+
+<p>The big scientist drew them together for a brief conference.</p>
+
+<p>"We'll swim out and cross the reef," he directed. "Then we'll swim along
+the reef, staying as close as possible to the breakers. They will help
+conceal us. When we approach the boat, Tony and Scotty will stop and
+hold position. Scotty, are the binoculars waterproof?"</p>
+
+<p>"Yes, they are."</p>
+
+<p>"Then take them. Rick and I will go directly to the bottom at the base
+of the reef. We will then proceed along the reef until we spot our
+friends yonder."</p>
+
+<p>Rick had an unhappy thought. "Suppose they see us?"</p>
+
+<p>"We will try to prevent them from seeing us. However, if they do, I
+suggest a retreat in as good order as we can manage. If they should
+catch up with us, we will bluster and bluff our way on the basis that we
+were only diving to see if they were trying to search our wreck."</p>
+
+<p>Scotty laughed. "Turn their own table on them. That's very good,
+Professor."</p>
+
+<p>"I'm glad I'm not a physicist," Tony said piously. "We archaeologists
+aren't half so devious."</p>
+
+<p>"I am acting in my capacity as a former consultant to JANIG, and not as
+a physicist," Zircon retorted with dignity. "You will refrain from
+casting aspersions on my profession, Doctor Briotti."</p>
+
+<p>"My apologies," Tony said, grinning. "In other words, the man is
+devious, but the scientist is not."</p>
+
+<p>"Exactly. Well, shall we go?"</p>
+
+<p>Rick was glad to get into the water. The camera in its underwater case
+was heavy in air, but weighed only a few ounces in water. He swam with
+face mask under, breathing through his snorkel and letting the camera
+hang.</p>
+
+<p>They crossed the reef without difficulty, then turned to swim along it.
+The trough just seaward of the breaking point of the waves was the most
+comfortable swimming position and they went in single file, Zircon
+leading.</p>
+
+<p>Every now and then Rick looked up. They were getting near the boat, he
+thought. Perilously near. The boat was anchored just inside the reef,
+and he could see activity on its deck. Apparently the frogmen had
+returned from their first dive and were changing tanks.</p>
+
+<p>Zircon stopped swimming and lay motionless in the water. Rick drew
+abreast of the big scientist, and Tony and Scotty stopped behind them.
+As they watched, suited figures with belt lights and back tanks climbed
+down a ladder into the water. A third man, on deck, lowered something to
+them. It was hard to see, but Rick thought it had a golden glisten and
+that it was round, about the size of a basketball. The frogmen took it
+and went under.</p>
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="illus5" id="illus5"></a>
+<img src="images/illus5.jpg" alt=""/>
+</div>
+
+<h3><i>A third man lowered something that glistened like gold</i></h3>
+<hr style="width: 65%;" />
+
+<p>Zircon's big hand took Rick by the shoulder, then he turned and motioned
+to the others that they were going under. Rick shifted from snorkel to
+aqualung mouthpiece. He took the end of rope that Zircon held out and
+snapped it to his weight belt. He and Zircon were now connected by a
+ten-foot length of rope, necessary to keep them from becoming separated
+in the darkness.</p>
+
+<p>He submerged and dove straight down into the blackness. His thumb
+compressed the button on the side of the case and the camera started,
+the infrared light turning on. A narrow cone of water extending out
+about twenty feet was illuminated, but the illumination was visible only
+through the special glasses he and Zircon wore.</p>
+
+<p>Rick held the button until they reached bottom, then suddenly realized
+he would use all his film before they had even found the frogmen. He
+groaned silently. Why hadn't he used his head? The light as well as the
+camera motor were operated by the same button. If he had only thought,
+it would have been a few seconds' work to change the circuit so the
+light would be on continuously. Or he might even be able to rig a
+waterproof switch that would operate just the light.</p>
+
+<p>Well, it was too late now. He jerked on the rope for Zircon to stop,
+then took his belt slate and wrote, "Cam on whn lite is. Wll use nw &amp;
+thn." He held it in the beam of infrared light for Zircon to read. The
+scientist scribbled "OK" under the message, then gave him a gentle push
+as a signal to go ahead.</p>
+
+<p>Rick held his wrist in the beam and read ninety-two feet on his depth
+gauge. He calculated quickly. They would have enough air for about
+twenty-five minutes at this depth.</p>
+
+<p>He held the camera switch long enough to see that there was only smooth
+bottom ahead, then released it. Almost total blackness flooded in. For
+all practical purposes it was completely dark, no glimmer of light to
+mark their way.</p>
+
+<p>For an instant Rick felt panic, but reason reasserted itself. It was
+instinctive to feel fear under such circumstances, he thought. Not only
+was he out of his own medium, air, but in a high-pressure realm
+inhabited by potentially dangerous creatures. He grinned inwardly at the
+thought. The most dangerous creatures in this vicinity were human.</p>
+
+<p>A twinkle of light stopped him, but Zircon continued on and the
+connecting line tightened. Rick identified the twinkle as
+phosphorescence from some marine creature on the reef. There were many
+such in the ocean. He flashed the infrared light, saw that they were
+still heading properly, and cut it off again.</p>
+
+<p>The rope at his belt tugged four times for danger! He stopped instantly,
+letting go of the camera with one hand while he reached for his belt
+knife. Then he saw what Zircon had seen, a glow in the water ahead and
+above them. Rick estimated quickly the distance they had traveled. There
+was no doubt of it. The frogmen were at the octopus cave!</p>
+
+<p>He followed Zircon's lead, cutting the light off and on as necessary, as
+the big scientist moved ahead. The glow grew in intensity, but they were
+still too far away to see its exact position, or whether there were men
+around it.</p>
+
+<p>Rick's heart beat faster, and his breathing speeded up appreciably. In
+spite of Zircon's plan to claim they were only checking on the frogmen's
+interest in the wreck, Rick knew that being discovered would mean
+serious trouble. He recalled Steve's warning that they were up against a
+ruthless enemy.</p>
+
+<p>The question was, how close could they get without being seen? He could
+take pictures at ten feet, but at any greater distance the camera would
+be useless.</p>
+
+<p>Zircon moved ahead, going slowly now. Rick followed, not bothering with
+the dark-light unit because the glow in the water was enough for a
+beacon. Then the glow faded for a moment as a figure crossed in front of
+it. Still Zircon moved ahead until Rick could see two additional,
+smaller glows that he identified as the belt lights the frogmen had been
+wearing.</p>
+
+<p>Zircon continued on, still hugging the bottom, and Rick divined his
+intention. The big scientist was going to take them directly under the
+frogmen! It was logical, since the frogmen would not expect danger
+below.</p>
+
+<p>Rick followed, staying just behind Zircon's flippers, feeling the wash
+of water from his wake. The light was nearly overhead now, and Rick saw
+dark figures moving. It was unreal, like a Hollywood motion picture,
+except that the tense music of a movie production was replaced only by
+the soft sighing of their regulators.</p>
+
+<p>And with the thought, Rick almost lost his mouthpiece. Their bubbles!
+Their bubbles would rise right past the frogmen, a dead giveaway! It
+might already be too late, because Zircon was almost directly under the
+cave!</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XII" id="CHAPTER_XII"></a>CHAPTER XII</h2>
+
+<h3>Clouds Over Clipper Cay</h3>
+
+
+<p>Rick jerked frantically on the tie rope, four times for danger, then he
+turned and swam rapidly back the way they had come. At first he felt
+resistance on the line, then Zircon hurried to catch up. Not until they
+were barely within seeing distance of the light did Rick stop, then he
+took his belt slate, started the camera for light, and wrote "Bubbles go
+by thm if we undr. They see."</p>
+
+<p>Zircon held a hand to his head in a sign of chagrin that he had
+forgotten, then he wrote, "Hw we gt clos?"</p>
+
+<p>Rick pondered the problem. The bubbles had alarmed him in another way,
+too. It was possible that the man on the boat could see four sets of
+bubbles rising where only two were supposed to be. Yet, he couldn't
+escape the feeling that it was important to get a look at what the
+frogmen were doing. There was no way out of it. He just had to take a
+chance.</p>
+
+<p>He wrote, "I mak pass hldng brth so no bbls, tak pix. U sty out of rnge
+&amp; cvr me wth gn."</p>
+
+<p>Rick had just one hope of getting away with it. He had to assume that
+the frogmen would be busy with whatever they were doing in the cave. If
+so, their backs would be to the open sea. At least the chance was worth
+taking.</p>
+
+<p>Zircon wrote, "OK bt be crfl."</p>
+
+<p>Rick didn't need the warning. Together, they swam back until they were
+close to the glow of the lights. He hoped that the darkness and breaking
+surf above were concealing their bubbles. Finally Zircon halted. Rick
+unsnapped the line that held him to the scientist, squeezed Zircon's
+shoulder, and swam away from the reef toward the open water. He kept his
+head turned so he could keep the light in his field of vision.</p>
+
+<p>When he was out far enough he swam upward until he was on a level with
+the light, and directly out to sea from it. He inhaled, filling his
+lungs, then with camera outthrust, he drove directly toward the light.
+It wasn't hard to hold his breath&mdash;not with his heart acting as a
+stopper in his throat.</p>
+
+<p>The light grew clearer. He started the camera and kept moving with
+powerful strokes. Then he held his legs still and let inertia carry him
+in a silent glide. He had to get close&mdash;close!</p>
+
+<p>The light grew in intensity, and details grew clearer. He saw the
+frogmen, and their backs were to him! Between them, he caught a glimpse
+of something brassy and round, and he saw the octopus, clinging to the
+reef to one side of the cave.</p>
+
+<p>He held the camera button as long as he dared. Then when it seemed that
+he would glide right into the frogmen, he twisted sideways and bent
+backward like a circus acrobat, flippers moving in powerful thrusts. It
+was an excellent underwater imitation of a wingover, the plane maneuver
+that reversed direction by diving and turning. He planed downward until
+he touched bottom, then thrust himself with frantic kicks away from the
+vicinity of the cave.</p>
+
+<p>His lungs were about to burst, he felt, when finally he drew a deep
+breath. The gurgling sigh of his bubbles was sheer relief. He kept
+moving until he bumped headlong into Hobart Zircon. The scientist
+reached out and snapped his rope onto Rick's belt, then tugged twice.</p>
+
+<p>Zircon led the way along the reef bottom until they reached the spot
+where, they estimated, Tony and Scotty would be waiting. As they started
+for the surface, Rick switched on the camera and looked at his watch.</p>
+
+<p>They had been under only ten minutes! And he had been waiting for the
+warning constriction of air running out!</p>
+
+<p>Zircon broke water and instantly submerged again. He led the way a few
+feet under the surface to where he had seen Tony and Scotty, then led
+Rick to the top once more.</p>
+
+<p>Tony and Scotty saw them emerge and without a word turned and started
+back toward the cottage, pushing their floats. Instead of bothering with
+the snorkel, Rick kept the aqualung mouthpiece in place and swam a few
+feet under the surface, guiding himself by the wake of the others. He
+was tired&mdash;and relieved.</p>
+
+<p>The group crossed over the reef and swam to the beach in front of the
+cottage. There they gathered at the water's edge and stripped off their
+gear. For long moments no one spoke, then Zircon asked, "See anything,
+Rick?"</p>
+
+<p>"A little. Enough to get an answer, I think. We haven't discovered a new
+breed of octopus, because they were installing something in the cave.
+Something that makes a noise."</p>
+
+<p>"Do you know that, or do you infer it?" Tony asked.</p>
+
+<p>"I didn't hear the noise, if that's what you mean. But what else could
+it be?"</p>
+
+<p>"Too bad," Scotty said. "Now we won't have a new species named after us.
+Come on, give us the word. How was it?"</p>
+
+<p>Rick said, with complete truth, "I was scared to death."</p>
+
+<p>"And so was I," Zircon admitted. "At first the sensation of complete
+blackness caused an emotional reaction. Then I began to see that we had
+done a rather foolish thing. And I almost got us into trouble by
+forgetting that we send up a constant stream of bubbles." He told them
+of his plan to get under the cave, and of Rick's warning.</p>
+
+<p>"We thought of your bubbles," Scotty told them. "I talked it over with
+Tony, and came within an ace of diving after you, although I doubt that
+I could have reached bottom and found you. But we watched, and we
+couldn't see any bubbles at all. It was too dark, and we were right
+where the water was breaking."</p>
+
+<p>"My question is, did you get a picture?" Zircon wanted to know.</p>
+
+<p>"I'm sure I did. The camera was going, and it probably saw much more
+than I did&mdash;since cameras don't get scared. But it won't do us much good
+right now. We can't develop the film."</p>
+
+<p>The boys picked up the equipment and carried it to the <i>Water Witch</i>.
+Rick turned off the compressor. He was too tired to wait until all tanks
+were full. Time enough for that in the morning.</p>
+
+<p>When he and Scotty returned to the cottage, Tony greeted them with cups
+of hot chocolate and they sat on the porch and enjoyed them.</p>
+
+<p>"Let's sum up what we know," Zircon invited. "If anyone agrees that we
+know anything worth summing."</p>
+
+<p>"I think we do," Rick said, "and I think we ought to get it to Steve
+Ames. We don't know what he's after, or what kind of gang he's fighting,
+but we know one of them is here."</p>
+
+<p>"Yes, and we also know that Steve's agency is primarily concerned with
+protecting military secrets," Zircon added. "I agree with Rick. We must
+get word of these mysterious frogmen to him."</p>
+
+<p>"We discussed that earlier," Tony recalled. "In view of our discussion,
+it would seem that either Rick or Scotty or both must fly to Charlotte
+Amalie and tell him personally."</p>
+
+<p>Scotty pointed at the sky. "Have any of you looked up there?"</p>
+
+<p>All of them did. The moon was just rising, and there was enough light to
+see heavy cirrus moving high overhead.</p>
+
+<p>"There's a front of some kind moving down on us," Scotty said. "And did
+you notice the swells tonight? Long ones. I'm no first-class weather
+forecaster, but all the signs are there. We're in for a storm. The
+question is, how soon will it arrive?"</p>
+
+<p>"He's right," Zircon agreed. "I'm glad you're observant, Scotty.
+Frankly, I hadn't even bothered looking at the weather. I suppose I
+thought it would just continue to be perfect."</p>
+
+<p>Rick stared at the gathering clouds for long moments, then put into
+words the thing that had been bothering him.</p>
+
+<p>"You know, there has been a cloud over this vacation almost from the
+moment we landed at Charlotte Amalie. We didn't want to get involved in
+anything but diving and exploring, but we got pulled by the ears into a
+hot case. Steve warned us off that first day. The warning didn't help,
+because we got dragged back into things when we went swimming, and again
+at the hotel."</p>
+
+<p>Three faces were turned toward him, listening. He was expressing what
+all of them had been thinking, too.</p>
+
+<p>"We thought we'd leave trouble behind when we came here," Rick
+continued, "but it was waiting for us. We didn't look for it, until
+tonight."</p>
+
+<p>He drew a deep breath. "Well, from now on we have to become the hunters.
+Steve Ames doesn't know there's anything strange going on here. We do,
+and it's up to us to find out what. The goings-on in the octopus cave
+have something to do with the case Steve is working on&mdash;and what Steve
+is working on has something important to do with national security."</p>
+
+<p>He smiled grimly. "I know none of you will disagree with this, because
+it's the only thing we can do. Professor Zircon knew it tonight when he
+tried to excuse our looking in on the frogmen as curiosity."</p>
+
+<p>Zircon nodded silently.</p>
+
+<p>"From now on," Rick concluded, "we have to operate as unofficial JANIG
+agents, until we can get word to Steve Ames so he and his men can take
+over."</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XIII" id="CHAPTER_XIII"></a>CHAPTER XIII</h2>
+
+<h3>Message in the Storm</h3>
+
+
+<p>The wind blew. It piled the surf high on the reef and blew the tops from
+waves between the reef and the shore. Hour by hour the wind stiffened,
+until the breakers on the shore were higher than those through which the
+Spindrifters had swum on the reef.</p>
+
+<p>The first hours of the morning were spent getting ready for a blow. The
+<i>Water Witch</i> was secured by springlines, and extra fenders were put
+over her side. The four hauled the Sky Wagon high onto the beach by
+sheer muscle power, then turned the plane into the wind. Rick and Scotty
+salvaged the concrete-block foundation from the wreck of the cottage
+where they had found the planks, and used the blocks for land anchors on
+the plane.</p>
+
+<p>The shutters were checked, and closed on the front of the cottage. The
+shed where the tank had broken through was repaired as well as
+improvised tools and materials allowed, and all loose gear was stowed
+inside.</p>
+
+<p>The rain came. It drove with the wind into the front of the cottage in a
+continuous thunder. Its force carried it under the door, through cracks
+beside the window frames. The Spindrifters were forced to shred rags to
+stuff into cracks. In the kitchen the roof began to leak, and soon every
+available pot and pan was being used to catch drippings.</p>
+
+<p>Rick worked almost in silence, not joining in the bantering of his
+friends. As was his way, he worried the problem of the frogmen and their
+mysterious behavior the way his dog, Dismal, would worry a bone.</p>
+
+<p>He discarded a dozen possible reasons for their actions, including
+underwater communications, bombs, and an unusual way of fishing. He
+pondered on the relations of the Spindrift group&mdash;or lack of them&mdash;with
+the frogmen and re-examined their various theories.</p>
+
+<p>First premise: The frogmen, specifically Steve's former shadow, hadn't
+recognized them or the <i>Water Witch</i>.</p>
+
+<p>Second premise: The frogmen considered them harmless tourists,
+interested only in diving to the wreck, and therefore to be watched but
+not considered dangerous.</p>
+
+<p>He rather liked that one. It would mean that the chicken had been
+dropped "mischievously," to use Zircon's word, to try to scare them out
+of the immediate vicinity. But there were other possibilities.</p>
+
+<p>First premise: The frogmen knew of their connection with Steve.</p>
+
+<p>Second premise: The frogmen weren't worried about people with JANIG
+connections.</p>
+
+<p>This might be explained by superior weapons in the hands of the frogmen,
+coupled with the assumption that the Spindrifters had no communication
+with Steve. It might also be explained by knowledge of their real reason
+for being on Clipper Cay.</p>
+
+<p>Rick didn't care much for the last two premises. The first one seemed
+more reasonable. After all, they were not sure that the former tail had
+seen the <i>Water Witch</i> in St. Thomas, or had known of their connection
+with it. On the contrary, to get to Clipper Cay so soon after the
+Spindrifters arrived, the frogman must have left about the same time the
+scientists did. There was even a possibility that he had arrived ahead
+of the Spindrift group and that the frogmen's boat had been out when
+Rick and Scotty had first spotted the diving equipment in the house.
+Anyway, there had been no sign of any tail but the Virgin Islander while
+they were around the pier and on the <i>Water Witch</i>. Either he or Scotty
+would almost certainly have spotted a second man&mdash;especially since they
+had seen him before.</p>
+
+<p>There was a major precaution, however, to be taken: he and Scotty must
+not let Steve's former tail get a good look at them. They had to assume
+he had recognized their clumsiness for what it was&mdash;a deliberate stall.</p>
+
+<p>Scotty poked him, and Rick suddenly realized that he had been leaning
+for quite a long while on the broom he was supposed to be using.</p>
+
+<p>"Made up your mind about anything?" Scotty asked.</p>
+
+<p>Rick knew his friend had been watching him. During their many adventures
+each had developed a rather unusual understanding of how the other's
+mind worked.</p>
+
+<p>"Partly," Rick replied. He told Scotty his thoughts.</p>
+
+<p>"You make sense," Scotty agreed, then added practically, "but I don't
+see what difference it makes, whether they know about our connection
+with Steve or not. The moment they catch us snooping they'll assume
+we're enemies. Until then, they'll let us alone just as they've been
+doing."</p>
+
+<p>Zircon and Scotty joined forces to prepare lunch. The temperature had
+dropped sharply, and hot soup and hamburger sandwiches were welcome.</p>
+
+<p>After lunch, Rick braved the storm long enough to go to the <i>Water
+Witch</i> for his camera. He returned to the cottage soaked to the skin.
+"We'll need diving equipment to go outside if this keeps up," he
+announced.</p>
+
+<p>He took the camera case apart and disconnected his circuits, then he
+went outside again with tools in hand and got into the Sky Wagon. The
+plane had a heater switch that would do. He removed it, leaving the
+wires to dangle for the moment. If the heater was needed he could put
+the wires together.</p>
+
+<p>That done, he sat in the plane and racked his memory for a source of
+sheet rubber. There was none, but he recalled a repair kit for the
+plastic floats in their tool supply. He found it and took it back to the
+house.</p>
+
+<p>Using the awl blade on his scout knife, he bored a hole through the
+plastic back of the case and installed the switch. Then he reconnected
+his circuits so the new switch would turn on only the infrared light. He
+waterproofed the switch as best he could, making gaskets from a rubber
+jar ring he found in the kitchen.</p>
+
+<p>He knew, however, that the switch wouldn't be waterproof under pressure.
+He took a sheet of plastic repair material from the float repair kit and
+shaped it carefully with his knife. After much trial and error he
+succeeded in cementing it onto the case so that it would protect the
+switch from the outside, but left enough slack for the switch to be
+operated through the flexible patch. Satisfied, he put it aside to dry.</p>
+
+<p>It was nearly time for dinner when he finished. He took a hand in
+cooking ham and eggs with fried potatoes, while Tony prepared a salad
+and made coffee.</p>
+
+<p>As they ate, Zircon gestured toward the front of the house. "Getting
+worse instead of letting up. This must be a hurricane, although I've
+never heard of one quite this early in the season."</p>
+
+<p>"If it gets much worse we'll have to anchor the cottage," Scotty
+observed.</p>
+
+<p>They finished just in time to tune in for the weather forecast from St.
+Thomas. According to the announcer, the storm was now centered off the
+island of St. Croix, moving in a northwesterly direction. That meant it
+would pass St. Thomas, and perhaps come very close to them. The
+announcer said, "While the storm has many of the characteristics of a
+hurricane, including the general form and wind velocities, we hesitate
+to designate it as one."</p>
+
+<p>"In other words," Tony said, "it's a hurricane but we'll call it
+something else because it's too early in the season for hurricanes."</p>
+
+<p>"Whatever it is, we'll have more of it," Zircon stated.</p>
+
+<p>Rick switched to the Navy command frequency in time to intercept a
+conversation with a destroyer somewhere off the British Virgin Islands.
+The destroyer had just lost one of its boats.</p>
+
+<p>At four minutes after six the air went silent, then a new voice took
+over the microphone. The voice said:</p>
+
+<p>"<i>A message for the ones who hunted blue sheep.</i>"</p>
+
+<p>"That's us!" Rick gasped.</p>
+
+<p>When Steve had dispatched Rick, Scotty, and Zircon to Tibet, it had been
+with the cover story that they were going to hunt the blue sheep called
+Bharals in the mountains of West China. Only Steve would know that. The
+message was from him.</p>
+
+<p>Static crackled, but the message was clear:</p>
+
+<p>"<i>The one who started the hunt needs the biggest hunter. Only the
+biggest hunter. He should be delivered as soon as possible. Call your
+usual contact before arrival and say that the doctor is coming and to
+notify the patient.</i>"</p>
+
+<p>The message was repeated, while the four strained to be certain they had
+heard every word. When normal traffic resumed, Rick switched the set
+off.</p>
+
+<p>"It appears," Zircon said slowly, "that I'm wanted."</p>
+
+<p>"Yep." Scotty grinned. "The demand is there, all right. But delivery is
+a long way off."</p>
+
+<p>The storm punctuated his words.</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XIV" id="CHAPTER_XIV"></a>CHAPTER XIV</h2>
+
+<h3>Below the Dark Coral</h3>
+
+
+<p>The sky was overcast, ceiling about two thousand feet, visibility about
+two miles. The wind was moderate and steady. Rick examined the water in
+front of the cottage and told his friends, "I can take off all right.
+But I don't want to leave without a weather report or we might find
+ourselves with no place to land."</p>
+
+<p>"I'm going to swap this radio for a newspaper," Scotty grumbled. He had
+been trying without success to get a weather report.</p>
+
+<p>Tony Briotti looked at the Sky Wagon, brows furrowed, then asked, "Rick,
+couldn't you turn on the radio in the plane and get a weather report
+from the airport at Charlotte Amalie?"</p>
+
+<p>Rick was climbing into the Sky Wagon before Tony finished. Of course he
+could! He called, "I'm a chump!"</p>
+
+<p>The set warmed and Rick called the airport, then held the phones to his
+ears to hear the reply through heavy static. When the airport answered
+he asked for a weather report for the area between St. Thomas and
+Clipper Cay. He got it, and climbed out, his face thoughtful.</p>
+
+<p>"The storm is having a pup," he told the others. "We're in a lull at the
+moment. The main storm swung off to the north, but there's another one
+right on its tail. We have just about time to get to Charlotte Amalie
+and back before the second one closes us in."</p>
+
+<p>The group went into action fast. All four pushed the plane into the
+water. Zircon ran to pack a bag, and Tony went to get the film Rick had
+taken for Zircon to carry to Steve. Scotty and Rick went through the
+check list, inspecting the plane for possible storm damage. Then Rick
+started the engine and warmed it up. By the time they were ready, Zircon
+was climbing aboard.</p>
+
+<p>Scotty yelled, "Tony and I will keep the home fires burning. Don't waste
+any time, Rick!"</p>
+
+<p>"I won't."</p>
+
+<p>Zircon closed the cabin door and Rick taxied out. In a few moments he
+was air-borne, swinging seaward over the north end of the island. He
+looked down and saw two of the frogmen. They were in front of the house,
+watching the plane.</p>
+
+<p>"Be sure to tell Steve everything," Rick reminded the big scientist,
+"and don't forget to give him the film. I won't have time to see him,
+unless he meets the plane. But it doesn't matter, because you know
+everything Scotty and I do."</p>
+
+<p>"I'll be glad to get actively to work on this confounded business,"
+Zircon stated. "I'm so curious about that brass ball the frogmen had in
+the cave that I'm about to burst."</p>
+
+<p>Rick set a compass course for St. Thomas, flying just under the clouds.
+When they were a half hour out he contacted the airport again and asked
+for the weather. The report hadn't changed. He told the airport
+operator, "The doctor is coming. Please notify the patient." He could
+almost see the operator jerk to attention as the headphones gave out a
+crisp "Roger."</p>
+
+<p>He sat down on a heavy chop at Charlotte Amalie, and the Sky Wagon gave
+them a rough ride as he taxied to the pier. Lieutenant Jimmy Kelly was
+waiting in a Navy sedan with an armed guard in attendance.</p>
+
+<p>Rick supervised the refueling of his plane at the pier gasoline depot, a
+task he would not delegate to anyone else. The presence of attendants
+made it impossible to talk to the Navy lieutenant.</p>
+
+<p>As Rick tightened the gas cap, Jimmy Kelly said, "Hop into your great
+mechanical bird and shove off, birdman. You'll just about beat the
+weather home as it is. Don't stop to fish on the way."</p>
+
+<p>"I won't. Professor Zircon will tell you an interesting story. And we'll
+be monitoring the command channel at six for any advice you can give
+us."</p>
+
+<p>"Okay. Don't get your feet wet."</p>
+
+<p>Rick waved good-by to Jimmy and Zircon, then taxied out to the clear
+area and took off. The ceiling was lower than on the trip in, and he
+almost missed Clipper Cay because of strong winds and low visibility. He
+spotted the southern tip of the island just in time to avoid going right
+on by. He landed with beads of perspiration on his forehead. If he had
+missed, with luck he might have hit Puerto Rico, but more likely he
+would have had to make a landing in the open ocean.</p>
+
+<p>Scotty and Tony came to greet him.</p>
+
+<p>"We were worried," Tony said. "It's closing in fast."</p>
+
+<p>"I got a little worried myself," Rick admitted. "Anything new here?"</p>
+
+<p>Scotty gestured toward the northern end of the island. "Our pals have
+been busy, diving. They got the brass ball, or whatever it is, and
+stowed it aboard their boat. I kept an eye on 'em through the
+binoculars. Also, I suspect they're going to do some more diving,
+because they left their equipment on the boat."</p>
+
+<p>Rick didn't particularly care at that moment. The flight back had been
+something of a strain. "Let 'em go," he said. "We can't do anything
+about it, anyway&mdash;not in broad daylight. Maybe tonight we can take a
+look."</p>
+
+<p>They spent the afternoon indoors, napping or reading, unable to swim or
+fish because the second storm had arrived on schedule. Then, a few
+minutes before six, Rick turned on the radio to the Navy command
+channel.</p>
+
+<p>At six on the nose, the radio emitted: "<i>A message for the blue-sheep
+hunters. The blue sheep seen by the big hunter and the little hunter is
+important. Obtain more information if possible. But remember that the
+owners of the sheep are also mighty hunters. The snapshots of the sheep
+were fine.</i>"</p>
+
+<p>The message was repeated. When they were sure there was no more, Rick
+switched the set off. "Well, we're in it, and with Steve's blessing. Now
+what?"</p>
+
+<p>Scotty shrugged. "Now we steal the brass ball. Didn't Steve's message
+say to get more information?"</p>
+
+<p>"Apparently the pictures turned out well, if I understood that reference
+to snapshots correctly," Tony said. "Be serious, Scotty. What can we do
+next?"</p>
+
+<p>"Keep an eye on the frogmen, I guess, and play it by ear. I can't see
+anything else to be done. We probably could steal their brass ball, all
+right, but they'd know at once who had done it because we're the only
+other people on the island."</p>
+
+<p>"Have you looked recently to see what they're doing?" Tony asked.</p>
+
+<p>Neither boy had. Both went to the front porch, but the frogmen's cottage
+was invisible through the driving rain. "We'll have to go see," Rick
+said.</p>
+
+<p>"After dark," Scotty added. "In about an hour. It will be pretty dark
+then."</p>
+
+<p>"Do you suppose the brass ball is still on the boat?" Rick inquired
+thoughtfully. "We might be able to sneak aboard after dark and get a
+picture of it from close up, and we could examine it and have something
+definite to report to Steve."</p>
+
+<p>"That's a possibility," Scotty admitted. "Anyway, we can get ready."</p>
+
+<p>Rick rechecked the camera and infrared unit. He loaded the camera with a
+fresh roll of film. Then the three sat in the living room over coffee
+and listened to the storm batter at the front of the house until it was
+nearly dark outside.</p>
+
+<p>"What now?" Tony inquired. "Do we all go? Or just one of us?"</p>
+
+<p>"No point in all of us getting soaked," Scotty said. "Have you had any
+experience in this kind of spying, Tony?"</p>
+
+<p>The archaeologist had not. He grinned. "Until I came to Spindrift, I led
+a rather quiet, academic sort of life. Except for the war, of course."</p>
+
+<p>"Then Scotty or I had better go," Rick said. "Or both of us."</p>
+
+<p>Scotty shook his head. "No need for both. It's only a reconnaissance,
+anyway. Toss you for it."</p>
+
+<p>Rick produced a coin. "All right. Call it." He flipped it as Scotty
+claimed heads. It was a tail.</p>
+
+<p>"Best two out of three?" Scotty invited.</p>
+
+<p>Rick grinned. "And after that, best three out of five?"</p>
+
+<p>Scotty growled, "All right. I'll go." He got ready by taking off shoes
+and socks. He could change his shirt and shorts when he returned. He
+slipped through the back door and was gone.</p>
+
+<p>Rick turned on the radio, tried for a weather report, and settled for a
+Miami disk jockey who was playing some good records. The static was bad,
+but the station came through clearly enough to make listening worth
+while.</p>
+
+<p>Scotty was back before a half dozen records had been played. He sat
+down, ignoring the water that dripped from him. "Listen, our friends
+just rounded the northern tip of the island in the boat and they're
+heading south just inside the eastern reef. What do you make of that?"</p>
+
+<p>Rick pictured the movements of the enemy boat from Scotty's description.
+"They can't be putting out to sea, otherwise they'd be outside the reef.
+And they're not interested in anything on the island or they'd have
+walked. I'd say they're planning to do some night diving on the eastern
+side of the island."</p>
+
+<p>"In this kind of weather?" Tony asked incredulously.</p>
+
+<p>"Sure. It's stormy on top, but once you're below the wave motion it's
+quiet as ever. They could dive."</p>
+
+<p>Scotty stood up. "If they can, so can we."</p>
+
+<p>There was no denial to that. They made a trip to the <i>Water Witch</i> and
+collected their equipment, then planned what they would do.</p>
+
+<p>"We'll all use lungs," Tony said. "We have three regulators and there
+are plenty of full tanks, enough for two dives each. However, we have
+only two pairs of glasses for the dark-light camera. I'll yield to
+Scotty as the more experienced diver, so you and he use the glasses,
+Rick. I'll stay on top, or near the top, with a single float, and a gun.
+If I use the lung I can stay submerged most of the time and not have to
+fight waves."</p>
+
+<p>"Lash yourself to the float," Scotty cautioned.</p>
+
+<p>"And we'll use a buddy line," Rick added. "The same one the professor
+and I used. Scotty, you take a gun, and I'll take the camera."</p>
+
+<p>"If I see any trouble in the making, I'll bang on my air tank," Tony
+said. "You should be able to hear that for quite a distance."</p>
+
+<p>There was nothing else to be planned in advance. They picked up their
+equipment and went out the back door into the storm, crossing the island
+through the palms. As they emerged onto the eastern shore, Scotty
+called, "Look&mdash;about five hundred yards north."</p>
+
+<p>The lights of the frogmen's boat, visible as bright halos through the
+rain, were tossing violently just inside the eastern reef. Apparently
+the boat was anchored. The rain was too thick for them to see any
+movement aboard, or to see details of the boat itself.</p>
+
+<p>"Move carefully," Rick cautioned. He had to raise his voice to be heard
+above the storm. "We haven't explored this shore. It may be full of
+coral heads."</p>
+
+<p>"I doubt it," Scotty returned. "It would be too dangerous for the boat
+in this kind of weather, even if they knew a channel."</p>
+
+<p>"Rick's right about careful movement, nevertheless," Tony replied. "We
+must move with care, especially near the reef." He indicated his float.
+"I'll never be able to tow this through that water, so I'll leave it in
+the palm grove. We can pick it up on the way back. We shouldn't need it
+with lungs, anyway. Do you boys have rescue packs?"</p>
+
+<p>The packs were plastic floats compressed into packages no larger than a
+cigarette pack. They contained a carbon-dioxide cartridge and could be
+inflated simply by squeezing them, which punctured the cartridge. The
+boys had carried them on their weight belts for so long that they took
+them for granted.</p>
+
+<p>They donned their equipment, then walked down to the beach. The surf was
+not heavy, since the wind was blowing from the opposite side of the
+island. Nevertheless, there was enough water motion to lift a fine
+screen of sand and dust.</p>
+
+<p>"The camera will be useless until we get into deeper water," Rick
+called. "Let's rope together and swim straight out."</p>
+
+<p>They waded in, awkward in the fins, until they were deep enough for
+swimming. Then all adjusted mouthpieces and started out. Rick tried the
+infrared light intermittently, but not until they were in about twenty
+feet of water did the roiled bottom allow its use. He led the way to the
+reef, the others following in file.</p>
+
+<p>The reef was closer to the surface than on the western side. Rick had to
+swim along it until he found a place where they could cross without
+being buffeted by breakers. Once across, he swam down the face of the
+reef, knowing that the trip was hard on Tony, because the underwater
+world was completely dark to one without light, or glasses with which to
+see the infrared illumination.</p>
+
+<p>Rick found a fairly level shelf at about thirty feet and swam along it,
+keeping close to the reef wall, until he thought they were in the
+vicinity of the frogmen. Then he pulled twice on the tie rope in a
+signal to surface, knowing that Scotty would pass the signal along to
+Tony.</p>
+
+<p>He emerged in a rough sea, only yards from the point on the reef
+opposite the anchored boat. He was in time to see two frogmen climb down
+the boat's ladder. They got into the water and the third man, on deck,
+lowered the brass object to them.</p>
+
+<p>Rick had no fear that they would be seen from the boat. Their heads
+would be hidden by the breaking waves, and their bubbles would merge
+with the natural foam.</p>
+
+<p>He saw at once what their tactics should be. He pulled Scotty and Tony
+to him, then let his mouthpiece drop. Putting his lips close to their
+ears, he said softly, "If it's like last time, they won't be down long.
+Scotty and I will track them to find out where they go, and watch what
+they're doing. Then, after they leave, we'll see if they left anything
+behind."</p>
+
+<p>Scotty and Tony nodded. Tony untied the line that had held him to
+Scotty. Rick replaced his mouthpiece, cleared a little mist from his
+face mask, and led the way down.</p>
+
+<p>This time the infrared light operated continuously. Now and then Rick
+worked the toggle switch through its loose plastic covering and shut the
+unit off while he searched for visible light. He found it, far down the
+face of the reef.</p>
+
+<p>The camera made it easy, and his mind was at rest because this time
+nature had made it impossible for their bubbles to give them away to
+surface watchers.</p>
+
+<p>There were heavy swells on the surface. He knew it because of the
+pressure surges on his ears. But otherwise there was no sign of the
+storm. He grinned because he suddenly realized that he felt dry. On the
+surface, with the rain beating at him, he had felt like a drowned
+kitten.</p>
+
+<p>Moving with the confidence gained in his first experience, he led the
+way seaward, then went to the level of the light. Soon they were close
+enough to see the frogmen working over something on a coral ledge on the
+reef face. They hovered motionless, watching, and as one of the frogmen
+moved they saw that it was the brass ball.</p>
+
+<p>Rick started his camera. He had an advantage, because the frogmen were
+concentrating on what they were doing, their backs to him. He moved in
+cautiously, camera grinding, then backed away again when he thought he
+had enough long shots.</p>
+
+<p>One frogman moved away a few feet, and Rick's breathing stopped as the
+man's belt light flashed toward him. Had the frogman been looking, he
+could have seen the boys, but he was too interested in the second
+frogman's actions.</p>
+
+<p>The second frogman crouched over the brass object, hand moving.</p>
+
+<p>Rick recoiled as a wail lanced through his head with painful impact. He
+felt the rope tighten as Scotty involuntarily drew away.</p>
+
+<p>It was not the octopus, then! It was the brass ball that wailed. But
+why? For what possible reason?</p>
+
+<p>The frogmen were apparently satisfied. One of them picked up the
+powerful light they had been using and turned it off. Then, with only
+belt lights, they started back up the reef.</p>
+
+<p>Rick waited until the lights were no longer visible. He glanced at his
+depth gauge and wrist watch. They were at eighty feet, and they had
+plenty of air left. He swam to the brass ball, camera grinding.</p>
+
+<p>He had never seen anything quite like it. The brass sphere was mounted
+on a box about twelve inches square and six inches high. From the
+sphere, two rounded projections thrust out. He identified a waterproof
+switch on the box, and two small knobs mounted on calibrated plates.
+These were obviously controls, but he had no idea what they controlled.</p>
+
+<p>Steve would want a few close-ups. Rick worked his camera focus and took
+shots from every angle. When he had enough, he pulled twice on the rope
+in a signal to surface. Scotty motioned to him to lead the way.</p>
+
+<p>As Rick started up, four metallic clangs, irregularly spaced, rang
+faintly in his ears.</p>
+
+<p>Tony, banging his tank in the signal for trouble! Rick instantly changed
+course and followed the bottom, watching the water overhead for any sign
+of the frogmen. When he had reached a spot below the point on the reef
+where Tony should be waiting, he turned toward the surface, moving
+slowly, searching for any sign of activity. There was no sign of
+whatever had alarmed Tony.</p>
+
+<p>He paused a few inches under the surface, then carefully put his face
+into the air. Scotty surfaced beside him.</p>
+
+<p>There was no sign of Tony. Rick peered through his mask and saw that the
+boat was still anchored in the same place. There were figures on its
+deck. Four of them&mdash;Four! He ripped his mask off for a clearer look, and
+his heart skipped a beat. The frogmen had Tony!</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XV" id="CHAPTER_XV"></a>CHAPTER XV</h2>
+
+<h3>How Sings the Gay Sardine?</h3>
+
+
+<p>Rick and Scotty held a hurried consultation, mouth to ear.</p>
+
+<p>"We'll have to get him," Scotty whispered urgently. He held up his spear
+gun. "I've only got one shot in this."</p>
+
+<p>Rick's instinctive reaction was the same. They had to rescue Tony! But
+they also had a job to do.</p>
+
+<p>"Wait," he cautioned. "They probably don't know we're here. Tony
+wouldn't give us away. If they find out, we'll lose the pictures, and we
+may make it worse for Tony. Let's stay right here and watch."</p>
+
+<p>Scotty subsided. They floated motionless, eyes on the boat, peering to
+penetrate the mist. The rain had let up somewhat, but the air was far
+from clear.</p>
+
+<p>Rick would have given the treasure they sought to be able to hear what
+was being said on the boat. The three frogmen were all facing Tony, and
+the conversation seemed to be pretty animated. Then, as he watched, the
+boat pulled up anchor. It moved north.</p>
+
+<p>"They're taking him to their house," Scotty gasped.</p>
+
+<p>The boys swam frantically for shore, recklessly crossing the reef
+without regard to the danger of cutting themselves on the sharp coral.
+They reached the beach and shed tanks and equipment under the palms,
+then raced for the frogmen's house.</p>
+
+<p>They could see the lights of the boat as it rounded the northern tip of
+the island, and, lying among the palms, they watched it tie up at the
+pier. Tony and the three frogmen got off and walked down the pier. Rick
+strained to see, and could not find any sign that Tony was covered by a
+gun. But that wouldn't be necessary, anyway, since he was outnumbered
+three to one.</p>
+
+<p>The four marched up to the front door of the frogmen's house and
+stopped. The boys were prone under a palm less than twenty feet away.
+One of the frogmen said, "Let me get a jacket. I'm getting chilled. Then
+we'll walk you home."</p>
+
+<p>There was something very odd here! Rick nudged Scotty and they backed
+slowly away. When they were sure they could not be seen, they stood up
+and ran on silent bare feet through the palm grove, circling to approach
+their own cottage from the rear.</p>
+
+<hr style="width: 65%;" />
+<div class="figcenter">
+<a name="illus6" id="illus6"></a>
+<img src="images/illus6.jpg" alt=""/>
+</div>
+
+<h3><i>Rick nudged Scotty to back away</i></h3>
+<hr style="width: 65%;" />
+
+<p>At the back door they paused. "Now what?" Rick said helplessly. "They're
+bringing him home. Why?"</p>
+
+<p>"I wondered about that while we were running. I think they're bringing
+him home to check up on us. He must have sold them some kind of yarn."</p>
+
+<p>"Steve's tail will recognize us!"</p>
+
+<p>"Not if we're in bed," Scotty answered quickly. "We'll pretend to be
+asleep. Come on."</p>
+
+<p>"Just a minute." Rick hurried to the shed and got two short hand spears.
+He handed one to Scotty. "Here. Have a bedfellow."</p>
+
+<p>A few minutes later they heard footsteps and voices on the front porch.
+The door opened. A strange voice said, "Your friends don't seem to be
+here." The voice hardened. "I thought you said they were?"</p>
+
+<p>"They're probably in bed," Tony replied mildly. "We go to bed right
+after dark because there's nothing to do."</p>
+
+<p>"Except stick your nose in other people's business," a harsh voice
+snapped.</p>
+
+<p>Tony replied tartly, "I've already apologized for letting my curiosity
+get the better of me."</p>
+
+<p>"I'd like to see the bedrooms," a third voice said. Rick thought it
+belonged to the man they had taken off Steve's tail.</p>
+
+<p>He lay motionless as a form blocked out the lamp-light from the living
+room. In a moment the voice said, "They're asleep, all right. They must
+sleep soundly."</p>
+
+<p>"Young men do." Tony sounded relieved.</p>
+
+<p>Rick grinned to himself. The archaeologist couldn't have known they were
+in bed, but his stall had worked.</p>
+
+<p>"All right. We'll be going. But keep in mind that the most stupid thing
+anyone can do is to dive alone, even by day. At night it's worse than
+stupid. It's sheer insanity. Also, we'll thank you and your party to
+keep away from us and not gum up our recordings with your flipper noises
+and bubble sounds."</p>
+
+<p>"We will," Tony said. "Good night."</p>
+
+<p>The front door closed. Scotty rose, slid open the window, and went out.
+Tony scraped a chair in the living room. Rick stayed where he was, in
+case the frogmen had lingered outside. In a few moments he heard the
+back door open and close, and he tensed, but it was Scotty's voice that
+spoke.</p>
+
+<p>"They're gone. I just wanted to make sure."</p>
+
+<p>The three gathered in the living room, and Tony chuckled. "If I
+associate with you two for much longer, I'll get to be the world's
+champion dissembler."</p>
+
+<p>"What happened?" Rick demanded.</p>
+
+<p>"Simple and unlucky. The two frogmen surfaced practically under me. My
+own fault, because I had moved much closer to the boat. I think one of
+them almost fired a spear at me, but the other stopped him. They invited
+me to go aboard, and I didn't think it wise to refuse the invitation."</p>
+
+<p>"I imagine not," Rick commented grimly. "Then what?"</p>
+
+<p>"Naturally, they demanded to know what I was doing. I admitted to
+overpowering curiosity that got the better of my manners. They wanted to
+know who I was and why I was on the island. I told them the truth, of
+course, at least partly. I identified all of us. Then I'm afraid I told
+a slight untruth. I said we had found reference to the <i>Maiden Hand</i> in
+an old manuscript, and were diving in hopes of finding cannon and other
+old things which we planned to sell for museum pieces to pay for our
+vacation. I believe they accepted my story."</p>
+
+<p>"It's a good story," Scotty approved. "Just enough truth to make it ring
+true."</p>
+
+<p>"They've been watching us," Tony went on. "They asked why the plane had
+gone, and why it had come back with only the pilot. I told them
+Professor Zircon had cut himself and gotten a coral infection, and that
+the doctor at Charlotte Amalie felt that he should stay there for
+treatment."</p>
+
+<p>"I guess they haven't recognized Scotty and me as the two who stopped
+Steve's tail."</p>
+
+<p>"Seems not," Tony agreed. "Well, I admitted that I was still curious
+about their activities, since night diving is not common. So they told
+me a story."</p>
+
+<p>The boys waited breathlessly.</p>
+
+<p>"These gentlemen thirst for scientific knowledge," Tony said with a
+grin. "They claim an interest in ichthyology, but they know less about
+fish than any cat does. Their story is that they have developed an
+underwater recording device with which to make recordings of fish
+noises. Since they have some evidence that certain fish make their
+noises only at night, it is obviously necessary to make recordings at
+night. So they dive, leave their equipment, and pick it up the next
+morning. Our diving too close to their gadget creates false sounds,
+especially our bubbles. Therefore we are requested politely but firmly
+to stay away."</p>
+
+<p>Scotty whistled.</p>
+
+<p>Rick laughed. "Quite a story," he said.</p>
+
+<p>"I pointed out the obvious," Tony went on, "that it was strange they
+should choose a stormy night. Their answer was that storms upset fish,
+and they thought it possible that some sounds might be obtained only
+under storm conditions."</p>
+
+<p>"Very interesting," Rick remarked. "It's a good story, and if we didn't
+know Steve was after at least one of those men, we'd probably believe
+it!"</p>
+
+<p>"Fish noises!" Scotty exclaimed. "If they knew we'd been snooping around
+before, they'd probably claim that the octopus really did wail, and that
+they were only recording him. Your gag about screaming squid and
+burbling barracuda would appeal to them, Tony."</p>
+
+<p>The archaeologist chuckled. "Anyway, we got out of that one pretty well.
+I had a little trouble banging my tank. Didn't want to do it overtly, of
+course. Finally I managed to get in position while we were swimming to
+the boat, and I banged my tank against one of theirs. But how did you
+know what to do?"</p>
+
+<p>Rick explained briefly, then he broke into a smile again. "These guys
+are smart," he declared. "I like that fish-recording story."</p>
+
+<p>"It's appealing," Tony admitted. "I'm almost tempted to pay them another
+call tomorrow to ask if they have captured for posterity the hunting cry
+of the wild sea trout, or the love song of the gay sardine."</p>
+
+<p>"But you won't," Scotty said practically. "You certainly came out of
+that mess with a whole skin, Tony."</p>
+
+<p>Rick laughed. "He's adventure-prone. And lucky. How do you beat a
+combination like that?"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XVI" id="CHAPTER_XVI"></a>CHAPTER XVI</h2>
+
+<h3>The Deadly Spring Gun</h3>
+
+
+<p>The storm blew itself out by noon of the following day, leaving an
+overcast sky and heavy swells. An inspection with the binoculars showed
+that all was quiet at the frogmen's house. Their boat was tied to the
+pier.</p>
+
+<p>"They probably recovered the brass ball during the night," Rick
+observed, "or perhaps early this morning."</p>
+
+<p>"The question is," Scotty remarked, "did they take the gadget to the
+octopus cave?"</p>
+
+<p>Tony joined them on the porch in time to hear Scotty's query. "I can
+shed some light on that. It happens that I woke up at dawn and looked
+out to see how the weather was behaving. The frogmen were anchored off
+the eastern reef in the same place. We can assume that they picked up
+the brass ball and put it back in the cave near the wreck."</p>
+
+<p>Rick rubbed his hand over his short hair in a gesture of bewilderment.
+"But what's their game? What do they get from the brass ball?"</p>
+
+<p>"I rather imagine Steve Ames would like to know the same thing. If you
+boys have no objection, I think I'll spend the afternoon at my midden.
+What are you planning?"</p>
+
+<p>Rick looked at Scotty. "Dive at the wreck?"</p>
+
+<p>"Sure. Frogmen or no frogmen, there's still a golden statue of St.
+Francis somewhere down there."</p>
+
+<p>After lunch the boys checked their equipment, being particularly careful
+because they had not rinsed out the regulators with fresh water after
+every dive. Their small supply of water, coupled with the odd hours at
+which the equipment had been used, was the reason. They took a little
+water from their supply and used it to clean the regulators. The rest of
+the equipment would just have to wait.</p>
+
+<p>Tony departed for his Indian midden, tools slung over his shoulder. The
+boys started the compressor to fill the tanks used the previous night,
+then untied the <i>Water Witch</i> and headed for the diving area. Scotty
+scanned the frogmen's house through the glasses, but saw nothing of
+interest.</p>
+
+<p>They anchored just outside the reef and looked for their buoy. It was
+gone, probably torn away by the storm.</p>
+
+<p>"We can find the wreck again," Rick said. "No trouble. I could find my
+way around here in the dark." He grinned. "I have!"</p>
+
+<p>"Shall we take a look in the octopus cave too?"</p>
+
+<p>"A quick one. I doubt that we'd see more than we saw last night. Our job
+now is finding out what kind of information the frogmen get. And I don't
+know how we'll do that."</p>
+
+<p>"Wait for a break," Scotty replied. "Come on. Let's get into the water."</p>
+
+<p>It was cold. The storm had blown in colder water from the open sea. Rick
+felt goose flesh and wished they had brought along midseason suits.</p>
+
+<p>The water was murky, too, because of the sand and silt stirred up by the
+storm. The murkiness started about twenty feet below the surface. Not
+until they were over fifty feet down did the water clear again. The
+light was reduced somewhat by the murk, but visibility was good. Rick
+had brought his camera to take motion pictures around the wreck. There
+would be enough light.</p>
+
+<p>Scotty carried the big jet spear gun. It was powerful enough to spear
+sharks or big barracuda, just in case the frogmen decided to be
+"mischievous" again.</p>
+
+<p>Rick led the way to the octopus cave, glancing up now and then to make
+sure they were alone in the water. The little octopus was in his usual
+position on the ledge.</p>
+
+<p>Scotty, spear gun extended, swam right into the cave. Rick followed,
+holding the camera tightly to his chest to keep it from scraping on the
+coral. Scotty had his flashlight going, so Rick didn't bother with his
+own.</p>
+
+<p>The cave was just about large enough for both of them. It was a typical
+coral formation, not much different from the reef outside, except that
+the brass ball was in the center of the rough floor.</p>
+
+<p>The boys examined the cave thoroughly and saw nothing of interest. Rick
+pushed at Scotty's shoulder and swam out again. Scotty followed. The
+octopus watched them go.</p>
+
+<p>The wreck of the <i>Maiden Hand</i> was just as they had left it, and the
+grouper was back in his comfortable cabin. He departed at high speed as
+the boys appeared. They had agreed to start work aft of the captain's
+cabin, and the wrecking bars were carried under their tank harnesses for
+the purpose. Both were convinced that there was nothing more to be found
+in the cabin, although the possibility remained that false boards in the
+floor or walls might conceal the statue.</p>
+
+<p>Rick tied his camera to a projection, then took his wrecking bar and
+looked for a place to start. Scotty pointed to a place where there were
+boards aft of the cabin they had already uncovered, and they started to
+work.</p>
+
+<p>By the time they had pried off the first few boards it was time to
+surface. They went topside and changed tanks, then rested for half an
+hour. There was no sign of activity at the frogmen's house, nor could
+they see Tony at work on his midden, since the location was hidden by
+palms.</p>
+
+<p>Rick said thoughtfully, "The brass ball might be some kind of signaling
+device."</p>
+
+<p>"What kind of signals?"</p>
+
+<p>He didn't know the answer to that. "Anyway, since it's underwater, if it
+sends out anything it must be sound impulses. Otherwise we wouldn't hear
+it wail. And what good is sound if not for signals?" added Rick.</p>
+
+<p>"Sonar," Scotty reminded.</p>
+
+<p>The boys were familiar with sonar because of the Spindrift work on the
+Submobile. Very high frequency sound impulses were sent out, and the
+echoes were timed or used in other ways. It was the way in which bottom
+tracings were made by surface craft, and the way in which Navy ships
+detected submarines. It could be used for locating schools of fish.</p>
+
+<p>"It could be sonar of some kind," Rick agreed. "But what good would it
+do anyone to stick a sonar device on an island like this?"</p>
+
+<p>And there speculation stopped again, the question still unanswered.</p>
+
+<p>They dove to the wreck and continued the hard labor of taking the aft
+end of the ship apart. When they finally got the new area cleared of
+rotted boards and timbers it was only to find a cabin already filled
+with sand.</p>
+
+<p>Rick borrowed the spear from Scotty's gun and thrust it down into the
+sand. It slid in easily, meeting no obstruction. He probed with it but
+found nothing except more sand.</p>
+
+<p>Discouraged, he wrote on his belt slate, "Mybe no bottm. Flr of cbn my
+be gne."</p>
+
+<p>Scotty nodded. He lifted his hands in a gesture of inquiry. Now what?</p>
+
+<p>Rick thought about it for a moment. Tony had been right! They probably
+would have to remove every board in sight, carrying the ship away piece
+by piece. But then what? There was the distinct possibility that the
+statue was somewhere under sand, and they had no way of removing the
+sand to see.</p>
+
+<p>It was apparent that most of the ship was under the sand&mdash;if the
+remainder of the ship was still intact. But Rick couldn't escape the
+feeling that Captain Campion would have kept the statue close to him.
+And that meant in the aft part of the ship, the part that was exposed.</p>
+
+<p>Scotty hooted twice, pointing at his watch. It was time to surface. The
+next dive would be their last for the day.</p>
+
+<p>On the surface, Rick sounded discouraged as he said, "The cabin we
+uncovered might not even have a deck. There may be nothing but a mile of
+sand under it. And there isn't much of the aft part of the ship left to
+explore, either. I guess tomorrow we can plan to take the captain's
+cabin apart board by board."</p>
+
+<p>"We'll need Tony and Zircon for hard labor like that," Scotty answered.
+"Notice how quickly you get tired down there? Also, we use air a lot
+faster when we work."</p>
+
+<p>"Let's just sort of make a survey this time," Rick suggested. "We can
+probe for any cracks we might have missed, and I'll take some over-all
+shots of the wreck. Then we'll call it a day."</p>
+
+<p>They followed Rick's plan. He took pictures of Scotty, with wrecking
+bar, prying at likely places in the exposed part of the ship. But Scotty
+uncovered nothing of interest. In one place his prying disturbed another
+moray, who demonstrated his anger at the intruders by trying to fasten
+his needle teeth in the wrecking bar.</p>
+
+<p>A metallic clang caused them to lose interest in the eel suddenly. They
+looked at each other, then turned and swam toward the apparent direction
+of the sound. At that moment a distant wail struck their ears.</p>
+
+<p>The brass ball!</p>
+
+<p>Rick wondered. He had heard no boat noise. The brass ball must be
+operating automatically. He hooted for Scotty's attention, then pointed
+toward the cave.</p>
+
+<p>Scotty checked his spear gun and motioned for Rick to lead. Rick pushed
+his camera in front of him and made his fins move rapidly. There might
+be some outward sign when the ball sounded, something that would tell
+them a little about its mechanism or purpose.</p>
+
+<p>As the cave came in view he coasted, looking upward. The murky layer
+prevented his seeing very far, but there was no one in sight. He let
+inertia carry him toward the cave, then swung upright in the water as he
+saw that the octopus had moved a little distance from the cave mouth.</p>
+
+<p>Instinctively Rick knew that something was wrong, but it was too late to
+get out of harm's way.</p>
+
+<p>A frogman emerged from the cave, spring-type spear gun pointed directly
+toward them. The frogman held the brass instrument in his free hand.</p>
+
+<p>Even as Rick hooted a warning, the frogman fired!</p>
+
+<p>His spear lanced through the water directly at Scotty!</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XVII" id="CHAPTER_XVII"></a>CHAPTER XVII</h2>
+
+<h3>Trapped in Twenty Fathoms</h3>
+
+
+<p>Scotty writhed to one side, and the fact that the frogman had fired from
+too great a distance gave him time to dodge. The spear went by, and
+Scotty lifted his own gun to return the shot.</p>
+
+<p>Rick, senses suddenly acute, glanced upward again in time to see two
+more figures descending through the murky layer. He hooted for danger!</p>
+
+<p>Scotty glanced up, too. Then, instead of firing, he sped forward and
+thrust the tip of his spear at the frogman's chest. The frogman lifted
+his hands high. Scotty jerked the man's face plate loose, then turned
+swiftly and motioned to Rick.</p>
+
+<p>Rick followed, fins driving, as Scotty led the way into deeper water in
+the direction of the wreck.</p>
+
+<p>The frogman who had been in the cave was temporarily out of things. His
+Scuba was the type that combined the breathing apparatus with the full
+face plate. He could clear the face plate of the water Scotty had let
+in, but it would take a little time.</p>
+
+<p>Suddenly Scotty shot upward. Rick turned and looked over his shoulder as
+he followed. The second two frogmen were in clear water now, and both
+had spear guns!</p>
+
+<p>Scotty led the way into the murky layer, then leveled off and swam
+horizontally. Rick wondered what kind of evasive action his pal was
+planning, but he followed without trying to communicate with the other
+boy. In a situation like this, Scotty's instincts were dependable.</p>
+
+<p>Rick stayed close to Scotty in the murky layer, swimming at his side and
+a little behind. After a few yards Scotty dove again, into clear water.
+Rick looked around but could see no sign of the enemy. Apparently the
+frogmen had followed and were still in the murk.</p>
+
+<p>Scotty shot downward, Rick at his side. The wreck was directly below
+them. Scotty didn't hesitate. He let his momentum carry him right
+through the grouper's front door into the cabin. Rick followed, half
+expecting to see Scotty and the grouper meet head on, but the fish
+hadn't returned.</p>
+
+<p>Inside the cabin, Scotty switched on his flashlight, took his slate, and
+wrote, "Thyl thnk we wnt bk to bot. We sty hr lng nuff thy fnd out we nt
+thr &amp; cm bck lkng fr us. Thn we go up to bot."</p>
+
+<p>Rick nodded his understanding. It was good strategy, provided they timed
+it right. The frogmen would assume the boys had returned to the <i>Water
+Witch</i> when they went up through the murky layer. They would examine the
+boat, then dive down again. At that time, if he and Scotty could time it
+right, the two groups would pass in the murky layer and the boys would
+emerge while their enemies were still descending.</p>
+
+<p>He looked at his watch. They had only a few minutes of air left. The
+frogmen would have more air, not only because they had entered the water
+after the boys were already on the bottom, but because they had not
+descended so deeply.</p>
+
+<p>He wrote, "Rlax. Brethe easy."</p>
+
+<p>The less effort they made, the longer their air would last. For a moment
+he debated suggesting that they share one tank by trading the mouthpiece
+back and forth, but that would leave one of them practically without air
+when they had to leave. He tried to imagine the movements of their
+enemies. The frogmen would be on the surface now, approaching the boat
+ladder with caution. They couldn't be sure the boys were not waiting in
+ambush.</p>
+
+<p>Both boys had switched off their lights and were resting motionless in
+the darkness of the cabin. A little light filtered through the hole near
+the roof, but not enough to see by.</p>
+
+<p>Suddenly the light was blocked out!</p>
+
+<p>Rick reached for his belt knife and Scotty thrust the spear gun forward,
+then both relaxed a little. The grouper had returned.</p>
+
+<p>The big fish turned at the opening and backed into his hole. He hovered
+in the opening, holding position while he stared out into his watery
+kingdom. Apparently the fish had no idea that the boys were in the
+cabin. When it came time to leave and they touched him or hooted at him,
+he would get the surprise of his life.</p>
+
+<p>Even in their predicament, Rick could see the humor in the grouper's
+reaction. He wondered if groupers were subject to heart failure from
+shock.</p>
+
+<p>Rick returned to trying to imagine the movements of the frogmen. Now
+they would be cautiously boarding the <i>Water Witch</i>, one up the ladder,
+the other climbing the anchor chain. They would be careful, still unsure
+whether or not the quarry was aboard.</p>
+
+<p>He thought he felt constriction in his lungs from the warning signal
+that his air was running out, but finally decided it was only his
+imagination.</p>
+
+<p>Now the frogmen would be aboard the <i>Water Witch</i>, making a quick
+search, spear guns ready to fire their lethal shafts. Now they would be
+in the cabin and shouting their disappointment.</p>
+
+<p>Now the frogmen would be hurrying back into the water, readjusting their
+face masks, ready to dive.</p>
+
+<p>The grouper shot out of the cabin with a flick of his powerful tail that
+raised the silt around them.</p>
+
+<p>Rick's heartbeat faltered. The grouper had been alarmed. They had
+mistimed!</p>
+
+<p>Right now, the frogmen were outside the <i>Maiden Hand</i>!</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XVIII" id="CHAPTER_XVIII"></a>CHAPTER XVIII</h2>
+
+<h3>The Fight on the "Maiden Hand"</h3>
+
+
+<p>They had only one hope now&mdash;that the frogmen would make a quick survey
+of the wreck, then go away. The boys waited tensely, ears alert for any
+sound that would tell them the whereabouts of their enemy.</p>
+
+<p>There was only the sound of their bubbles.</p>
+
+<p>Rick pressed close to the opening and peered out. The water that could
+be seen from the entrance was clear. However, it was only a narrow
+sector. For all he knew, the frogmen might be right overhead.</p>
+
+<p>He backed down into the cabin and pushed his camera into a corner. He
+could get it later. Right now he preferred to have both hands free. He
+wished for a spear gun, to double their armament. But the other guns
+were on the <i>Water Witch</i>. The wrecking bars were useless, too. It was
+almost impossible to strike a blow against the resistance of the water.</p>
+
+<p>Something scraped outside, and both boys froze. There was no doubt that
+the frogmen were at the wreck. Why didn't they go away? They couldn't
+know about the entrance to the cabin&mdash;or could they?</p>
+
+<p>The moments dragged by. There couldn't be much air left in their tanks.
+Rick risked holding his wrist close to the opening and saw that his
+watch showed one minute of diving time before shortness of breath would
+signal time to turn on their air reserve and surface.</p>
+
+<p>Time was critical. If the frogmen didn't go away before their air ran
+out, they would have to surface, if they were allowed to by the enemy.
+With luck, Scotty could account for one. But that would leave two, both
+armed. By this time the first frogman would have blown the water from
+his mask and recovered his spear.</p>
+
+<p>No, it would be dangerous for Scotty even to take time for a shot,
+unless he could fire without pausing. Their best bet was to make a run
+for it, depending on speed.</p>
+
+<p>On land, he was sure he and Scotty could outrun the enemy, but in the
+water, speed depended on skill with the fins, and the power of leg
+strokes. He doubted that the frogmen were much faster than he and
+Scotty, but there was an excellent chance that their speed in the water
+was equal.</p>
+
+<p>He conserved his air, spacing his breathing, taking only enough air to
+keep comfortable.</p>
+
+<p>There was another scraping sound, and he knew the frogmen were still
+around. Were they actually searching the wreck? If so, they might find
+the entrance.</p>
+
+<p>And then Rick suddenly discovered a new danger!</p>
+
+<p>Their air bubbles had been floating to the top of the cabin, forming a
+pool under the ceiling. But they had stayed in the cabin so long that
+enough water had been displaced to bring the pool of exhausted air close
+to the entrance, which was only a few inches below roof level.</p>
+
+<p>In a moment the air would spill out, and rising bubbles would warn the
+frogmen!</p>
+
+<p>He gripped Scotty's shoulder and pointed to the silvery mass of
+exhausted air that curled perilously close to the entrance.</p>
+
+<p>The other boy saw the danger at once. He wrote on his slate, "We go whn
+air duz," and held it in the light for Rick to see.</p>
+
+<p>Rick nodded. He drew his belt knife.</p>
+
+<p>There couldn't be many breaths left before the air spilled out. Nor
+could there be many before warning constriction forced them to turn on
+the reserves. At this depth the reserve wasn't very great.</p>
+
+<p>He saw Scotty reach for his reserve lever and pull it down. A moment
+later he had to pull his own.</p>
+
+<p>Something rang like a struck tank, almost directly overhead!</p>
+
+<p>The lip of the bubble pool moved from the water motion caused by pulling
+their reserves. Rick watched it, scarcely breathing.</p>
+
+<p>The air pool trembled. A tiny bubble broke loose and sped upward.</p>
+
+<p>Rick squeezed Scotty's arm, then with a powerful thrust of his flippers
+he shot out into light, right into the stomach of a frogman!</p>
+
+<p>He thrust with his knife, and a hand gripped his wrist and twisted.
+Scotty shot from the hole in the wreck and turned, fins flailing. His
+spear gun belched carbon dioxide, and the deadly spear ripped into the
+leg of one frogman.</p>
+
+<p>Rick flailed arms and legs, trying to break free of the grip that held
+him. He saw the wounded frogman fire his spear at Scotty. The boy moved
+just in time, and the shaft shot between his arm and side.</p>
+
+<p>Scotty let go of his useless gun and grappled with the frogman, reaching
+for his knife with one hand while he gripped the frogman's wrist with
+the other.</p>
+
+<p>Rick knew their air was running out fast. He felt a knife glance from
+his tank and heard the ring of metal. He struggled for footing and
+turned in time to thrust a flippered foot into the stomach of the
+frogman behind him.</p>
+
+<p>Next to him he caught a glimpse of Scotty and his opponent rolling in
+the water, and he saw the shimmer of metal as a knife flashed.</p>
+
+<p>Arms locked around his throat. He reached backward over his head and his
+hands touched rubber. He gripped and pulled with all his strength and
+felt the man's face plate come free.</p>
+
+<p>The frogman who had lost his mask suddenly threw off tanks and weight
+belt and sped for the surface.</p>
+
+<p>The odds were even! Rick locked with his opponent and felt powerful arms
+drag him close. The man had more strength than he! He fought to break
+loose, and couldn't!</p>
+
+<p>Then the mouthpiece was pulled away from Rick's lips in mid-breath, and
+he choked on sea water.</p>
+
+<p>Without air&mdash;twenty fathoms down!</p>
+
+<p>Frantically he fought, locking his air passage so his last lungful
+couldn't escape. He got a hand free and caught his opponent's hose where
+it joined the tank. He pulled with all his strength and felt it give.
+Bubbles rose in a cloud.</p>
+
+<p>He would have sobbed if he could. It was the wrong hose! He had only
+torn loose the exhaust. He groped and found the intake hose, then,
+lifting his knee and thrusting for leverage, he pulled with all his
+strength. The hose gave! The grip on him loosened.</p>
+
+<p>Rick was now desperate for air! He pulled the quick release on his
+weight belt and felt it drop away, then he kicked for the surface,
+frantic with fear for Scotty. Had he gotten free? Had he? His last view
+had been of his pal locked with the remaining frogman!</p>
+
+<p>Bubbles streamed from his mouth as the compressed air in his lungs
+expanded under the decreasing pressure. He let himself exhale as he
+rose, fighting against panic and the impulse to lock the remaining air
+in his lungs. That would be fatal, he knew, and he willed himself to act
+properly. He kept his fins moving, knowing that, if he kept his head, he
+would make the surface.</p>
+
+<p>He passed through the murky layer and saw the surface like a wrinkled
+silver sheet far overhead. Straining, he swam for it, letting out his
+breath as the pressure on his lungs demanded.</p>
+
+<p>There was another boat hull in the water, almost over him! He angled
+away, to avoid coming up under it.</p>
+
+<p>And suddenly there were forms around the boat. A cry tore from his lips
+and was swallowed in the water.</p>
+
+<p>More frogmen! More enemies, when they were already defeated!</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XIX" id="CHAPTER_XIX"></a>CHAPTER XIX</h2>
+
+<h3>JANIG Takes to the Water</h3>
+
+
+<p>A figure dove to meet Rick. He angled away, fighting the impulse to
+breathe, keeping the compressed air moving out of his lungs. The figure
+angled with him, then suddenly sheered off. Rick shot past and the
+figure followed.</p>
+
+<p>These new frogmen were diving in midseason suits. He was aware of nearly
+a dozen of them. He didn't count them; with his terrible need for oxygen
+he didn't care that much.</p>
+
+<p>He knew he would make it. He had to! But where was Scotty?</p>
+
+<p>Rick shot to the surface, went right through it, his impetus carrying
+him into the blessed air. He gulped a great lungful before he fell back
+with a splash, and as he hit water his fins were flailing, to carry him
+toward the hastily glimpsed shore.</p>
+
+<p>A masked figure surfaced beside him and called, "Take it easy!"</p>
+
+<p>He only moved faster. The frogman caught him easily, because the power
+was gone from his leg strokes now. But he had enough strength to fight.
+He reached for the frogman's face plate, and a strong arm pushed him
+back.</p>
+
+<p>A voice penetrated his consciousness. "Stop it, Rick, or I'll have to
+let you have one."</p>
+
+<p>The frogman knew his name! He hesitated, fist pulled back to throw the
+best punch he had left, and the new frogman back-pedaled.</p>
+
+<p>"Hold it," the frogman called, and lifted his face mask.</p>
+
+<p>Rick stopped moving, staring numbly.</p>
+
+<p>Jimmy Kelly! Lieutenant Kelly!</p>
+
+<p>"I'll tow you to the boat," the lieutenant called. "Relax."</p>
+
+<p>Rick obeyed, head spinning. He was a little groggy, and he couldn't make
+sense out of things. How had Kelly got here?</p>
+
+<p>And Scotty! Where was Scotty? He started struggling again, calling his
+friend's name.</p>
+
+<p>"He's all right," Kelly said urgently. "Relax, Rick!"</p>
+
+<p>Rick caught the words, and they penetrated. How did Kelly know Scotty
+was all right? But the lieutenant had spoken with authority, so he
+relaxed.</p>
+
+<p>Kelly towed him to the landing stage of the ship Rick had seen, a
+destroyer escort. Willing hands lifted him from the water. He slumped
+down on the edge of the stage, shaking his head to clear it while Navy
+frogmen stripped his aqualung harness from him and pulled the mask from
+his face.</p>
+
+<p>A voice said, "Drink this."</p>
+
+<p>A mug of steaming black coffee was thrust into his hand and he sipped,
+grateful for the spreading warmth it brought.</p>
+
+<p>Suddenly he started again. "Scotty! Where is he?"</p>
+
+<p>"Up here, Rick, with me."</p>
+
+<p>He looked up, and his eyes focused again&mdash;on Tony and Zircon!</p>
+
+<p>A motor whaleboat drew up to the landing stage, and two husky frogmen
+handed up a suited figure. "Here's one, Lieutenant," a frogman called.</p>
+
+<p>"All right, Danny. Where's the other?"</p>
+
+<p>"Heading for the reef at top speed. Jonesy's after him."</p>
+
+<p>"Go help Jonesy haul him in."</p>
+
+<p>"Yes, Sir." The motor whaleboat veered off and sped toward shore.</p>
+
+<p>A frogman surfaced almost at Rick's feet. He instinctively drew back,
+and the frogman gripped the edge of the stage, spat out his mouthpiece,
+and pulled up his mask with the other hand.</p>
+
+<p>Rick found himself looking at Steve Ames! What was he doing here?</p>
+
+<p>"Where's the brass ball?" Steve asked.</p>
+
+<p>"I don't know."</p>
+
+<p>With an effort Rick pulled his scattered wits together. His mind began
+to work again. Obviously, through some miracle Steve and Zircon had
+arrived on a Navy ship with Jimmy Kelly and a detachment of Navy
+frogmen.</p>
+
+<p>Scotty called from on deck. "It's at the octopus cave, Steve. I saw one
+of the frogmen drop it there."</p>
+
+<p>Steve hauled himself out to the landing stage. He grinned at Rick.
+"Feeling better?"</p>
+
+<p>"Much," Rick said. He was beginning to feel nearly human again.</p>
+
+<p>"Let's go on deck. I want to find out about this octopus cave."</p>
+
+<p>Rick stood up, and was surprised to find that he didn't wobble. He
+followed Steve up the ladder to the deck and found Scotty seated on a
+canvas stool, sipping coffee.</p>
+
+<p>Zircon asked anxiously, "Are you all right, Rick?"</p>
+
+<p>Tony said, "Here's the doctor for a look at you."</p>
+
+<p>A young Navy officer joined them and motioned Rick to a canvas stool. He
+applied a stethoscope and listened, then grunted his satisfaction. "He
+seems all right. Pulse a little fast, but that's to be expected. You had
+a slight dose of oxygen starvation. Feel better now?"</p>
+
+<p>Rick nodded. He was beginning to feel wonderful. They were out of it,
+and with whole skins.</p>
+
+<p>Scotty grinned sheepishly. "I abandoned you. I had to, because I ran
+completely out of air. I shoved my man away and headed for the surface.
+I felt pretty guilty about leaving you with two of them."</p>
+
+<p>Rick returned the grin. "I felt the same way. I thought I'd abandoned
+you. But I see you got to the surface first."</p>
+
+<p>Steve accepted a cup of coffee and squatted on the deck, facing them.
+"Suppose we start from the beginning. What happened?"</p>
+
+<p>Rick told him, starting from the moment when they had heard the brass
+ball wail. He finished, "There were three of them. Did you get them
+all?"</p>
+
+<p>"Yes. Including one with a spear through his leg. The last one is just
+being hauled aboard now. He tried to get to the island."</p>
+
+<p>Jimmy Kelly and a group of frogmen joined them. Jimmy asked, "How about
+the sounding gear, Steve?"</p>
+
+<p>"We'll ask now. How about that octopus cave? Where is it?"</p>
+
+<p>"We'll take you," Rick said. "Let us get tanks from our boat. There
+should be a pair fully charged by now."</p>
+
+<p>Steve shot a look at the doctor. The officer shrugged, then nodded.
+"Okay, if it's a short dive. They've had plenty for today."</p>
+
+<p>"Chief? Where are you?" Kelly called.</p>
+
+<p>A frogman stepped from the rear of the group. "Here, Sir."</p>
+
+<p>"Check their regulators, please. If they're okay, hook up fresh tanks.
+If not, loan them complete outfits."</p>
+
+<p>"Yes, Sir."</p>
+
+<p>"Thanks, Chief. Then get set to come with us. Danny, Jonesy, Mike, and
+Dick come along, too. Bring still and motion-picture cameras. When we
+get down, split into two-man teams and search the area. You know what
+we're looking for. It's just like the one we found off St. Croix."</p>
+
+<p>Rick stared at the frogman officer. Another brass ball off St. Croix?
+But there wasn't time for questions.</p>
+
+<p>"Quick dive, please," Zircon requested. "These boys have had enough."</p>
+
+<p>"They're through as soon as they show us the cave," Steve agreed. "Come
+on, gang. Let's get to it."</p>
+
+<p>Rick carefully checked his equipment, something that no diver can ever
+take for granted or leave to someone else, while Scotty did the same.
+Then they put the equipment on and adjusted face masks. Their knives,
+Rick's camera, and Scotty's spear and gun were somewhere near the wreck.
+They would have to get them another time.</p>
+
+<p>The group entered the water. Rick looked around and oriented himself by
+the position of the <i>Water Witch</i>, then led the way with Scotty, Steve,
+and Jimmy swimming along with him while the Navy frogmen stayed closed
+behind.</p>
+
+<p>It was a thrill for Rick to be swimming with the famous UDT frogmen. He
+looked to the side and saw that Steve was perfectly at home in the
+water, and he marveled at the adaptability of the JANIG agent. Steve
+hadn't been joking when he said he would be an expert by nightfall.</p>
+
+<p>At the reef Rick turned northward and led the way toward the level of
+the cave. A few moments later he hooted for attention and with pointed
+finger showed it to Steve and Jimmy. The octopus was still there.</p>
+
+<p>A frogman swam over and picked the little creature up. The octopus
+spurted away, leaving a blob of ink behind. He came to rest above the
+cave, poised for further flight.</p>
+
+<p>Rick swam down to the sandy floor of the cave and began to search for
+the brass ball. Scotty beckoned, and they swam together toward the spot
+where Scotty had last seen it. The frogmen swam to the bottom with them,
+then fanned out, searching.</p>
+
+<p>A few moments later someone hooted, and a tanned, muscled frogman swam
+over, holding the object triumphantly.</p>
+
+<p>Steve Ames pointed to the surface and Jimmy hooted an order. The group
+swam leisurely up through the murky layer, oriented themselves by the
+sleek shape of the destroyer escort hull, and emerged at the landing.
+The frogman who had found the ball handed it up to Hobart Zircon.</p>
+
+<p>Steve Ames motioned to one of the frogmen. "Run these fellows over to
+the beach, please, then wait and bring them back." He turned to the
+boys. "Put on dry clothes. Then come on back. We need to talk."</p>
+
+<p>An hour later the boys, the scientists, Steve, and Kelly were seated at
+a table in the destroyer escort's tiny wardroom, noses twitching over
+the savory steaks that were being served. The boys ate like starved men,
+talking a steady stream between bites.</p>
+
+<p>Rick sighed and let out his belt. "Well, that's our story. What's
+yours?"</p>
+
+<p>Steve stirred his coffee thoughtfully. "I can make it short. We don't
+know the whole story yet, but we will by the time I get back to St.
+Thomas. Have you two any idea what these brass-ball gadgets are?"</p>
+
+<p>"We decided that they were probably sonar equipment of some type,"
+Scotty said. "But we couldn't figure out what they were for."</p>
+
+<p>"Easy," Steve said. "Although you couldn't know, of course. They were
+for spotting submarines."</p>
+
+<p>Rick stared. Submarines?</p>
+
+<p>Steve saw his look of bewilderment. "It happens that our new
+atomic-powered submarines are conducting manuevers in this area. Does
+that help?"</p>
+
+<p>It did! Light slowly dawned. "Then these were scanning our subs! But I
+still don't see why it would be any problem to find them. The subs must
+have equipment that will tell when sonar beams hit them."</p>
+
+<p>"They do. And that's a big part of the story."</p>
+
+<p>Steve sipped his coffee for a moment. "These sonar devices are a new
+type, and very cleverly designed. They don't send out a continuous beam.
+Instead, they operate in bursts, in a random pattern. They might send
+out a beam twice in a minute, or wait an hour between bursts. The beam
+is a powerful one. It's effective for an extraordinary distance."</p>
+
+<p>"The wail, of course, was the beam operating," Zircon interjected. "You
+didn't hear the beam itself, since that's ultrasonic. But you did hear
+the mechanical vibration of the brass ball. It had a kind of
+sub-harmonic effect that was audible."</p>
+
+<p>"That's right," Steve agreed. "Anyway, there were several different
+stations, in different locations. Some were on islands, some on fishing
+boats. Since they operated only in short bursts in a random pattern, the
+subs&mdash;and the special teams we sent out&mdash;were never able to get a
+bearing that meant much."</p>
+
+<p>"They must be self-recording," Rick said thoughtfully, "otherwise the
+enemy couldn't get the information out of them."</p>
+
+<p>"They are. Whatever echo they get makes a tracing inside the box they're
+mounted on."</p>
+
+<p>Scotty objected, "But what kind of information is it? How can anyone
+tell anything about the subs from such recordings?"</p>
+
+<p>"By putting all the recordings together and running a rather complex
+analysis. The analysis will give speed, depth of operation,
+maneuverability&mdash;if the spies are lucky to have beams operating at the
+right time&mdash;and number of torpedoes fired, with the same information on
+the torps. That's enough information to make it worth an enemy's while."</p>
+
+<p>"I'll say!" Scotty turned to Zircon. "And what were you doing,
+Professor?"</p>
+
+<p>"I'm afraid I arrived on the scene too late to do much good," Zircon
+boomed. "However, I believe we can be useful in preventing such
+occurrences in the future. I have an idea for an improvement in our
+scanners that will allow a fix to be made on such beams."</p>
+
+<p>There was a pause when dessert arrived. The boys savored excellent apple
+pie smothered in a generous helping of ship-made ice cream.</p>
+
+<p>"We thought Zircon might help us work out a system of getting fixes on
+the transmitters," Steve said. "As it happened, we got a lucky break.
+The subs happened to have their devices pointed at St. Croix
+simultaneously when a beam scanned them. They got a fix on it. We flew a
+team of frogmen down in a Navy amphibian right in the middle of the
+second storm. They found it, and got the men who were handling it. One
+of them talked."</p>
+
+<p>Jimmy Kelly picked up the story, "You arrived with Zircon at about the
+same time the St. Croix team took off from our base, and headed right
+into the storm. They didn't get back until late last night, and it was
+nearly dawn before we got the story from the man who talked. Then we
+loaded on this DE and headed here."</p>
+
+<p>"I'm glad you didn't wait ten minutes longer," Rick said fervently.
+"They foxed us. I kept listening for their boat, but they didn't use
+it."</p>
+
+<p>"They probably decided to swim out and sneak up on you," Zircon stated.
+"After capturing Tony last night, their suspicions were probably aroused
+somewhat. Even if they swallowed his story entirely, it would be only
+good sense to check up."</p>
+
+<p>Tony looked hurt. "I'm sorry you don't think my story was enough to
+allay their suspicions entirely. But speaking of listening for their
+boat, why didn't you hear this ship coming? And why didn't the fancy
+frogmen?"</p>
+
+<p>Rick thought that one over. "We wouldn't have heard the ship until it
+was very close because of the noise our bubbles make. But we should have
+heard it about the time it left the reef opening near our cottage. I
+don't know why we didn't."</p>
+
+<p>"And I don't know why we didn't see it," Scotty added. "It's big enough
+to be spotted at horizon distance."</p>
+
+<p>Jimmy grinned. "We pulled a fast one. We had enough steerageway to drift
+over your position after a few turns of the screws down by the reef
+passage. You see, we didn't know what was going on, so we took no
+chances. Then, when we got into position, we got into the water without
+waiting to anchor. We dropped anchor right after we got both of you out,
+but you probably didn't notice."</p>
+
+<p>"I couldn't have cared less, at that point," Rick said, and Scotty
+echoed the sentiment.</p>
+
+<p>"The reason why you didn't see us coming is that we came from the other
+side of the island. It's safer for a ship that draws as much water as
+this one. Tony spotted us as we approached the southern point."</p>
+
+<p>Steve grinned. "Anyway, it's a good idea to move in on an objective as
+quickly, silently, and invisibly as possible."</p>
+
+<p>"Have you captured the rest of the stations yet?" Rick asked.</p>
+
+<p>"No. But we have teams out, and they know where to go and what to look
+for, thanks to the man who talked last night."</p>
+
+<p>"Who are these people?" Scotty demanded.</p>
+
+<p>Steve scratched his chin. "Well," he said finally, "you might put it
+this way: they're people who have no business knowing what they're
+trying to find out."</p>
+
+<p>Rick hid a grin. He knew perfectly well they would get no more
+information out of Steve. The essence of security is to give information
+only to people who have a need to know it. The Spindrifters had no
+reason for knowing the identity of the enemy, apart from their own
+curiosity. One thing was certain, though, it was another nation that
+wanted the information.</p>
+
+<p>"You're probably tired of answering questions," Rick said, "but I've got
+one more. How did you happen to arrive right in the nick of time?"</p>
+
+<p>"Nothing very mysterious about it," Jimmy Kelly answered. "We steamed up
+to the island and sent a boat ashore, with Professor Zircon. Dr. Briotti
+had seen us approach, and he met the boat. He told us you were diving.
+Zircon had assumed as much since we could see your boat anchored on the
+reef."</p>
+
+<p>"I told them about last night," Tony added.</p>
+
+<p>"Yes, and we sent a party of men to the house up the beach to capture
+these fancy frogmen of yours. The house was empty. Since their boat was
+tied up, we made a quick assumption that they were out on the reef with
+you. We did a fast run out ..."</p>
+
+<p>"And got the fright of our lives," Steve finished. "We knew there were
+three of the enemy and two of you down below, and we could see only
+three sets of bubbles. We thought you were done for."</p>
+
+<p>"It was remarkable the way Lieutenant Kelly and his men got ready to
+dive," Zircon said. "I've never seen people move so fast. Steve, too.
+Then, just as they were about to go over the side, we saw two more
+bubble trails and knew at least that you were still alive. But in a
+moment the entire pack of bubbles merged."</p>
+
+<p>"We hit the water," Jimmy Kelly said, "and were about to dive when one
+of the enemy skyrocketed up. He was blue in the face and scared witless.
+We hauled him out and then started to dive again. And along came Scotty,
+half dead and babbling about you. I started straight down to get you,
+but you met me halfway." He grinned. "You weren't in very good shape,
+either, for a few minutes."</p>
+
+<p>"How about the men? Where are they?" Scotty asked.</p>
+
+<p>"Down below. Locked up, with an armed guard at the door."</p>
+
+<p>Steve Ames finished his coffee and sat back with a sigh of satisfaction.
+"I'm happy," he announced.</p>
+
+<p>The boys grinned. He looked it.</p>
+
+<p>"Glad you wound this up so fast," Zircon boomed. "When will you return
+to Charlotte Amalie?"</p>
+
+<p>Steve looked at Jimmy Kelly. "You in a hurry?"</p>
+
+<p>"Not particularly. Now that this case is over we go back to some pretty
+dull routine. Why?"</p>
+
+<p>"Oh, I thought your boys might like a little recreation."</p>
+
+<p>Jimmy looked suspicious. "Any sailor likes recreation. The more the
+better. The UDTs enjoy it more than most. What's on your mind?"</p>
+
+<p>Steve's wave took in the four Spindrifters. "It wasn't their fault one
+of the gang talked his head off last night. If he hadn't, their work
+here would have given us a lead we couldn't have gotten in any other
+way. Suppose we repay 'em."</p>
+
+<p>Jimmy sighed. "Get to the point."</p>
+
+<p>"Keep the ship here tomorrow. Turn your boys loose to help find the
+treasure they're after. You've got equipment they need. Besides, I'm
+sure your gang can find some nice souvenirs if they put their minds to
+it. Old cutlasses, cannon, cannon balls&mdash;things like that."</p>
+
+<p>"It's a deal." The UDT lieutenant chuckled. "I'll try a little souvenir
+hunting myself. Of course, since it's unofficial, I'll have to ask for
+volunteers."</p>
+
+<p>"Think you'll get many?" Rick asked anxiously.</p>
+
+<p>Steve and Jimmy laughed. The lieutenant said with a chuckle, "If one of
+them doesn't volunteer I'll turn him over to the doctor, because I'll
+know he's sick. The UDT's volunteer because they like to swim. It isn't
+often they get a chance like this, to dive just for fun."</p>
+
+<p>"If we don't find the treasure," Scotty said with satisfaction, "it'll
+be because it isn't there!"</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="CHAPTER_XX" id="CHAPTER_XX"></a>CHAPTER XX</h2>
+
+<h3>The Buried Secret</h3>
+
+
+<p>At first, the captured frogmen were defiant. They insisted that the Navy
+had nothing on them. The brass ball wasn't theirs. They were only sport
+divers having some fun.</p>
+
+<p>Then, faced with the unassailable fact that Rick had taken motion
+pictures of their activities, they lapsed into sullen silence and
+refused to talk.</p>
+
+<p>Rick and Scotty watched Jimmy Kelly check the diving equipment of the
+frogman teams lined up on the destroyer escort's deck. Beyond the teams
+they could see the three enemy frogmen, taking the air under the
+watchful eye of a shotgun-armed sailor.</p>
+
+<p>"I wonder if we'll ever get the full story," Rick mused.</p>
+
+<p>"We've got all we need," Scotty answered. "What pieces are missing?"</p>
+
+<p>"Well, I'm curious about the chicken. I think we hit it when we decided
+they wanted to scare us out of the octopus-cave area, but it would be
+nice to know for sure. And why did they take the sonar equipment to the
+eastern reef during the storm?"</p>
+
+<p>"Probably to make a recording as a routine check. They couldn't assume
+all sub activity was taking place to the west."</p>
+
+<p>"But how can we be sure?"</p>
+
+<p>"We can't. We can only try to figure out what happened, based on what
+information we have. For instance, there must have been a sonar unit
+near where we swam at St. Thomas. It's the only thing that could have
+got the shadow so excited. But what difference does it really make? We
+know most of the story, and we can guess the rest."</p>
+
+<p>"Steve may be able to fill in some pieces later," Rick observed. He
+liked to have a thing wrapped up neatly, with no loose ends hanging.
+Still, that was almost impossible in a case like this.</p>
+
+<p>Jimmy Kelly called, "You boys ready to go?"</p>
+
+<p>"Whenever you are," Rick called back. He picked up his heavy three-tank
+block from where it rested against the rail and handed it to Scotty.
+While his friend held the rig, Rick got into it. Then he performed the
+same service for Scotty. The tanks were heavy.</p>
+
+<p>Tony and Zircon, similarly equipped, came out of the amidships cabin
+with Steve Ames. Jimmy had loaned equipment from the frogmen's supplies,
+to enable the group to work around the wreck longer.</p>
+
+<p>The search party assembled on the landing stage. Jimmy had split his
+teams into two groups. They would dive in relays.</p>
+
+<p>"We'll look the situation over, then get to work," Jimmy instructed.
+"How many have wrecking bars?"</p>
+
+<p>Four of the UDT gang held them up.</p>
+
+<p>"All right. Turn and turn about. Work for ten minutes then pass them to
+your mates. Watch your hoses, especially when working inside. Okay.
+Let's go."</p>
+
+<p>They slipped into the water four at a time, Rick and Scotty in the first
+four. Once in the water, the weight of the heavy tanks vanished. The
+boys had removed weights from their belts to allow for the extra tanks
+and for more than ten additional pounds of air on the descent.</p>
+
+<p>A pair of frogmen payed out a heavy rope, taking the reel down with them
+in order to provide a direct link from wreck to ship. On the way up the
+divers would pause at knots in the rope to decompress, allowing time for
+compressed nitrogen to get out of their blood streams.</p>
+
+<p>With the boys and the scientists, Jimmy went over all visible portions
+of the wreck. He summed up his attitude with an elaborate shrug and
+spreading of his hands that said he didn't know where to begin. For his
+frogmen, he made a sweeping gesture that told them to tackle the wreck
+anywhere. The frogmen moved in, operating in pairs. The water clouded
+rapidly with silt, particles of marine growth, and fish eggs.</p>
+
+<p>The top of the captain's cabin came off. Rick swam in through the murk
+and picked up the chair that had seemed to be in good condition. He
+carried it to clear water and placed it on the sand. Now that it was out
+in the open, it could be seen that teredos&mdash;shipworms&mdash;had feasted on it
+and burrowed into it until it was nothing but a chair-shaped shell.</p>
+
+<p>The same was true of the cabin interior. It collapsed soundlessly under
+the prying bars of the frogmen. Under their enthusiastic attack the
+water was soon so roiled that visibility at the wreck was reduced to
+almost zero. Jimmy sounded the signal for ascent and the group surfaced
+without decompressing. They had just about exhausted a single tank.</p>
+
+<p>On the landing stage, the lieutenant said, "No use continuing until the
+water settles. Any ideas, Chief?"</p>
+
+<p>Sanders, the group's chief petty officer, replied, "I think we're going
+to need a sand hose, Sir. Most of the wreck is buried."</p>
+
+<p>Jonesy, a short, husky frogman with a bright-red crew cut, added, "Sir,
+I think the cannon and stuff would be on the deck ahead of the cabin we
+opened up, but the deck is under the sand. Could we rig a hose, Sir?"</p>
+
+<p>"Good idea. Put a detail to work, Chief."</p>
+
+<p>Sanders called out four names and issued instructions. Jimmy called a
+ten-minute break for the rest.</p>
+
+<p>During the break, Rick sought out Steve Ames. He commented, "You know,
+this wasn't a very well-organized gang. I keep thinking about the two
+who tried to get us at St. Thomas."</p>
+
+<p>Steve disagreed. "You're wrong. It was a <i>very</i> well-organized gang.
+Their trouble was not enough trained agents. They had to hire extras,
+and the extras were just ordinary mugs, and not very bright ones. It was
+the mugs who made the mistakes, not the real agents."</p>
+
+<p>Jimmy Kelly spoke up. "Did we tell you? We got reports from the other
+UDT teams this morning. Our people have all the stations except one in
+British territory. Maybe our British cousins can get the station team
+for us. We've tipped them off."</p>
+
+<p>The lieutenant finished a glass of orange juice and rose. "Time's up.
+Let's get back to the wreck."</p>
+
+<p>Hobart Zircon asked, "Don't you want to take your camera, Rick?"</p>
+
+<p>"Good idea." He hurried to get it. One of the frogmen had picked it up,
+along with the rest of the equipment they had left behind.</p>
+
+<p>The water had settled enough for thorough inspection of the entire aft
+portion of the wreck. Rick and Scotty helped the frogmen poke into every
+possible place without finding more than a pair of rusted cutlasses.</p>
+
+<p>Rick surveyed the scene with discouragement. The statue was somewhere
+under the sand, which probably meant they would never find it. He had
+another sudden realization, too. They had no proof that this ship was
+the <i>Maiden Hand</i>, no proof that the whole business wasn't just a
+wild-goose chase.</p>
+
+<p>By the time the dive was over, the sand hose had been rigged. The first
+group surfaced and Jimmy ordered the fresh group of frogmen to hose out
+the aft cabins to find anything that might be left. Then the group was
+to start work on the probable location of the foredeck.</p>
+
+<p>During the rest period, Rick told Jimmy about the other wreck they had
+found, the modern ship that he guessed was a war casualty.</p>
+
+<p>"We'll take a look at it first thing in the morning before we shove off
+for St. Thomas," Jimmy promised. "You never know what you'll find in a
+wreck. We've found a lot of things worth salvaging."</p>
+
+<p>The boys were operating under Navy rules now. They put on fresh tanks
+and got their instructions from Chief Sanders. "Longer decompression
+this time. Stick with me on the way up and move when I move. We don't
+want you to get the bends."</p>
+
+<p>The boys nodded their understanding, then took to the water.</p>
+
+<p>The frogmen below were still hosing sand. Water forced at high pressure
+through the hose that ran down from the ship sent the stuff swirling in
+great clouds. The boys watched. They couldn't do much looking around
+until the water settled.</p>
+
+<p>Then they saw that the frogmen weren't waiting. They swam into the murk,
+feeling around with their hands. Rick saw one emerge triumphantly
+holding a round object that could only have been a cannon ball.</p>
+
+<p>He and Scotty plunged in, too. Working with the frogmen they rapidly
+assembled a treasure trove of cannon, more cannon balls, cutlasses still
+in good condition, and useless ship's gear.</p>
+
+<p>Fifteen minutes later a frantic hooting brought them in a rush to where
+Jonesy was holding something. Zircon and Tony got there at the same
+time, and soon all work had ceased while Jonesy's find was examined.</p>
+
+<p>Tony took his belt knife and scraped. Then he looked around at the
+watching group and nodded. He clasped his hands together and shook them
+like a fighter mitting the crowd.</p>
+
+<p>Rick and Scotty hooted their triumph. Jonesy had found the statue of St.
+Francis!</p>
+
+<p>The boys, the scientists, Steve, and Jimmy carried the treasure to the
+surface. The rest of the frogmen continued hunting for souvenirs.</p>
+
+<p>On the landing stage they put the statue down with loving care. Even
+under the marine growth they could make out the cowled figure of the
+sainted monk, head bent over the fawn he held in his arms.</p>
+
+<p>Tony went to work. Soon there was a gleam of gold that brought a yell of
+triumph from the boys. Then&mdash;amazingly&mdash;the gleam of dull silver.</p>
+
+<p>"Hobart, look at this!" Tony exclaimed.</p>
+
+<p>The big scientist knelt and examined the silvery streak. He borrowed
+Tony's knife and probed, then his laugh boomed across the water.</p>
+
+<p>"We are the victims of our own research!" he roared. "All this
+trouble&mdash;over a statue of lead!"</p>
+
+<p>"Lead!" Rick stared incredulously. This couldn't be true! "There's gold,
+too," he pointed out.</p>
+
+<p>"Apparently gold leaf over a lead base," Tony said with a sigh. "No,
+Rick. Hobart is right. This is lead."</p>
+
+<p>A call from the water made them look up. Chief Sanders and his diving
+buddy had surfaced, and they were carrying a statue of St. Francis!</p>
+
+<p>Behind them, another pair of frogmen, with still another statue!</p>
+
+<p>Within a half hour there were no less than eight identical statues lined
+up on deck. St. Francis, in lead, repeated eight times.</p>
+
+<p>Scotty scratched his head. "Well," he said finally, "we certainly found
+St. Francis! In fact, we overdid it a little."</p>
+
+<p>Not until long afterward did they learn the answer. Tony Briotti, a
+scientist of great persistence, did some research in England during a
+European trip to attend a conference of archaeologists. He found that
+the <i>Maiden Hand</i> had carried several dozen St. Francis statues, for
+sale to churches and individuals in the New World. Captain Campion had
+considered only one special enough to mention, because it had been
+blessed by the Cardinal of France and entrusted to his care for delivery
+to the Governor of Barbados.</p>
+
+<p>The Spindrifters took one statue as a gift for Barby. A cutlass was
+Rick's share of the loot, while Tony took the bar shot they had found
+near the wreck and Zircon selected a cannon ball. It was understood that
+the knife Scotty had found was to be his, so that he could present it to
+Hartson Brant.</p>
+
+<p>A few quick dives the following morning disclosed nothing of interest
+around the first wreck they had found, but Jimmy identified it as a
+common type of small cargo vessel. Then the destroyer escort sailed for
+St. Thomas.</p>
+
+<p>Before it left, there was time for a few words with Steve Ames.</p>
+
+<p>"I'm leaving St. Thomas by air tonight for Washington," he reported.
+"Something new has come up and I'm needed. I may need you, too, before
+this case is over. The report wasn't detailed, but it carried a few
+implications that have me worried."</p>
+
+<p>"We'll be ready if you need us," Rick assured him.</p>
+
+<p>Steve's warm smile flashed. "I know," he said. "I'll see you soon."</p>
+
+
+
+<hr style="width: 65%;" />
+<h2><a name="The_RICK_BRANT_SCIENCE-ADVENTURE_Stories" id="The_RICK_BRANT_SCIENCE-ADVENTURE_Stories"></a><i>The</i> RICK BRANT SCIENCE-ADVENTURE <i>Stories</i></h2>
+
+<h3>BY JOHN BLAINE</h3>
+
+<h3>SCIENCE-ADVENTURE STORIES</h3>
+
+<div class="figcenter">
+<a name="ad" id="ad"></a>
+<img src="images/ad.jpg" alt=""/>
+</div>
+
+<p>Rick Brant is the boy who with his pal Scotty lives on an island called
+Spindrift and takes part in so many thrilling adventures and baffling
+mysteries involving science and electronics. You can share every one of
+these adventures in the pages of Rick's books. They are available at
+your book store in handsome, low-priced editions.</p>
+
+<p><span class="smcap">The Rocket's Shadow</span></p>
+
+<p><span class="smcap">The Lost City</span></p>
+
+<p><span class="smcap">Sea Gold</span></p>
+
+<p><span class="smcap">100 Fathoms Under</span></p>
+
+<p><span class="smcap">The Whispering Box Mystery</span></p>
+
+<p><span class="smcap">The Phantom Shark</span></p>
+
+<p><span class="smcap">Smugglers' Reef</span></p>
+
+<p><span class="smcap">The Caves of Fear</span></p>
+
+<p><span class="smcap">Stairway To Danger</span></p>
+
+<p><span class="smcap">The Golden Skull</span></p>
+
+<p><span class="smcap">The Wailing Octopus</span></p>
+
+<p><span class="smcap">The Electronic Mind Reader</span></p>
+
+<p><span class="smcap">The Scarlet Lake Mystery</span></p>
+
+<p><span class="smcap">The Pirates of Shan</span></p>
+
+<p><span class="smcap">The Blue Ghost Mystery</span></p>
+
+<p><span class="smcap">The Egyptian Cat Mystery</span></p>
+
+<p><span class="smcap">The Flaming Mountain</span></p>
+
+
+
+
+
+
+
+
+<pre>
+
+
+
+
+
+End of Project Gutenberg's The Wailing Octopus, by Harold Leland Goodwin
+
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+</pre>
+
+</body>
+</html>
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+The Project Gutenberg EBook of The Wailing Octopus, by Harold Leland Goodwin
+
+This eBook is for the use of anyone anywhere at no cost and with
+almost no restrictions whatsoever. You may copy it, give it away or
+re-use it under the terms of the Project Gutenberg License included
+with this eBook or online at www.gutenberg.org
+
+
+Title: The Wailing Octopus
+
+Author: Harold Leland Goodwin
+
+Release Date: March 3, 2010 [EBook #31495]
+
+Language: English
+
+Character set encoding: ASCII
+
+*** START OF THIS PROJECT GUTENBERG EBOOK THE WAILING OCTOPUS ***
+
+
+
+
+Produced by Greg Weeks, Mary Meehan and the Online
+Distributed Proofreading Team at https://www.pgdp.net
+
+
+
+
+
+
+
+
+
+ THE WAILING OCTOPUS
+
+ A RICK BRANT SCIENCE-ADVENTURE STORY
+
+ BY JOHN BLAINE
+
+
+1956
+BY GROSSET & DUNLAP, INC.
+NEW YORK, N. Y.
+
+ALL RIGHTS RESERVED
+
+_Printed in the United States of America_
+
+[Transcriber Note: Extensive research was unable to find a U.S. copyright
+renewal.]
+
+
+[Illustration: _With his spear Scotty jerked off the enemy frogman's
+face plate_]
+
+
+
+
+Contents
+
+
+I DESTINATION: CLIPPER CAY
+
+II THE SCUBA SLIP
+
+III THE SHADOW
+
+IV VISITORS BY NIGHT
+
+V THE WARNING
+
+VI THE DEADLY TANK
+
+VII THE DERELICT
+
+VIII THE FANCY FROGMEN
+
+IX WRECK OF THE "MAIDEN HAND"
+
+X THE WAILING OCTOPUS
+
+XI LIGHTS ON CLIPPER REEF
+
+XII CLOUDS OVER CLIPPER CAY
+
+XIII MESSAGE IN THE STORM
+
+XIV BELOW THE DARK CORAL
+
+XV HOW SINGS THE GAY SARDINE?
+
+XVI THE DEADLY SPRING GUN
+
+XVII TRAPPED IN TWENTY FATHOMS
+
+XVIII THE FIGHT ON THE "MAIDEN HAND"
+
+XIX JANIG TAKES TO THE WATER
+
+XX THE BURIED SECRET
+
+
+
+
+List of Illustrations
+
+_With his spear Scotty jerked off the enemy frogman's face plate_
+
+_Pretending to lose his balance, Rick fell squarely against the man_
+
+_The valve assembly, traveling with bullet speed, barely missed Scotty's
+head_
+
+_Rick turned in time to see a six-foot shark speed past_
+
+_A third man lowered something that glistened like gold_
+
+_Rick nudged Scotty to back away_
+
+
+
+
+[Illustration: Spindrift Island]
+
+
+
+
+THE WAILING OCTOPUS
+
+
+
+
+CHAPTER I
+
+Destination: Clipper Cay
+
+
+The Sky Wagon droned through Caribbean skies, following a compass course
+that led to Charlotte Amalie, capital city of the Virgin Islands. With
+eager interest, the four people in the small plane watched the blue
+water below. In a few moments they should pass over the island that was
+their ultimate destination.
+
+Rick Brant, in the pilot's seat, turned to the husky, black-haired boy
+next to him. "See anything yet?" he asked.
+
+Don Scott had been surveying the far horizon through binoculars. He took
+them from his eyes and shook his head. "Nothing but water. You sure
+there is an island called Clipper Cay?"
+
+Rick let the plane fly itself for a moment while he stretched
+luxuriously. He was a lean, long-legged boy with brown hair and eyes and
+a bone-deep tan. He grinned at his friend. "No faith. That's the trouble
+with you."
+
+"No logic, that's the trouble with you," Scotty countered. "If there
+were such an island it would be called an island, not a cay. A cay is
+something that follows an O, as in okay."
+
+The two scientists in the rear seat had been listening with amusement to
+the boys. Since the start of the expedition Scotty had professed doubt
+and misgiving, more for the sake of conversation than anything else,
+Rick was sure.
+
+Dr. Anthony Briotti, archaeologist of the Spindrift staff, leaned
+forward. "At least pronounce it correctly, Scotty. 'Cay' is pronounced
+'key.'"
+
+"See?" Scotty exclaimed triumphantly. "The only place where they have
+islands called keys is in Florida. We're on a wild-goose chase, I tell
+you!"
+
+Big Hobart Zircon, a nuclear physicist and long-time friend of the boys,
+tapped Scotty on the shoulder. "Since you're so certain of that, may I
+ask why you came?"
+
+Scotty tried to look martyred. "Only because of the buddy system," he
+said solemnly. "The first rule of underwater safety--or above-water
+safety, for that matter--is that you have to swim with a buddy. You and
+Tony swim together, so I had to go along as a buddy for Rick. Somebody
+has to chase the mermaids away from him, and it might as well be me."
+
+"That's nice of you," Rick said soberly. "There'll probably be a whole
+horde of mermaids guarding the treasure, not to mention half a dozen sea
+monsters."
+
+Tony Briotti said, "There's one mermaid I wish were with us, and that's
+Barby. After all, she started this whole thing. Too bad she has to miss
+out."
+
+Rick's pretty sister, Barbara Brant, had unwittingly launched the flight
+to the Virgin Islands by getting into an argument with Tony Briotti
+about the authenticity of the legend that pirates had once used
+Spindrift Island as a hangout. Tony had challenged the legend. After
+that, of course, proof had to be found.
+
+Rick had recalled digging up the remains of a campfire in Pirate's Field
+during the installation of equipment for the moon rocket, the first
+great experiment that had put the Spindrift Island scientific group in
+business as a research foundation headed by Rick's father, Hartson
+Brant. It was during this experiment that Scotty had joined the staff
+after rescuing Rick from an unscrupulous gang. The two boys had been on
+a number of expeditions together since that time and were fast friends.
+Zircon was one of the original Spindrift group. Youthful Tony Briotti
+was one of the new staff members, but he had already earned the loyalty
+and friendship of the boys by his fine leadership of the expedition to
+the Philippines, as related in _The Golden Skull_.
+
+Starting with the campfire site, Barby and the boys had excavated
+Pirate's Field under Tony's direction. They had unearthed positive
+evidence that pirates had landed there. The most vital evidence was the
+remains of a logbook, once the log of the bark _Maiden Hand_, sunk by
+the woman pirate Anne Bonney off the island of Clipper Cay in the Virgin
+Islands.
+
+Scotty turned and looked at the two scientists. "I'm just kidding, of
+course. You couldn't have kept me from coming without tossing me into
+irons. But seriously, do you expect to find treasure, Tony?"
+
+The archaeologist grinned. "Depends on what you mean by treasure. As I
+recall, one definition is 'something rare or precious.' Well, a chance
+to go skin diving in the Virgin Islands is certainly that--a rare and
+precious opportunity. At least I think so."
+
+Hobart Zircon grunted, "And so do I."
+
+"Amen," Rick echoed.
+
+"You're evading the issue," Scotty accused. "You know perfectly well
+what I mean. Do you expect to find that golden statue mentioned in the
+logbook?"
+
+"Expect? On a treasure hunt, one hopes; one doesn't expect," Zircon
+stated in his booming voice.
+
+Rick smiled to himself. Probably no Spindrift expedition ever had
+started with such a flimsy excuse. According to the log of the _Maiden
+Hand_, the ship had gone down before the pirates could locate a golden
+statue of St. Francis, hidden by the bark's captain, Thomas Campion.
+According to Captain Campion, the statue had weighed "an
+hundred-weight." Certainly a hundred pounds of gold was worth going
+after, but there were a few considerations that made finding it rather
+unlikely.
+
+In Captain Campion's words: "_That we did prevent the boucaniers from
+fynding the blessede statue was moste fortunate, yette the bark did go
+to her deathe in twentye fathomes, and so the statue is loste._"
+
+Rick and Scotty had become underwater enthusiasts on their return from
+the Philippines, and both had aqualung equipment that would take them to
+twenty fathoms without difficulty. However, working time at that depth
+was sharply limited by the capacity of their tanks. This was assuming
+that they were able to find the wreck of the _Maiden Hand_ in the first
+place.
+
+Still, there was enough of a chance to provide an excuse for a vacation
+expedition. The real purpose, so far as Rick was concerned, was to get
+in some superb swimming in clear water. He also intended getting plenty
+of underwater movies of the colorful reefs and fish. Scotty planned to
+do some underwater hunting.
+
+Tony Briotti's interest grew out of his profession. The Virgin Islands
+had been pretty well worked over by archaeologists, and most of the
+early Indian middens and mounds explored. But on the west coast,
+archaeologists equipped with aqualungs had recently found primitive
+artifacts a half mile offshore, and Tony wanted to do a little
+underwater artifact hunting of his own.
+
+Hobart Zircon was the only one without a specific objective. He had
+readily agreed to go along simply because he wanted a vacation. He had
+said, "Tell you what, I'll go along and do some surface fishing. Rick
+and Scotty can catch fish underwater and put them on my hook, then
+signal me to pull up. If the fish aren't heavy enough to ruin my rest,
+I'll haul them in."
+
+Mr. and Mrs. Brant had already made plans to take a vacation in Canada,
+and Barby was registered at a summer girl's camp. Weiss, Winston,
+Gordon, and Shannon, the other staff scientists, were away on various
+projects. So the four "treasure hunters" had welcomed an excuse to go
+off on a venture of their own.
+
+They would have a wonderful time, Rick thought, and who knew? They might
+even find the treasure!
+
+Scotty had been looking through the binoculars again. He gave Rick a
+grin. "I take it all back," he said. "There's an island ahead."
+
+The scientists leaned forward eagerly, and Rick strained to see. Sure
+enough, in a few moments they began to make out the island on the
+horizon ahead. Rick had enough confidence in his navigation to be
+certain that it was Clipper Cay.
+
+The group had spent the night in Puerto Rico, then departed early in
+order to fly off the direct route for an advance look at Clipper Cay.
+Rick didn't intend to land. He would circle the island once or twice,
+then head again for Charlotte Amalie on the island of St. Thomas.
+
+Scotty asked, "Where does the word 'cay' come from, anyway?"
+
+Tony Briotti answered. "It's from the Spanish, Scotty. It means island,
+or islet. However, the Spanish got it from the Taino people, who were
+the Indians of the Antilles."
+
+The island was close enough now so that they could discern its shape.
+Rick saw that it formed a rough crescent, running from north to south.
+It was about a mile long, perhaps a half mile wide at its greatest
+width, tapering to the horns of the crescent. He saw also that the color
+of the water changed gradually from the fathomless blue of the ocean to
+the green of shallow water.
+
+Inwardly excited, he put the nose of the plane down and let the small
+craft pick up speed. Scotty grinned his pleasure, and Rick knew that his
+pal was just as excited in spite of his joking skepticism.
+
+Rick leveled off at an altitude of four thousand feet and put the plane
+in a wide circle. Zircon leaned over Tony to look out the window, and
+Rick had to compensate in a hurry because the big scientist's weight
+threw the plane out of trim. Then Scotty, just as eager, leaned over to
+Rick's side and the trim had to be corrected again.
+
+The island was a travel agent's wildest dream. The blue water gradually
+shifted to green, then lighter green, and finally the white of lovely
+beaches on both sides of the island. Lines of surf marked the position
+of reefs off both shores.
+
+Somewhere along the western reef was the wreck of the _Maiden Hand_.
+Rick wondered if they would have diver's luck and locate the ancient
+bark, and at the same moment he was sure they would.
+
+"Plenty of vegetation," Briotti remarked.
+
+"Probably palms, perhaps some mangrove," Zircon agreed. "Take us down
+for a closer look, Rick."
+
+Rick obliged by standing the Sky Wagon up on a wing and sliding down as
+quickly as safe flying allowed. He, too, wanted a closer look. He cast a
+glance at his gas gauge. There was enough fuel, with a margin of safety,
+unless he got too enthusiastic about lingering around the island.
+
+He leveled off again at a thousand feet and flew up the east coast,
+between the outer reef and the beach. This was the Atlantic side of the
+island, and the surf on the reef was heavy.
+
+"Cottages," Scotty called. "Look!"
+
+They counted seven on the eastern side of the island, most of them near
+the middle. It was hard to see details among the palms, but they seemed
+small and unpainted, like fishermen's shacks. Rick reversed course and
+flew down the western side and they counted five more. One fairly
+pretentious beach house was near the northern tip of the island. In
+general, the houses on the western side seemed better kept, and slightly
+larger. A few houses had small docks. Off the southern tip of the
+island, on the western side, a boat was trolling. The occupants waved as
+Rick flew over.
+
+"Wonder which house is ours?" Scotty asked.
+
+They didn't know, of course. Arrangements for a beach house had been
+made for them by a friend of Zircon's, and not until they landed at
+Charlotte Amalie would they get the details. The same friend, Dr. Paul
+Ernst, had also arranged for a boat, to be used as a diving tender.
+
+Rick was tempted to land in the smooth water off the western shore. The
+Sky Wagon had been equipped with pontoons for that very purpose. They
+had realized that no landing place would be available on the cay for a
+wheeled aircraft. But there was little to be gained by landing now when
+they didn't even know which house would be theirs.
+
+Besides, there were supplies and equipment to be picked up and charts to
+be obtained, and the Sky Wagon needed to have the tank topped off, since
+they couldn't very well carry aviation gas to the island.
+
+Reluctantly, Rick asked, "Anyone want to see anything else?"
+
+"Not me," Hobart Zircon said flatly. "I want to get to Charlotte Amalie
+so we can get started back. That water looks clear enough to drink."
+
+"See any sign of wrecks on the bottom?" Tony inquired.
+
+No one had. No one had looked. They were too interested in getting an
+over-all view of Clipper Cay.
+
+Rick set his course for St. Thomas. Now that he thought about it, he was
+rather pleased with himself. The flight from Spindrift was the longest
+single trip he had ever taken in the Sky Wagon. The party had stopped
+for fuel as needed and had stayed overnight as darkness overtook them
+along the way. He had hit every destination on the nose, on time. And
+now the end of the trip was in sight without a single incident to mar
+its smoothness.
+
+In a short time the mountains of St. Thomas rose out of the sea, and
+soon afterward Rick circled high above the colorful roofs of Charlotte
+Amalie. He switched on his radio and asked for seaplane landing
+instructions. The airfield directed him to the proper landing place, a
+beach and pier at the edge of the city. Then Scotty took over the mike
+and, while Rick started in for a landing, asked the airfield tower to
+phone Dr. Paul Ernst, Zircon's friend, and notify him of their arrival.
+
+Apparently the tower operator phoned immediately, because as Rick taxied
+toward the dock, Zircon saw his friend waiting. Following the
+instructions of a dockman, Rick beached the Sky Wagon and cut the
+engine. Two husky Virgin Islanders hauled the ship higher onto the
+beach, and the Spindrifters climbed out.
+
+Dr. Ernst was a small, bespectacled man with a shock of unruly white
+hair. He looked like a country doctor--which was reasonable enough, Rick
+thought, because that's just about what he was. Charlotte Amalie, with a
+population of about 11,500, could not be described as a big city.
+
+The doctor greeted them all cordially, then immediately got down to
+business. "I'm sorry you are not remaining in Charlotte Amalie. However,
+Hobart, I have done as you requested. For tonight I have reservations
+for you at one of our oldest hotels, Alexander's Rest. Named for
+Alexander Hamilton, of course."
+
+Rick remembered that the Revolutionary hero had been brought up in the
+Virgin Islands.
+
+"The beach cottage is waiting at Clipper Cay. It is on the western side,
+the third from the southern tip of the island. You shall have my own
+boat. I think you will find it ideal for a diving tender. I call it the
+_Water Witch_. An attractive name, is it not? I have checked on your
+equipment. It is held at the warehouse in my name. The supplies you
+wished to buy here have been ordered and are waiting at Andersen's
+Supply House. I have told them you will be calling."
+
+The group listened, delighted at the obvious efficiency with which Dr.
+Ernst had taken care of Zircon's requests.
+
+By lunchtime they had picked up their equipment and supplies, Scotty had
+tested the twin diesel engines on the _Water Witch_ and announced
+himself more than pleased, Rick had checked over the aqualungs and
+compressor that had come down with his camera and other equipment by
+freight, the supplies had been stowed, the Sky Wagon refueled, and
+nothing remained but to check in at the hotel. This, they had decided,
+could wait until after lunch.
+
+While the scientists drove off in Dr. Ernst's car to pick up the doctor
+at his office, Rick and Scotty walked into town, headed for "The Danish
+Pastry" where the group was to meet for lunch.
+
+Rick spoke his amazement. "Look at us," he marveled. "Ready to go. No
+trouble, no strain, no pain. Ever see an expedition get off to such a
+smooth start? We can't lose, Scotty. After a beginning like this we
+couldn't help finding the treasure."
+
+Scotty grinned his agreement. "I didn't ask," he said, "but I wouldn't
+be surprised if the good Dr. Ernst hasn't done some advance diving and
+marked the statue's location with a buoy hung around its neck, just to
+make things easier for us!"
+
+"Twenty fathoms," Rick said reflectively. "That's a lot of water.
+Besides, we don't know how accurate Captain Campion's guess was. We may
+be getting into water that's too deep for us."
+
+Which, though unknowing, was one of the most prophetic remarks he had
+ever made.
+
+
+
+
+CHAPTER II
+
+The Scuba Slip
+
+
+Charlotte Amalie had color. It was an old community, dating back to
+Danish ownership of the Virgin Islands, and there was a feeling of
+antiquity underneath the color of the tropics. There was no sharp lines
+to buildings; everything had a pleasant weathered look.
+
+"Friendly folks," Scotty observed, after the tenth passer-by had bidden
+them a good day. "Doesn't seem to matter whether they're rich or poor.
+They look happy, and they're certainly polite."
+
+"I like it," Rick agreed. "Those colored roofs get me." He stumbled on a
+cobblestone and added, "But the street could stand improving. Cobbles
+are fine for horses, maybe, but they're hard on cars."
+
+"What do they do here for a living?" Scotty asked. "Wish we had Chahda
+along. He could reel off the straight dope from his _Worrold
+Alm-in-ack_." Their Indian friend, Chahda, was at home in Bombay and
+they hadn't heard from him in some time. His ability to quote from _The
+World Almanac_, which he had memorized, had caused the boys considerable
+amusement, even while they appreciated having a kind of walking
+encyclopedia with them.
+
+They passed a fruit stand where women were shopping for mangoes,
+soursops, and other delicious-looking things, including sugar cane.
+"That's part of it," Rick said. "Sugar. This is also the headquarters
+for bay rum."
+
+Scotty's eyebrows went up. "_Bay_ rum?" He stepped out of the way to let
+an ancient woman on a donkey go by. "What's the bay part of it?"
+
+Rick shrugged. "Search me. Anyway, you don't drink it, you put it on
+your face. I guess it was originally distilled from bayberry trees or
+something. Anyway--" He stopped suddenly as Scotty's fingers sank into
+his arm.
+
+"Look!" Scotty exclaimed.
+
+Rick looked, and let out a yell. "Steve! Steve Ames!" In the next moment
+he could have bitten his tongue out, because it was entirely possible
+that Steve wasn't traveling under his own identity.
+
+Ames was an athletic-looking young man in a white suit and Panama hat.
+He stopped at Rick's hail, turned, and waited for the boys to catch up.
+His face split in a pleased grin.
+
+Rick breathed his relief. Evidently Steve didn't mind being called by
+name.
+
+The boys knew Steve as Spindrift's contact with JANIG, the Joint
+Army-Navy Intelligence Group for which Spindrift had worked in the past,
+once to solve _The Whispering Box Mystery_, and again to track down the
+secret of _The Caves of Fear_.
+
+"Wonder what he's doing here?" Scotty muttered.
+
+"We'll soon find out," Rick said.
+
+Steve greeted them cordially. "What brings you two wanderers to these
+shores?"
+
+"We were about to ask the same of you," Rick returned.
+
+Steve grinned at the obvious curiosity in the boys' faces. "Nothing very
+exciting. I'm here on a little vacation. Swimming."
+
+"What kind of swimming?" Scotty wanted to know.
+
+"Oh, skin diving, mostly."
+
+"Gosh, that's wonderful!" Rick exclaimed. "Scuba or snorkel?"
+
+There was the barest of hesitations before Steve replied. "Snorkel.
+There's nothing that's more fun than snorkeling around the reefs. That's
+the only way to swim in waters like these. You can get right down among
+the fish."
+
+Rick saw Scotty's mouth open to point out Steve's error, but he stepped
+on his friend's foot and said quickly, "We're here for the swimming,
+too. Maybe we can join forces."
+
+He knew the answer would be no. Steve wasn't vacationing; he was on a
+case. A vacationing skin diver would know that a snorkel is nothing but
+a tube that allows a swimmer to float face down on the surface of the
+water while looking for something to dive after. Once the dive starts,
+the snorkel has no purpose, since its short length only allows it to
+project a few inches above the surface while a diver is floating face
+down. On the other hand, the Scuba--Self-Contained Underwater Breathing
+Apparatus, like the boys' aqualungs, really does allow the diver to get
+down among the fish.
+
+"Thanks for the invitation," Steve said. He smiled. "I don't usually try
+a cover story unless I have it down cold. Just for my future guidance,
+where did I slip? Your faces were quite a study."
+
+Rick told him. Steve nodded. "Thanks. I just got here on the morning
+plane, and I haven't been briefed yet. By tonight I'll be an expert on
+skin diving."
+
+The statement only whetted further Rick's over-sharp curiosity. If Steve
+was to be briefed on skin diving, it sounded like a case that would
+interest him and Scotty.
+
+Steve continued to smile. "I don't want to linger too long. Want to give
+me a hand?"
+
+Rick refrained from shouting and merely nodded his head. Scotty, with
+only slightly less restraint, said, "You know we do."
+
+"Fine. Don't look. In the doorway of the tailor shop is a
+dark-complexioned man in a gray sharkskin suit. He's a tail. He picked
+me up at the airport. I don't know the town well enough to lose him
+easily in broad daylight. Never been here before today. Take him out for
+me?"
+
+Rick and Scotty nodded. Neither looked toward the doorway. "How will we
+get in touch with you?" Rick asked.
+
+Steve hesitated. "There's no one I'd rather see more of, and no one I'd
+rather have on my side. But this case is not for you. Just do me this
+favor, then forget you saw me."
+
+"You never know when you'll need help," Rick pointed out. "We won't horn
+in, but it won't do any harm to know how we can reach other. Tonight
+we'll be at a hotel called Alexander's Rest. Tomorrow we take off for an
+island called Clipper Cay."
+
+"All right. If you really need to reach me, call the duty officer at the
+UDT base and leave a message. I'll get it."
+
+Rick turned slightly. In a plate-glass window across the street he could
+see a reflection of the tailor shop Steve had mentioned, and he could
+make out the form of a man in the shadowed doorway. He estimated that
+the shop was about fifty feet away.
+
+Scotty was also measuring the situation. He said, "Walk away from us so
+the tail will have to come by."
+
+Steve nodded. He shook hands, gave them each a grin, and was gone.
+
+Rick said loudly, "Give me your shoulder to lean on. I've got a rock in
+my shoe."
+
+Scotty obliged, and Rick half turned as he did so. He saw the man in the
+gray sharkskin suit saunter out of the doorway and start toward them.
+
+Rick balanced on one leg, one hand on Scotty's shoulder, the other hand
+fumbling with the shoelace on his lifted foot.
+
+The tail walked toward them, unfolding a paper as he did so. He was
+apparently devoting his full attention to the paper; his actions said he
+didn't even know the boys existed.
+
+"You ought to get tighter shoes," Scotty observed. "Then you wouldn't
+get stones in them."
+
+"Save the advice," Rick grunted. "I've got a knot in the lace."
+
+The man came abreast of them, between Rick and the building, and in that
+moment, clawing wildly for balance, Rick lost his hold on Scotty's
+shoulder. He fell squarely against the man in the gray suit and crushed
+him into the building.
+
+[Illustration: _Pretending to lose his balance, Rick fell squarely
+against the man_]
+
+"Hey!" the man yelled. "What's the idea?"
+
+Scotty rushed to the rescue, took the fallen shadow by the shoulders,
+and tried to pull him to his feet. This only made matters worse, since
+Rick was stretched across his legs.
+
+"I'm so sorry," Scotty said. "Gosh, I'm sorry. He slipped. Here. Let me
+help you up."
+
+"Get off me," the man yelled.
+
+Rick tried, lost his balance again, and fell against the man's chest,
+pinning him to the sidewalk.
+
+Scotty groaned. "Rick! You clumsy ox. Get off the man!"
+
+"I'm trying to," Rick said plaintively. "My shoe came off. Here. Help me
+up."
+
+"Help yourself!" Scotty returned sharply. "I'm trying to help this
+gentleman."
+
+Rick rolled clear and Scotty got the man to his feet. He was something
+less than spotlessly clean, thanks to the dust of the road, and there
+was a rip in the arm of his coat.
+
+"Look at that!" Scotty exclaimed. He made ineffectual efforts to dust
+the man off. "Rick, you ripped his coat."
+
+Rick looked embarrassed. "I'm terribly sorry. Here, sir. Let me take you
+to this tailor shop. We can have it repaired in a jiffy."
+
+"Forget it!" the man snapped. "And get out of my way. I'm in a hurry."
+
+"It was all my fault, and I refuse to take no for an answer," Rick said
+firmly. He took the man by the arm. "Come on. It will only take a
+moment. You can't walk around town like that. I insist on having your
+suit repaired. I'm sure that the tailor can mend it so no one would ever
+notice."
+
+"No," the man grated. "Please stand aside." Both boys had managed to
+block the sidewalk.
+
+"Please," Rick pleaded. "This is terribly upsetting. We really should
+have the damage to your suit repaired."
+
+The man's dark complexion was turning a grayish pink with rage. Rick
+estimated quickly. If he knew Steve Ames, the JANIG agent was long gone,
+and the tail would not catch up with him again. They had delayed the
+shadow for perhaps two minutes, but for Steve that would be enough.
+
+Rick stepped aside. "Very well. If you insist--"
+
+"I do." The man brushed by and hurried off.
+
+The boys looked at each other and grinned.
+
+"He won't catch Steve," Rick said.
+
+"Not a chance. Well, my clumsy friend, shall we put your shoe back on
+and go meet the others for lunch?"
+
+"We shall," Rick returned. "Indeed we shall." He slipped his shoe on and
+tied it quickly. "Wasn't it interesting, where Steve said we could reach
+him?"
+
+Steve had said at the UDT base. That meant simply at the home of the
+Navy frogmen--the Underwater Demolition Teams. No wonder Steve had said
+he would be an expert on skin diving by nightfall. He was going to be
+with the most expert experts of all.
+
+Rick sighed. "Just our luck he doesn't want us in the case. Wouldn't it
+be great to work with the Navy frogmen? We could learn plenty."
+
+"Forgetting St. Francis?" Scotty inquired. "There he lies, twenty
+fathoms down, probably covered with barnacles and waiting to be rescued.
+And you want to go fogging off with the frogmen."
+
+"All right, all right! Don't rub it in. We'll go back to being
+interested in the bark _Maiden Hand_. And St. Francis. And pirates.
+Let's cast off, my hearty."
+
+The Danish Pastry was only a few blocks away, and Dr. Ernst and the
+Spindrifters were already seated. The boys joined them, with apologies
+for being late, but without mentioning their meeting with Steve Ames.
+There was nothing to be gained by bringing the matter up in front of Dr.
+Ernst. They could tell Zircon and Tony later. Zircon knew Steve, but
+Tony didn't.
+
+Over dessert, Dr. Ernst reached into his bag and brought forth a chart.
+"I thought you might need this," he said.
+
+It was a detailed chart of Clipper Cay and the surrounding waters. It
+showed clearly the position of the reefs, and it gave soundings that
+showed the depths.
+
+Zircon shook his massive head. "Paul, your thoroughness has never failed
+to amaze me. What would we have done without you?"
+
+Ernst smiled his pleasure. "Thank you, Hobart. I try to be thorough.
+Besides, I want you all to have a pleasant recollection of the Virgin
+Islands. We who live here love them very much."
+
+The boys and Tony echoed Zircon's thanks, then fell to a study of the
+chart.
+
+It was apparent that the water deepened rapidly beyond the western reef.
+In a few places, the twenty-fathom line was only a short distance out.
+
+"Have you any idea where this ship went down?" Dr. Ernst asked.
+
+"A bare idea," Tony replied. "It was off the western shore of the
+island, probably close to the reef, in twenty fathoms. The bark had been
+hit and was sinking. The captain ran for the island with the hope of
+beaching the ship on the reef, but he never made it. The bark went down,
+and Anne Bonney's pirates picked up the survivors."
+
+"We know of Anne Bonney here," Dr. Ernst told them. "You realize that
+the Virgin Islands were once a hangout for pirates? Oh, we have a dark
+and bloody history, what with piracy, slave rebellions, even Indian
+massacres."
+
+"You'd never know it," Rick said. "This is the most peaceful place I've
+seen in years."
+
+He didn't add that the peace was only apparent. Steve Ames wasn't needed
+in really peaceful places. Something was stirring under the tropical
+calm of St. Thomas.
+
+"Tonight you must have a taste of St. Thomas home life," Dr. Ernst said.
+"You shall be my guests at dinner. Dr. Briotti will be interested in my
+collection of Indian pottery. And you young men will be interested in my
+wife's hobby, which is fish. She has an amazing collection."
+
+"Alive?" Scotty asked.
+
+"Yes, indeed. In salt-water aquariums. Our misfortune makes it easy. You
+see, we have no natural fresh-water supplies on St. Thomas. We depend on
+catching rain for our drinking water. So our plumbing is operated by sea
+water, of which we have plenty. As a result, Mrs. Ernst is able to have
+a constant supply of salt water flowing through her aquariums. I know
+you'll be interested."
+
+The boys agreed. Mrs. Ernst's hobby sounded like fun.
+
+After lunch Dr. Ernst departed for his office, leaving the Spindrift
+group to their own devices. Not much remained to be done, except for
+checking in at their hotel. For now, they were content to walk around
+town.
+
+As they passed the post office where Alexander Hamilton had once been a
+clerk, Scotty smiled meaningfully at Rick.
+
+"Steve lost a tail this morning. Remember?"
+
+Rick looked at him doubtfully. "Of course. Why?"
+
+"Somebody loses, somebody gains," Scotty replied cheerfully. "Don't look
+behind you, but we've found one!"
+
+
+
+
+CHAPTER III
+
+The Shadow
+
+
+The two scientists had been walking ahead of Rick and Scotty, but
+Zircon's keen ears had overheard the boys' remarks. However, he was too
+wise to make his interest obvious. He waited until the group passed a
+store with a large display, then stopped, as though to examine it.
+
+Rick found himself surveying a collection of tools for the
+do-it-yourself addict.
+
+"What's this about Steve and a tail?" Zircon asked. He pointed at a
+power-drill set, as though discussing it. His normally loud voice
+couldn't have been heard five feet away.
+
+Rick shook his head, then pointed at a different drill set. Anyone
+watching would have thought the tools were the subject of conversation.
+Rick quickly outlined what had happened and concluded, "Scotty spotted a
+tail on us a few minutes ago. Same guy?"
+
+Scotty bent down for a closer look at a series of wood power bits. His
+voice was scarcely audible. "Not the same one. This one is a Virgin
+Islander. Looks like a farmer. When we stopped he walked right on by.
+He's out of sight now. But he'll pick us up as soon as we start."
+
+Tony Briotti, to whom this kind of adventure was new, asked, "What do we
+do about it?"
+
+"Nothing," Zircon answered. "Steve Ames wanted to get rid of his shadow
+and the boys helped him out. But we have no particular reason for
+wanting to get rid of ours. Let him follow. Undoubtedly whoever is
+tailing Steve got interested when they saw him talking with the boys,
+but they'll learn nothing by trailing us."
+
+"And it's one less for Steve to contend with," Rick added.
+
+Scotty straightened up. "I have to admit this bunch of tools is
+beginning to bore me a little. Where are we going?"
+
+Zircon shrugged. "I have nothing in mind. We might check in at the
+hotel."
+
+"I'd rather swim," Rick said.
+
+"Same here." Scotty made a quick survey of the street without seeming to
+do so. "No sign of our friend. He's probably in another doorway."
+
+"Then Hobart and I might as well check in," Tony suggested. "I'd like a
+swim, but frankly I'm a little sleepy from too much lunch."
+
+"How about checking in for us?" Rick asked. "Then we could get right
+into the water. No need for all of us to go to the hotel."
+
+The scientists agreed, and at Scotty's suggestion hailed a taxi. As the
+car rolled off toward the boat where their luggage was stored, Scotty
+grinned. "This was the only taxi in sight. Wonder how our friend will
+manage to follow us?"
+
+He had his answer at the pier. While Zircon was piling their overnight
+bags into the taxi, a farmer rode past on a bicycle. He didn't look at
+them. "There he goes," Scotty said. "Pretty easy after all. Guess the
+town is small enough so he wasn't worried about finding us."
+
+"We'll give him a choice to make when Tony and I leave." Zircon smiled.
+"Let's see whether he stays with you, or follows us."
+
+Not until the boys had changed to swimming trunks in the cabin of the
+_Water Witch_ did they find the answer to Zircon's question. The shadow
+had decided to stay with them. This time it was Rick who spotted him.
+The shadow was nearly hidden beyond a curve in the shore line. To anyone
+not aware of being tailed, he would have appeared to be with any of the
+other casual figures that went unhurriedly about their business in the
+neighborhood. If Scotty hadn't pointed him out, Rick would not have
+suspected that the shadow had the slightest interest in the Spindrift
+party.
+
+"We going to rig the aqualungs?" Scotty asked.
+
+"Let's not bother. Masks, snorkels, and fins. We can swim out and take a
+look at some of the coral heads."
+
+"How about a gun?"
+
+Rick considered. "I guess not. We don't want to do any hunting. But you
+might take a hand spear in case something real inviting shows up. And
+let's take our knives." He had also decided against taking his camera. A
+leisurely, unencumbered swim was what he wanted. There would be time
+enough for hunting fish or taking pictures later, when they got to
+Clipper Cay.
+
+While Scotty went into the cabin to select a spear from their assortment
+of fishing gear, Rick surveyed the _Water Witch_ with satisfaction. It
+was a thirty-five-foot craft with a small cabin forward and a spacious
+cockpit aft. It had been used as a diving tender before, apparently,
+because there was a ladder that could be swung outboard for a diver to
+use. There was also a small boom that could be rigged quickly for
+lowering or lifting gear from the water.
+
+The gas tanks were ample for their purposes. One filling would be more
+than sufficient for a round trip to Clipper Cay plus any cruising they
+would do while at the island. The tanks were full.
+
+Water capacity, an important consideration on waterless Clipper Cay, was
+more than adequate. In addition to a built-in fifty-gallon tank in the
+cabin, there was a rack of five ten-gallon jerry cans in the cockpit.
+
+Scotty emerged from the cabin with a short, low-powered spring gun.
+"Thought I might as well bring a light gun," he said. "It's just as easy
+to carry as a spear."
+
+"Okay." Rick led the way down the pier to the beach, carrying his mask,
+snorkel, and slippers. These he placed carefully on one of the Sky
+Wagon's pontoons, in order to protect the clear glass of his mask from
+any possible scratching. Then, with a yell to Scotty to hurry, he
+bounded through the shallows, threw himself forward, and planed along
+the surface of the water. Lifting his head for a quick breath, he dove
+under, feeling the wonderful coolness of the water close over him. He
+judged its temperature quickly. It was close to eighty degrees, he
+estimated, and cool only by comparison with the warm air.
+
+He reversed course quickly and stood up. Scotty was also in the water.
+
+"I'm glad we didn't bother with suits," Rick said. "In water like this
+we'd even be too warm in midseason suits."
+
+Because of the coldness of the water off the New Jersey coast, the boys
+had equipped themselves with full, waterproof rubber suits under which
+long under-wear was worn, and with lighter "midseason" suits of foam
+neoprene. Because of the reported warmth of water in the Virgin Islands
+they hadn't added the suits to their already heavy load of supplies.
+
+They returned to the beach, picked up their equipment, and took it into
+the water. Rick sat down and rinsed out his flippers, then carefully
+removed the last traces of sand from his feet. He pulled the flippers
+on, adjusting them for maximum comfort. His face mask was next. He spat
+into it, then rubbed the saliva over the glass. This rather
+unsanitary-appearing trick was essential, since saliva is an excellent
+antifogging compound needed to help keep the glass clear underwater.
+Then he rinsed his mask lightly and adjusted the head straps, leaving
+the mask on his forehead.
+
+The snorkels used by the boys were plastic tubes curved at both ends. At
+one end was a mouthpiece; at the other was a cage that held a rubber
+ball. A dive or rough wave action floated the ball upward, closing the
+tube and preventing water entry. Rick and Scotty adjusted the rubber
+bands of their snorkels around their heads above the mask straps.
+
+Scotty was ready. He slipped his mask into place, molded the soft rubber
+skirt of the mask to the contours of his face, inhaled through his nose
+to make sure the seal was airtight, then called, "Let's go!" He gripped
+the mouthpiece of his snorkel between his teeth, the rubber flange under
+his lips, and slid into the water.
+
+Rick was right behind him. As his mask touched water he saw the white
+coral sand of the bottom a few inches down. The only sign of life was a
+hermit crab, perhaps a half inch in length, dragging his home of the
+moment--a tiny spiral shell.
+
+In one hand, Scotty carried the spear gun by its pistol grip. He swam in
+the position that suited him best, both arms hanging limply down. Rick,
+on the other hand, preferred to swim with arms relaxed along his sides,
+as long as his hands were empty. When carrying a spear gun or his
+camera, he also swam with arms hanging downward. Neither boy used his
+arms for swimming. The rhythmic, powerful leg strokes were enough,
+thanks to the swim fins.
+
+The water deepened rapidly but lost none of its clarity. Even at a depth
+of a dozen feet, Rick thought, he could have counted every grain of
+sand. This was unlike anything he had ever experienced. At home,
+visibility of five feet was considered good. Lost in the enjoyment of
+really clear water, he completely forgot about the shadow.
+
+Scotty reminded him. He touched Rick's arm and signaled a stop. The boys
+removed their snorkel mouthpieces and faced each other upright in the
+water, holding position with easy flipper movements.
+
+"Just pretend we're talking," Scotty said. "Don't look around. I'm
+trying to spot our friend over your shoulder." After a moment he shook
+his head. "No sign. Wonder if he ran for a bathing suit?"
+
+"Forget him. Let's swim. See any coral heads?"
+
+"Darker water off yonder. Let's look."
+
+They readjusted their snorkels and headed in the direction Scotty had
+indicated.
+
+Rick breathed easily through his tube, constantly scanning the bottom.
+Now and then he saw various kinds of debris on the bottom, including
+abandoned beer cans and a section of newspaper that had not yet rotted
+away. Rubbish like this was to be expected in a harbor, he supposed,
+still it was as unattractive to a swimmer as junk along the roadside is
+to the motorist.
+
+Suddenly he noticed a fish--the first he had seen. He took a deep breath
+and dove by letting his head drop and then lifting his legs to a nearly
+vertical position. He slid underwater without a splash. When his fins
+were below the surface he started his leg motion again, and the flippers
+propelled him smoothly downward.
+
+The fish was perhaps a foot long, silvery, with a pointed nose and
+yellow fins. Rick couldn't identify it. The fish was busily rooting in
+the sand for morsels of food and paid no attention to the diver until
+Rick reached out and almost touched it, then it sped just beyond reach
+and commenced rooting again.
+
+His curiosity satisfied for the moment, Rick surfaced and rejoined
+Scotty. As he took position at his friend's side, the other boy hooted
+once, their signal for "attention." The hooting was done by making a
+kind of "hooty" groan into the snorkel mouthpiece, about the only sound
+that could be made without letting water pass the lips. Because water
+conducted sound so well, the hoot could be heard clearly some distance
+away.
+
+Rick lifted his face from the water and saw that Scotty was pointing to
+an area a short distance to their right. He followed Scotty's lead and
+saw the reason for the signal. It was a rocky, coral-covered area about
+thirty feet square and perhaps fifteen feet below the surface.
+
+The boys swam directly over it, then floated motionless, watching the
+activity below. At first glance, there appeared to be only a pair of
+odd-shaped file-fish nibbling at the formation, but as their vision
+adjusted they made out literally dozens of tiny, colorful fish in
+clefts, under overhangs, or waiting motionless against a patch of color
+on the rocks. Rick pointed to a school of about ten vivid little fish of
+electric-blue color. The largest was less than two inches long. Scotty
+hooted for attention and pointed in his turn to a section of the rock
+that held over a dozen sea urchins that looked like black horse
+chestnuts with exaggerated spines.
+
+Rick watched a pair of brown doctorfish about eight inches long swim by
+below, then his attention was attracted by a brilliant red squirrelfish
+peering out of a cleft. He pointed the red fish out to Scotty, who in
+turn showed him where a little moray was peering out of a hole near the
+base of the rock.
+
+Rick was fascinated. If a tiny patch of rock held this amount of life,
+what must the real reefs be like off Clipper Cay? He was suddenly
+impatient to get going, to put on his aqualung and explore the reef from
+top to bottom. And if they should really find the wreck of the _Maiden
+Hand_, there was every chance that the exploration of the wreck and the
+sea life it had acquired would more than compensate for the treasure
+none of them really hoped to find anyway. What a vacation!
+
+He was suddenly conscious of a throb in his ears. He listened and tried
+to identify it. A motorboat of some kind, but it didn't sound like a
+very powerful one. He lifted his head and searched for it.
+
+Scotty, too, had heard the boat. He began to tread water, lifting his
+mask, then rinsing it because it had fogged a little.
+
+Rick spotted the boat. It looked like a large row-boat, powered with an
+outboard motor, and it was headed in their direction.
+
+Scotty took his snorkel out of his mouth. "Better stay topside and
+watch. We don't want to start our vacation by getting run over."
+
+"Too true," Rick said. "Isn't this great? I've never seen so many kinds
+of small fish in one place in my life. Wait until we get out to the
+reefs where the big ones are."
+
+Scotty patted his spear gun. "I'll keep us supplied with fresh sea food.
+Wonder if there are any lobsters around?"
+
+But Rick had stopped listening. "Scotty, that guy is heading right for
+us!"
+
+The boat was getting close, and through his face plate Rick could make
+out the figure of a single occupant.
+
+Scotty suddenly gripped his arm. "Rick! It's our shadow!"
+
+Rick started. "Are you sure?"
+
+"Yes. I don't like this. What would he come out here for? Get ready to
+dive." Scotty pulled his mask into place and molded it to his face, then
+gripped his snorkel between his teeth.
+
+Rick followed suit and leveled off in the water in diving position, but
+he hesitated, waiting to see what the boat would do.
+
+It didn't take long to find out. The boat stayed on a perfectly straight
+course, headed directly for them. Rick waited. Perhaps the shadow
+intended to sheer off when he got close. He might have come out to talk
+with them.
+
+Scotty hooted four times, their signal for danger! Then he went under.
+Still Rick hesitated, until it was clear that the boat did not intend to
+swerve. He saw the shadow's face, set in grim lines, then his legs went
+up and he slid under, using his hands as well as his legs to pull
+himself down to safety. He thought incredulously, "He tried to run us
+down!"
+
+A dozen feet under he turned over on his back and saw the bright circle
+of the propeller and its trail of foam. The boat was past. He shot to
+the surface and filled his lungs with air, waiting for the next move.
+
+The boat spun around in a tight turn and headed back.
+
+Scotty surfaced next to Rick, pulled the snorkel from his mouth, and
+gritted, "Swim away. Let him use you for a target. I'm going to get that
+son of a spiny sea walrus."
+
+Rick saw from the position of the spear in Scotty's gun that his friend
+had charged the weapon during the dive. He nodded, then turned and swam
+away, flippers flailing as though trying to hurry. He watched over his
+shoulder and saw the boat head for him.
+
+He was breathing hard from the excitement now, but he took a deep breath
+and got ready to dive. But still he swam, leading the rapidly overtaking
+boat until it was almost on him. Only then did he shoot downward,
+twisting as he went. He looked back in time to see Scotty sight the
+spear gun and fire as the boat went past.
+
+At first Rick thought his pal had missed, then he realized what Scotty
+had done. The spear shaft was attached to a long wire leader, and the
+leader to a safety line coiled around a spool just ahead of the pistol
+grip. Scotty had deliberately fired ahead of the propeller, knowing that
+the wire leader would be caught and would wrap around the shaft.
+
+Rick saw the spear stop short as the wire caught, saw it hauled back
+against the propeller and drop free as the prop blades cut it loose.
+Scotty shot up for a breath, then dove instantly, toward the rapidly
+falling spear.
+
+Rick had to breathe himself. He surfaced, caught a quick breath, then
+went under again. Scotty was picking up the spear. Rick saw him place it
+in the gun barrel, swing the loader over the razor-sharp harpoon head,
+and shove down on the spring. In a moment the gun was loaded again.
+Luckily the spear had not bent when the prop blade hit it.
+
+The boat had come to a halt, the engine dead. The propeller could no
+longer turn against the wrapping of wire and heavy fishline. Scotty
+hooted twice, their signal to surface, and Rick followed him up. Near
+the surface they separated, Rick taking the side of the boat away from
+his friend. He longed for a weapon, even a hand spear. But he was
+helpless. Scotty would have to get in the first blow with the gun. But,
+Rick thought, that might give him time to get over the gunwale to
+grapple with the shadow.
+
+His head broke water. He pulled the snorkel from his mouth and let it
+hang. As luck would have it, the shadow saw him first. He stood up, oar
+in hands, poised for a swing at Rick's head.
+
+Scotty's voice stopped the swing. "Don't do it or you'll get three feet
+of steel through you!"
+
+The man turned and faced the needle point of Scotty's spear. The oar
+dropped from his hands.
+
+Rick gulped his relief. Apparently the shadow had no weapon.
+
+"Jump overboard!" Scotty ordered.
+
+The man hesitated. Scotty thrust the spear gun forward. "Jump, I said!"
+
+The shadow did, and sank in a flurry of bubbles. When he rose to the
+surface again, the point of the spear was against his back. "Hang on to
+the boat with both hands," Scotty directed.
+
+Rick got to his side with a kick of the flippers and ran his hands over
+the man's clothing. He found a switch knife, which he put in his belt.
+"He's clean," he said. "No other weapons."
+
+"Take a look in the boat," Scotty suggested.
+
+Rick did so, lifting himself up on the gunwale. There was nothing in the
+boat but oars and a can of gasoline.
+
+"Want to tell us why you tried to run us down?" Rick asked.
+
+The shadow merely stared.
+
+"Talk," Scotty ordered, "or I'll put this spear through you."
+
+The man spoke, and his accent was the soft speech of the island. "No,
+you won't. I could explain running down swimmers by accident, but you
+could never explain putting a spear through a man in a boat. You don't
+want that kind of trouble."
+
+Scotty grinned at the truth of it. "Okay," he said. "Just one thing.
+Don't push us too far. Stay in the water until we're ashore, and don't
+try to overtake us."
+
+"Better heed that advice," Rick warned. "Come on, Scotty. Let's go." He
+put his snorkel in place.
+
+Scotty moved to his side. "Welcome to the hospitable waters of St.
+Thomas," he said. "What say we look up some friendly sharks before we go
+ashore?"
+
+
+
+
+CHAPTER IV
+
+Visitors by Night
+
+
+Rick and Scotty stood on the pier and watched their erstwhile shadow row
+slowly toward another pier some distance away.
+
+"We probably should have tied him up and called the police," Rick
+remarked.
+
+"It wouldn't have gotten us anything," Scotty disagreed. "He could
+always claim he didn't see us in the water. After all, it wouldn't be
+the first time divers had been run over by motorboats."
+
+"It's too late now, anyway. Let's dress, then go to the hotel and tell
+Zircon and Tony about this."
+
+As they dressed in the small cabin of the _Water Witch_, Rick spoke
+aloud the question that had been bothering him. "What did he have to
+gain by running us down? That's what puzzles me. It was a stupid thing
+to try, because he didn't really have much chance of getting both of us,
+or even one, once he failed to catch us by surprise."
+
+"He wasn't very well prepared for murder, either," Scotty added. "No
+weapons except a switch knife."
+
+Rick nodded agreement. "He was desperate," he concluded. "Suddenly he
+had to take a chance on getting us. He must have known it wasn't much of
+a chance. Either he lost his head, or he wasn't very bright. What could
+have made him try?"
+
+Scotty had no answer, nor could Rick even hazard a reasonable guess.
+
+They locked the cabin of the _Water Witch_, walked into town, and found
+a taxi. Their shadow did not show up again, and if a new tail had
+replaced him, the new one was too good to be spotted. However, the boys
+doubted that they were being followed.
+
+"I just don't get it," Rick said for the twentieth time. "Our friend
+must have lost his head. Otherwise he'd have waited on shore and
+continued to follow us when we came out of the water."
+
+"We'll probably never know," Scotty returned. "After all, we'll be gone
+in the morning."
+
+"I know. But meanwhile, we'd better have eyes in the back of our heads."
+
+The taxi discharged them in front of Alexander's Rest and they climbed
+out and surveyed the hotel with interest.
+
+Scotty spoke first. "Alexander's Rest? Which Alexander? The Great, or
+Hamilton? If it was Hamilton, as Dr. Ernst said, he must have built it
+personally."
+
+It was a two-story frame structure that had definitely seen better days.
+On closer inspection Rick decided that the second story had been added
+as an afterthought. It looked like the second layer of a poorly
+constructed cake.
+
+Inside, however, the hotel proved to be very comfortable. It was cool,
+and the rooms were large and clean. The boys learned that they had been
+registered in a twin bedroom on the second floor, while Zircon and
+Briotti were on the first floor.
+
+The boys found the scientists attired only in shorts, cooling off over
+long, cold drinks. They accepted glasses of iced ginger ale and told the
+scientists of their adventure.
+
+"It's amazing." Tony Briotti shook his head. "Do you realize that you
+two are a phenomenon? I should write you up for one of the scientific
+journals."
+
+"You mean because we turned the tables on the shadow?" Scotty asked.
+
+"No. Because you're adventure-prone. Did you ever hear of people who are
+accident-prone?"
+
+Zircon chuckled. "A good observation of these two. I agree absolutely,
+Tony. They are adventure-prone."
+
+Rick sighed. "All right. What's the joke?"
+
+"None. I'm quite serious." Tony found more ice for his glass. "Insurance
+statistics show that certain people are accident-prone. Accidents happen
+to them. They're going along minding their own business and bang! A
+streetcar jumps the tracks and hits them. Or they step into open
+manholes. They're the kind of people who always manage to be walking
+under things when workmen drop tools."
+
+"And you," Zircon concluded, "are adventure-prone in the same way.
+Consider this. Had you walked down the street either a minute earlier or
+later this morning you would not have seen Steve Ames. It's quite likely
+that you would never have known of his presence in town. But what
+happens? You walk right into an adventure. One thing leads to another,
+and suddenly a stranger is trying to run you down with a motorboat."
+
+"That's what bothers me," Rick replied. "There's no pattern. It just
+makes no sense."
+
+"It doesn't have to," Tony Briotti said with a grin. "The Golden Skull
+pattern makes no sense, either. But you got us into more excitement than
+I knew was possible. You're just adventure-prone."
+
+"And for the sake of my gray hair, stay out of trouble," Zircon pleaded.
+"Stay close to us until we get to Clipper Cay."
+
+"It will be a pleasure," Rick assured him. "Only let us out of your
+sight long enough to shower, please. I'm sticky."
+
+"We'll stay in the hotel," Scotty promised.
+
+"Fine. I'll feel better about it if I know where you are. Suppose you
+come by in an hour and we'll have a quiet dinner at the Ernsts'."
+
+Dinner was quiet but interesting. The Ernsts were excellent hosts, and
+both Dr. and Mrs. Ernst had many tales of the islands to tell. As the
+good doctor had promised, the boys enjoyed the wonderful variety of sea
+life Mrs. Ernst had collected to keep in salt-water tanks. She
+identified for them a number of the smaller reef fishes, including
+clowns, demoiselles, and even the deadly scorpion fish.
+
+The party broke up early, since the start for Clipper Cay was to be made
+at dawn by the scientists. The plan was for Zircon and Tony to make the
+trip in the _Water Witch_, with the boys flying over in the Sky Wagon.
+That way, both the plane and boat would be available. Zircon thought
+that fast trips to St. Thomas might be necessary to replenish supplies,
+and he added that he would be happier if the plane were available in
+case of accident. That way, the patient could be in Charlotte Amalie in
+a short time.
+
+As the boys bade good night to the scientists and started up the stairs
+to their room, Rick asked, "Any sign of a shadow tonight?"
+
+"Nope. Guess Steve's friends--or enemies--must have lost interest."
+
+"I hope that you're right. As long as Steve ordered us to stay out of
+the case, I'll be glad when we get to the cay and get underwater. We
+have to find that precious gadget even if it takes two solid weeks of
+diving. If we don't, Barby will never let us forget it."
+
+This last was uttered as Rick turned the key in the lock and pushed the
+door open. He flicked on the light, then gave a sudden gasp.
+
+The shadow and a stranger--in their room!
+
+The boys looked into the muzzles of .38-caliber pistols.
+
+"Come on in quietly," the stranger said. "Put your hands on the tops of
+your heads and sit down on the bed over there."
+
+The boys did so. They had no alternative. Rick's mind raced. Somehow
+they had to warn the scientists, and they had to get out from under the
+muzzles of the guns! What could these men want of them?
+
+The stranger sat down on the other bed. His pistol muzzle was centered
+precisely on Rick's belt buckle. "We want information. Give it to us
+without any trouble and we'll go away. Give us a hard time and you'll
+regret it."
+
+Rick studied the stranger. He was of medium height, dressed in tan
+slacks and sport shirt with a darker jacket. His face was ordinary. He
+might have been a store clerk, or streetcar conductor, or nearly
+anything. But Rick saw from the way his jacket fitted that he was
+powerfully built for his size, and his hands were lean and
+strong-looking. He had a heavy tan, as though he had spent many months
+in the sun.
+
+"What do you want to know?" Scotty asked.
+
+"Let's start with what you were saying when you walked in. Who is
+Barby?"
+
+"My sister," Rick said. "She's at home, in New Jersey."
+
+The stranger sighed. "I was afraid of this. Give us straight answers or
+you'll buy plenty of grief. Now, who is Barby? Who does he represent?"
+
+"He told you," Scotty answered. "She's his sister."
+
+The stranger tried a different tack. "How did you know where to swim
+today? Did Ames tell you?"
+
+"No," Rick replied. "We just swam straight out from the pier looking for
+coral heads."
+
+"Come on! You must have had some source of information. Who gave it to
+you?"
+
+"We didn't have any source of information," Scotty protested. "We just
+went for a swim!"
+
+The stranger lifted the pistol menacingly. "You'd better sing, and it
+better be straight. I'm warning you!"
+
+"Warn all you like," Rick said angrily. "What do you want us to say?"
+
+The shadow walked over and pulled back his fist.
+
+"Lay off!" the stranger growled. "You've pulled enough stupid stunts for
+one day. You'll be lucky if the boss doesn't rip the hide off you."
+
+The former tail subsided and glared at the boys.
+
+The stranger rose. "All right. If you won't talk here, we'll take you
+where you will talk. Get up."
+
+The boys looked at each other. Scotty raised his eyebrows. Rick grinned.
+He asked calmly, "Suppose we don't go?"
+
+"You'll go!" the stranger snapped.
+
+"I don't think we will," Scotty answered. "Look, mister. You're in a
+hotel. It's early, and there are people in the lobby. How far do you
+think you'd get if you tried to march us downstairs with a gun in your
+hand?"
+
+"We're not going through the lobby," the stranger told them. "We're
+going the way we came--through the window. And you'll go quietly or
+we'll take our chances. They might catch us, but you wouldn't care with
+a couple of slugs in you. Pete, go outside and wait. They'll come down
+one at a time. Keep them covered, and don't hesitate to shoot if they
+try anything."
+
+The shadow slipped through the window, hung by his hands, and dropped.
+
+The stranger's gun singled out Rick. "Get going."
+
+Rick shrugged. There was nothing else to do but obey--at least for the
+moment. He looked at Scotty, and his pal made a small gesture to the
+right. Rick's forehead wrinkled. This was no signal he recognized,
+unless Scotty meant to jump to the right.
+
+He swung a leg over the sill and looked down. The shadow was waiting,
+and the light from the window glinted dully off the gun in his hand.
+Rick went on out, then holding by his hands he gave a swing to the right
+and dropped. The gun covered him as he rose to his feet again.
+
+"Against the wall!" the shadow hissed.
+
+Rick dutifully moved back against the wall. The shadow was standing
+about six feet away.
+
+Overhead, Scotty was climbing through the window now. Rick watched
+carefully as his pal lowered himself to full length, and swung _to the
+left_.
+
+Instantly Rick divined Scotty's tactics. If the two boys were apart, the
+gun couldn't cover both of them at the same moment, and there would be
+an instant while the stranger jumped when only a single gun would be on
+them. And the shadow had already shown that he wasn't the smartest man
+in the world. Rick slipped to the right a step or two while the shadow
+was distracted by Scotty's jump. Scotty fell to his knees, and in
+getting up he managed to put a few more feet between himself and Rick.
+
+"Watch 'em!" The stranger's voice floated down. Rick glanced up and saw
+the stranger with one leg over the sill. He tensed.
+
+Scotty said, "Listen, you mug ..."
+
+The shadow's head turned toward Scotty, and Rick left the ground in a
+wild spring. He struck the shadow, hand clawing for the gun. He found a
+wrist, and twisted, falling backward as he did so. The shadow, the
+entire weight of his own body on his wrist from the throw, screamed!
+
+The gun landed on the ground. Rick let go and scrambled for it, but
+Scotty was there before him.
+
+In the instant of the struggle the stranger had hesitated on the window
+sill, hand grabbing for the pistol he had tucked in his belt. He pulled
+it free and aimed at the struggling figures below, but in the gloom
+there was no way to distinguish friend from foe. And in that heartbeat,
+Scotty picked up the shadow's gun and fired one snap shot.
+
+The stranger's gun dropped to the ground and he fell backward into the
+room.
+
+Scotty thrust the pistol into the shadow's stomach. "Face the wall," he
+ordered. "Put your hands against it. Now support your weight on your
+hands."
+
+The shadow did as ordered. Rick took the man's legs and pulled them
+backward so that the shadow's whole weight was against his hands, his
+outstretched body forming the hypotenuse of a right triangle. The only
+way he could move to regain his balance was to lower himself to the
+ground and then get up.
+
+Rick picked up the stranger's fallen pistol and hefted it. "Better see
+about the one upstairs," he advised. "I'll watch this one."
+
+"I fired at his hand, but I was high," Scotty told him. "He got it in
+the shoulder. He won't get far."
+
+Zircon and Briotti charged around the corner of the hotel in pajamas and
+slippers, followed by other guests and members of the hotel staff.
+
+"We had a little trouble," Rick explained briefly.
+
+The scientists took in the situation at a glance.
+
+"As I said," Tony Briotti muttered. "Adventure-prone. And lucky! How do
+you beat a combination like that?"
+
+
+
+
+CHAPTER V
+
+The Warning
+
+
+Steve Ames walked into the hotel dining room accompanied by a young Navy
+lieutenant. He spotted the boys immediately and waved.
+
+Rick breathed a sigh of relief. "There he is."
+
+"We can turn this whole business over to him and then get out of here,"
+Scotty returned.
+
+The events of the night before had culminated in two phone calls, one by
+the hotel manager to the police, the other by Rick to Steve Ames.
+However, the duty officer at the UDT base had replied that Ames was not
+available. Rick had then asked for intelligence, and his query had
+gotten fast results. Steve Ames didn't show up, but Navy Shore Patrol
+officers did. The SP's had conferred with the local police, and the
+affair had ended with the shadow and the stranger, whom Scotty had
+potted in the shoulder, being carried off by both groups. First,
+however, the senior Shore Patrol officer had listened to their story,
+then instructed the boys, "Wait for Steve Ames. Talk to no one else. The
+police won't ask any questions."
+
+After conferring, the Spindrift group decided to go ahead with their
+plans. The scientists were anxious to transfer their activities to
+Clipper Cay, not only to get on with their vacation, but to get the boys
+away from the mysterious danger that dogged their footsteps in Charlotte
+Amalie.
+
+The scientists had departed at dawn in the _Water Witch_, after
+extracting a promise from Rick and Scotty that they would not stir from
+the hotel until Steve Ames contacted them, and that they would then fly
+at once to Clipper Cay.
+
+The wait had been a long one. It was now nearly noon, and the boys,
+hungry because their breakfast had been at daybreak, were ordering
+lunch.
+
+Steve Ames sat down and motioned the lieutenant to a seat. "Jimmy, this
+is Rick Brant and Don Scott. Boys, Lieutenant Kelly. Have you ordered
+lunch?"
+
+"We were just looking over the menu," Rick replied.
+
+"Fine. We'll join you."
+
+The four consulted menus, then ordered. Steve turned to Kelly. "Jimmy,
+being the athletic type, you've probably never heard of the Spindrift
+Scientific Foundation."
+
+The lieutenant, a heavily tanned young man with crisp black hair, shook
+his head. "Sorry. I never have."
+
+"Well, it's a reputable, highly competent and conservative group of some
+of the best scientific brains in the country. But somehow, these two got
+attached to it. They're not very conservative, although they're
+competent--especially at getting into trouble."
+
+Kelly gave the boys a comradely grin. "If he talks that way, he must
+like you."
+
+The boys grinned back. The lieutenant was likable.
+
+"All right. Last I saw of you two, Rick was lying across the legs of the
+guy who had been tailing me. The next thing I heard, two men we've been
+keeping an eye on were in the hoosegow, one with a slug in his shoulder.
+And I also heard some wild tales of jumping out of windows. Now fill in
+the details."
+
+Rick started from the moment they first noticed that a shadow had picked
+them up. He told the story in careful and accurate detail, knowing that
+Steve's trained mind might find significance in things that meant
+nothing to him. Now and then Scotty elaborated on a point.
+
+When Rick concluded the recital, Steve cupped his chin in one hand and
+stared at them thoughtfully.
+
+Kelly complimented them. "Sounds as if you took care of things like real
+professionals, both in the water and in the hotel. And I must say, I
+wish my people would learn to give reports like that."
+
+The boys thanked him, and Scotty added, "I don't suppose you can tell us
+anything about what you do?"
+
+"Sure I can. I'm not one of Steve's hush-hush crew. I'm a simple Navy
+lieutenant."
+
+Rick chuckled. "In other words, you can't tell us."
+
+Steve said, "He's executive officer of the UDT group here. And he's
+group intelligence officer. I might also add that he's brighter than he
+looks."
+
+"Then what do you make of this business?" Scotty inquired.
+
+"I'm not that bright," Kelly replied. "Seriously, this one has me
+stumped. First of all, it's easy to understand why a shadow picked you
+up. After all, it must have been obvious that you knocked Steve's tail
+off. So they simply picked you up instead, hoping that you'd lead them
+back to Steve, or that you might be important in some way they couldn't
+understand."
+
+"It's nice to have someone do my thinking for me," Steve said. "Carry
+on, Lieutenant."
+
+"Aye, aye, Sir. The tail stuck with you. When your party split in two,
+he decided to stay with you instead of Zircon and Briotti. There could
+be two reasons: First, you were the ones who contacted Steve on the
+street. Second, you stayed at the waterfront while the others went off
+in a taxi. I like the second reason better because of what happened
+later. How about you, Steve?"
+
+"I'm with you. Go ahead."
+
+"Well, at this point I get lost. You put on your gear and swam out, not
+with any particular destination in mind, but looking for a rock or a
+coral head or something of the kind where you could see fish. The shadow
+watched you. Suddenly he got excited, grabbed a boat, and tried to run
+you down."
+
+Steve grinned at the boys. "In fact, he got so excited that he stole a
+boat right out from under the owner's nose. What do you think of that?"
+
+Rick scratched his head. "We'd about decided he was either desperate or
+stupid. I guess he was both."
+
+Kelly continued. "The big point is, what made him desperate? It could
+only have been one thing, as I see it. You were getting close to
+something, and he was afraid you'd find it. So he lost his head. That's
+borne out by the remark his pal made last night, that he'd pulled enough
+stupid stunts for one day."
+
+"But what could we have been getting close to?"
+
+"I don't know. Whatever it was, it isn't there now."
+
+Scotty and Rick sat up straight. Scotty demanded, "How do you know?"
+
+Steve smiled. "Because a team of Navy frogmen went over the entire area
+inch by inch this morning."
+
+At the boys' surprised looks, Kelly explained, "You told the Shore
+Patrol enough to get us interested. We put teams in the water at
+daylight. There's nothing there."
+
+"But there could have been," Scotty pointed out. "If they suspected we
+knew about it, they could have removed it yesterday afternoon or last
+night."
+
+"Correct," Steve agreed. "They were worried, too. Otherwise why the call
+on you last night? And the questions?" Steve paused while the waiter
+served them. "The conclusion is this: Something they value was in the
+water near where you swam. You met me yesterday morning, and they had
+already identified me. Which means that they must have agents in
+Washington who warned them JANIG was moving in on the case. Since it's
+no secret that I'm with the outfit, they could peg me easily. When you
+swam out toward this object, whatever it was, they were convinced that
+somehow JANIG had learned about it. The tail got desperate and tried to
+knock you off. Then, last night, they tried to find out what you knew,
+and how."
+
+"Who are 'they'?" Rick asked.
+
+"If I knew that, I'd wrap the case up and go home. Jimmy has been
+working on it for a week, but he hasn't any answers yet. I've been here
+twenty-four hours, and I know even less."
+
+"Could you identify the two men?" Scotty queried.
+
+"Yes. Both small fry, both local. And both are obviously green at this
+kind of business, otherwise you'd be a pair of real cold turkeys by
+now."
+
+That was true, Rick knew. Experienced agents wouldn't have given him and
+Scotty the chances that they'd seized.
+
+"The men must know what was under the water," Scotty said.
+
+"Not necessarily. They just knew it was important, and they may have
+been ordered to protect it. But your former shadow was on the griddle
+all night, and told all he knew. It wasn't much. He didn't even know who
+had hired him. He wasn't stalling, either."
+
+"What's the next step?" Rick wanted to know.
+
+"Jimmy and I will drive you to the plane. Then you take off for Clipper
+Cay. And stay there until your vacation is over. Have you a short-wave
+radio, by the way?"
+
+"Yes. Why?" Rick had an all-wave battery portable.
+
+"Monitor the Navy command frequency. Here, I'll write it down for you.
+Listen every night at six for five minutes. If I want you, I'll send a
+message. I don't think I will, but it won't do any harm to set up a
+schedule."
+
+Steve lowered his voice. "Now listen to me. This thing is big. The two
+you ran up against yesterday were not good samples. We're dealing with
+some tough professionals. I don't know who they are, but from what I've
+seen I can tell you they're dangerous. So you two are to stay out of
+this case. That is an order. Stay on Clipper Cay and have fun."
+
+"I can add a small note to that," Lieutenant Kelly said. "I'm new here.
+I was ordered down from Norfolk only a week ago. A first-class
+intelligence officer had my job. He turned up in a hospital in the
+British Virgins after being missing for two days. He had a fractured
+skull. He still doesn't know what happened to him, and neither do we."
+
+"Okay," Steve said flatly. "I appreciate the way you handled things
+yesterday, but that's the end so far as you are concerned. Get out, and
+stay out! And that's final!"
+
+
+
+
+CHAPTER VI
+
+The Deadly Tank
+
+
+The Sky Wagon droned smoothly through a series of figure eights as Rick
+and Scotty inspected every inch of Clipper Cay and its surrounding
+waters. While Rick flew, Scotty marked off landmarks on the chart of the
+island that Dr. Ernst had provided.
+
+"I wish we could spot the wreck of the _Maiden Hand_," Scotty remarked.
+
+"Too deep," Rick said. "We can't see bottom at twenty fathoms even in
+water as clear as this."
+
+"I've got everything important marked. What say we land and look over
+our property?"
+
+"Okay. I'll shoot the beach while you look for coral heads. We don't
+want to snag a pontoon."
+
+The boys had already identified their house. It was set at the edge of
+the palms, about fifty yards inland from the beach. It looked fine.
+There was a small dock to which the _Water Witch_ could be tied up when
+the scientists arrived.
+
+Rick estimated that Tony and Zircon would arrive about sundown, two
+hours hence. The boys had flown over the _Water Witch_ en route from St.
+Thomas. Apparently the scientists were enjoying the trip. Zircon had
+been sprawled in the cockpit while Tony trolled for fish.
+
+"I'm a little surprised there wasn't something wrong with the plane,"
+Rick observed. He and Scotty had gone over the Sky Wagon from propeller
+hub to rudder, fearful that the unknown enemy might have sabotaged the
+plane. But there was no sign of any tampering. However, the inspection
+had taken so long that it was late afternoon before they got away. It
+was significant and perhaps a little ominous that Steve and Jimmy Kelly
+had assigned a pair of husky Shore Patrol men with .45-caliber sidearms
+to stay with them until the plane actually took off.
+
+"Maybe the two men who came after us were acting without orders," Scotty
+replied. "Maybe the real brains of the gang aren't even interested in
+us."
+
+"I hope that you're right. See any coral heads?"
+
+Although most coral growth was limited to the reef area, outcroppings of
+coral called "heads" had grown up toward the surface in some places.
+There were none in the stretch of water before the beach house where
+Rick planned to land.
+
+"The water's clear. Pick your direction. There's not enough wind to make
+any difference."
+
+"I'll land parallel to the beach."
+
+Rick turned south down the center of the island. When he had reached the
+right position he cut the throttle, and the nose of the Sky Wagon
+dropped. He banked tightly, reversing course, until the plane was headed
+north a hundred yards out from the beach. He let the plane feel its way
+toward the water, then felt the first bump as the pontoons touched. In a
+moment they were down, and Rick swung the plane to taxi in toward their
+new home.
+
+Scotty was already stripping off his shoes and socks. As the pontoons
+touched bottom a few yards from shore, Scotty climbed out. Rick cut the
+gun while his pal pulled the plane up on the beach.
+
+Rick got out and waited until Scotty slipped his shoes on again, then
+they walked to the cottage.
+
+The door was unlocked. Few people came to Clipper Cay, and locks weren't
+considered necessary. The boys pushed open the front door and walked in.
+
+There was a large living room and three bedrooms, each with twin beds.
+In the rear of the cottage was a kitchen with kerosene stove and
+kerosene refrigerator. A fifty-gallon drum out back provided the fuel
+supply, which was piped in through copper tubing. Rick checked the fuel.
+The tank was full. He read the simple instructions tacked to the wall
+over the refrigerator, then lighted the burner. There were frozen foods
+and soft drinks as well as dairy products among their supplies, packed
+in dry ice in the _Water Witch's_ food locker; the refrigerator would be
+cold enough for the supplies by the time the boat arrived.
+
+For bathing in fresh water there was an outdoor shower, a shower head
+rigged to a five-gallon drum and supported on a frame of two-by-four
+wooden members. A canvas curtain gave privacy. Other sanitary facilities
+were equally primitive but effective.
+
+Scotty opened the door of a lean-to shed on the rear of the house. "We
+can stow our diving gear in here. There's a bench, too. Looks as though
+the owner used the place for cleaning fish and stowing his fishing
+equipment."
+
+They walked around to the front of the house where there was a small
+porch. A few wicker chairs were upended against the wall. The boys
+righted them and sat down.
+
+"This is the life," Rick observed. "Look at that view."
+
+They looked from the porch down to the sandy beach, past the pier and
+the Sky Wagon to water that was almost glassy calm. The water continued
+in a smooth stretch for about five hundred yards out to the reef. Light
+breakers foamed along the reef, and beyond, the water was a blue waste
+to the horizon. A quarter mile south, a break in the reef marked a
+passage where boats could enter.
+
+Somewhere, out beyond the reef, was the wreck of the _Maiden Hand_. In
+his mind, Rick planned how they would go about finding it. The first
+step was to rig some kind of underwater towing boards. Then he and
+Scotty, equipped with their aqualungs, would be towed behind the _Water
+Witch_, scanning the bottom as they went.
+
+He wasn't worried about finding material for the towing boards. Any kind
+of planks would do, or they could even make a tow board out of a fallen
+log, although that would be harder to control.
+
+"Come on," he invited. "Let's walk through the palms. We need a few
+planks, and we might as well get them now."
+
+By the time the scientists approached the pier, the boys had explored
+the central part of the island and had returned to the cottage lugging
+planks found in the ruin of a cottage apparently blown down by some
+long-past hurricane. They dropped the planks beside the house and
+hurried to catch the line that Zircon threw, then they warped the _Water
+Witch_ in to the dock.
+
+All hands turned to, and in a short time supplies were unloaded and
+stored, beds were made with linen and blankets loaned by Dr. Ernst, and
+the cottage began to take on an inhabited look.
+
+While Tony Briotti began preparations for dinner, the boys carried their
+aqualung equipment to the shed at the rear of the cottage and began to
+check it over. Since their lives would depend on proper functioning of
+the equipment, they inspected the regulators carefully, checking the
+condition of the neoprene flaps. Once checked, the regulators were hung
+on nails on the shed walls, out of harm's way.
+
+The next step was to inspect the tanks. Rick had already looked them
+over, but for the sake of safety the boys did it again. There were six
+of them, each of seventy-cubic-feet capacity. There was an advantage to
+this particular capacity at the depth where they expected to dive; a
+diver could work only fifteen minutes at 120 feet without requiring
+decompression, and seventy cubic feet of air would last just long
+enough. Double tanks would have meant the boys would be able to stay
+down nearly twice as long, but would also have meant the nuisance of
+waiting through the decompression period of about thirteen minutes ten
+feet below the surface on the ascent. For this reason, the boys planned
+to dive with single tanks, leaving the spares on the surface.
+
+Of course, to get even fifteen minutes of diving at twenty fathoms the
+tanks had to be filled to capacity. When full, they were under enormous
+internal pressure of over two thousand pounds per square inch. The tanks
+had been filled at Spindrift, but the boys decided to check them again,
+in case there had been some leakage through the valves during shipment.
+
+Scotty swung one tank upright and prepared to attach the pressure gauge.
+Rick, inspecting another tank for bumps that might have weakened the
+tank wall, saw him do it.
+
+For a moment Rick continued his inspection, then what he had seen
+suddenly registered. He yelled, "Scotty! The valve!"
+
+In that instant, as Scotty attached the pressure gauge, the valve blew
+out!
+
+The entire valve assembly and the pressure gauge, propelled by the
+tremendous pressure in the tank, blew straight upward, ripping clear of
+Scotty's hand and taking a patch of skin along. The ascending assembly,
+traveling with bullet speed, clipped a lock of hair from his bent head.
+
+[Illustration: _The valve assembly, traveling with bullet speed, barely
+missed Scotty's head_]
+
+Scotty yelled, "Run!"
+
+The tank, its air free to escape, writhed and turned, then fell over on
+its side. It was like an inflated balloon, turned loose to fly around a
+room. Air jetted from it with terrific velocity, so that the tank was,
+for the period while its air lasted, a true rocket.
+
+It struck the wall of the shed and went through it like paper, smashed
+into a stud and caromed slightly, so that its trajectory was altered
+enough to drive it directly at Rick. He fell flat and it went over, just
+grazing him, then flew into the palm grove. It hit a palm a slanting
+blow and turned upward, shooting high in the air, clipping off the top
+of another palm as it went.
+
+As the boys watched, horrified, it climbed straight up. Then, its high
+pressure nearly exhausted, it turned leisurely and plunged back into the
+grove, almost burying itself in the sandy soil.
+
+The boys sat down and stared weakly at each other. For the first time,
+Rick noted that Scotty's hand was bleeding. He said shakily, "Here, let
+me look at that."
+
+The scientists rushed out of the house and demanded to know what had
+happened. The tank had blown through its devastating course so fast that
+they had not even had time to get outdoors.
+
+Zircon bandaged Scotty's hand with supplies from the first-aid kit while
+the boys told them what had happened. Tony said, "Very careless, leaving
+a valve loose like that."
+
+Rick told him positively, "It wasn't left unscrewed, Tony. We always use
+a wrench on those valves because high pressure is so dangerous. And it
+wasn't like that yesterday. I checked the tanks when we stowed them on
+the boat."
+
+Scotty gestured toward the other tanks. "Better take a look."
+
+Rick did so, and gave a low whistle. The valves had all been loosened.
+They were in place only by a turn or two of the threads.
+
+"They could have come out any time," he said grimly. "Any rough handling
+could have knocked a valve out. And if it had happened on the boat, the
+tank would have gone right through the bottom or side. It was just luck
+Scotty and I weren't killed."
+
+Zircon wordlessly found the valve wrench and got to work screwing the
+assemblies back in place. The others watched silently, until Scotty
+said, "Well, at least we're out of St. Thomas. There won't be any more
+sabotage!"
+
+
+
+
+CHAPTER VII
+
+The Derelict
+
+
+Rick and Scotty were up at dawn the next morning. They didn't bother
+with anything so prosaic as breakfast. Instead, they collected masks,
+snorkels, and flippers for a preliminary dip. They didn't use the lungs;
+those were to be saved for more important work than casual swimming.
+
+For this first swim, each boy selected a spear gun. Scotty chose the
+same light spring gun he had used to save them from the shadow, while
+Rick took his favorite gun, a four-strand rubber-powered weapon that
+packed a terrific wallop. They belted on their knives and blew up their
+plastic floats. These were essential for resting, if necessary, and for
+bringing home their catch, if any. Once a fish was speared, it was
+important to get it out of the water as soon as possible, since blood
+would bring sharks or barracuda if any were in the neighborhood.
+
+"Come on," Rick said impatiently. "Let's go."
+
+"I'm coming." Scotty finished coiling up the light line he used to
+tether the float to his belt, and they stepped into the water. The
+temperature was just right. They ducked under, then put on their
+equipment. Scotty pulled a rubber glove over his injured hand. Pushing
+their floats ahead of them, faces down in the water, they started for
+the reef.
+
+Rick watched the bottom carefully. It was clear sand, with no sign of
+life other than an occasional conch or other shellfish. This was to be
+expected, since marine life tended to collect around reefs, rocks,
+pilings, wrecks, and similar things. As they approached the reef, coral
+heads and outcroppings began to appear. And with them, fish.
+
+Rick hooted for Scotty's attention, then lifted his head and let his
+mouthpiece fall free. "Let's go outside!" he called as Scotty looked up.
+The other boy nodded agreement. Both were anxious to examine the reef.
+
+The surf was light. They crossed over the reef by towing their floats
+and timing their movements through the breakers. Once beyond the point
+where the waves broke, the water was fairly calm, with only light surges
+from the passing waves.
+
+Rick looked down and saw the reef drop away under him. It shelved off
+perhaps twenty feet down, then beyond the shelf it fell away into the
+depths. He looked into the blueness with a stirring of excitement. To
+find the _Maiden Hand_, they would have to swim into that mysterious
+blue realm.
+
+Scotty hooted. Rick looked, and followed the direction of his pointing
+arm. There, browsing around the shelf below, was a handsome red snapper,
+perhaps fifteen inches long. They had stopped in Miami and Rick had
+noticed that red-snapper prices were about the same as those for steak.
+There was no doubt that the fish was very good eating. He gestured to
+Scotty to go after it, then floated motionless, watching.
+
+Scotty put the loader over the tip of his spear and pushed down, cocking
+the gun. Then, without a splash, he slid under the water. Rick watched
+as his fins propelled him slowly toward the snapper. Scotty was moving
+slowly, because this was the prime rule in underwater hunting. As he
+swam, he extended the spear gun, aiming over the short barrel. The
+snapper stopped browsing and his dorsal fin suddenly erected, a sign of
+alarm. But he didn't move because he was not yet sure the big invader
+was an enemy. Before he could make up his mind, Scotty fired.
+
+The spear took the fish right behind the gills. He gave a quick spurt
+that brought the line humming from its spool. Scotty followed quickly,
+caught the shaft, then sped upward to where Rick waited.
+
+"Good shot," Rick complimented him as Scotty caught his float. Together,
+they took the fish off the shaft and examined him with some pride. Their
+first catch off Clipper Cay was a good one. The snapper was pink and
+firm-fleshed. He would make good eating.
+
+Rick put his face down in the water again while Scotty secured the catch
+to his float. As he did so he saw a target and hooted for attention.
+Scotty joined him and they looked down to where a barracuda hovered
+motionless.
+
+The 'cuda was perhaps two and a half feet long, not big as such
+predators went, but big enough. Scotty motioned to Rick to get him.
+Obviously the fish had been attracted by the blood or the struggles of
+the snapper. Rick hoped that his big brothers wouldn't join him. This
+one was plenty big enough. While Scotty held both floats, Rick charged
+his gun, pulling back the strong rubbers a pair at a time. Then he
+checked his safety line, filled his lungs, and went under.
+
+The barracuda hovered, waiting. Rick knew that his apparent disinterest
+could change to lightning flight. Few fish were so fast. He followed
+Scotty's example, moving slowly toward the quarry. He was a dozen feet
+down now, and in the lessened light the barracuda loomed large, a slim
+arrow of a fish, poised for flight.
+
+The spear gun was extended, the spear point nearing firing range. Rick
+planned to shoot from about six feet. He doubted that he could get
+closer. Flippers propelling him gently, he closed. Now he could see the
+pointed jaws that contained razor-edged teeth. The fish was watching
+him, but without apparent fear.
+
+The barracuda head was squarely in his sights. Rick squeezed the
+trigger.
+
+For a moment he thought he had missed, then the safety line ran out and
+the jerk almost pulled the gun from his hands. He was running out of
+breath, too. Quickly he planed for the surface, feeling the fury on the
+end of his line. He broke water, gulped air, then dove again. He pulled
+in the line until he saw the fish struggling. He had nearly missed. The
+harpoon had taken the barracuda near the tail, fortunately hitting the
+spine. Rick pulled him in, hand over hand, then gripped his spear by the
+extreme end. He had no desire to close with those slashing, dangerous
+jaws. Holding fast to the spear he shot to the surface again. Scotty was
+waiting, knife in hand. As Rick extended the spear toward him the keen
+knife flashed across the 'cuda's spine just behind the gills. Rick
+tossed his gun onto the float, then together they heaved the fish up
+beside it.
+
+"Spindrift was never like this," Scotty said, grinning.
+
+Rick gulped air and grinned back.
+
+A hail from the shore reached them. They turned and saw Tony Briotti. He
+was waving a frying pan in a signal for breakfast. Suddenly Rick
+realized that he was famished.
+
+"Let's go," he said. "We'll trade these for bacon and eggs."
+
+It was nearly noon before they got into the water again. The first part
+of the morning was spent in fashioning sea sleds from the planks the
+boys had gathered. This was simple enough, but it took a little time.
+First the planks were cut to proper length, then two of them were nailed
+together. A bridle was arranged so that they could be towed, and spare
+weight belts and weights were used to counteract their bouyancy. They
+were very much like the aqua-planes commonly towed behind motorboats,
+but much cruder, and designed to go under rather than remain on the
+surface.
+
+Two long ropes were arranged so that a sled could be towed on either
+side of the _Water Witch_. Once this was done, the boys rechecked their
+equipment, attached the regulators to the tanks, and carried them to the
+beach.
+
+Zircon would pilot the boat, following the 120-foot mark on the chart.
+Tony would act as tender at the stern, while Rick and Scotty would ride
+the sleds. The first leg would take them through the reef channel, then
+south to the tip of the island, reverse course and north again, staying
+at the twenty-fathom mark. Zircon was sure that he would be able to
+follow the prescribed course by judging his distance from the reef.
+
+When all was in readiness, they loaded their gear aboard the _Water
+Witch_, including the spare tanks. Only the runaway tank was missing,
+and Rick had determined that its wild flight had not weakened it. The
+valve and pressure gauge had been recovered after a considerable search,
+and the tank could be refilled with the others.
+
+Zircon took the _Water Witch_ through the reef, and the boys donned
+their equipment while Tony swung the ladder outboard. Rick checked his
+own straps, and then those of Scotty, while Scotty returned the favor.
+Then each checked the flow of air through his mouthpiece, and made sure
+the reserve rod was in the "up" position. This done, they entered the
+water. Tony tossed the boards over and made sure the lines were secured.
+
+Rick and Scotty paddled the boards to the extreme length of the lines,
+then separated as much as the lines allowed. They were about thirty feet
+apart and a hundred feet behind the boat.
+
+They waved their readiness to Tony, who relayed the go-ahead to Zircon.
+The boat started slowly.
+
+Rick moved forward on his board, and the weighted board tilted down. It
+acted as a hydrofoil, its forward motion pulling it deeper into the
+water. Rick waited until he was only ten feet from the bottom, then
+shifted his weight back again. Obediently the board tilted upward and
+raced for the surface. Rick moved forward again just in time to keep
+from breaking through the surface. By adjusting his weight, he could
+keep the board level, or go up or down. It wasn't easy and he had to
+fight the board level almost constantly.
+
+Bubbles rose from the regulator between his shoulder blades as he
+breathed rhythmically. The lung performed effortlessly, giving him as
+much air as he needed. He felt the pressure on his ears as he steered
+the board toward bottom, and there was an instant of pain before his
+ears adjusted.
+
+The bottom was sandy. To his right he saw the wall of the reef, and once
+a startled snook shot out of his way. To his left he could see Scotty.
+Before he knew it the boat had throttled down, a signal that they were
+at the southern end of the reef. He tilted upward and surfaced.
+
+Tony called, "How is it?"
+
+"Great!" Rick called back. "But we'll need lots more line. It was
+shallow on the way down, but if we try to go any deeper the angle of the
+line will make the boards come up."
+
+"You should try it," Scotty said. "Honestly, Tony, it's wonderful!"
+
+"I'll try it a little later," Tony promised. "I'm giving you all the
+line we have, about three hundred feet each. If you can't make it,
+surface. We'll have to splice the two lines together and use just one
+board."
+
+Zircon came to the stern and bellowed, "You forgot these!"
+
+He tossed in two fishing floats and coils of line. Those were in case
+they found the wreck. Whoever spotted it was to drop off his board,
+secure the line to the wreck, and let the float rise to the surface. In
+that way, they would have a guide.
+
+Each boy took one of the units and fastened it to his weight belt.
+
+"We're off!" Zircon called. "Ready?"
+
+The boys yelled that they were. Rick fitted his mouthpiece and checked
+the seal of his mask. Scotty did the same, then both tilted their boards
+and slid under.
+
+On the northbound leg they had trouble keeping the boards down because
+of the tendency of the lead rope to pull the front of the boards up, but
+by crawling far forward, they managed.
+
+They were deeper than they had ever gone before, but Rick felt no
+sensation of fright or strangeness. It was a green world, not dark but
+yet not bright. The light was subdued, filtered by the fathoms of water.
+The bottom was mostly clear sand, dotted now and then by patches of
+growth. There did not seem to be many fish, or perhaps their eyes were
+not adjusted to the subdued light. Scotty was close to the reef on the
+northbound leg, while Rick was about twenty feet farther out.
+
+For long moments there was only the sensation of rushing through the
+water, the distant throb of the engines, and the sound of their own
+bubbles. Then, ahead, Rick saw a mass of growth and tilted his board
+upward just in time to clear it.
+
+Scotty hooted once, then again. Rick turned in time to see his pal's
+board leap ahead, free of Scotty's weight. Sudden fear gripped him. Had
+Scotty been caught? Instantly he released his own board and saw it scoot
+for the surface. He reversed his course and swam rapidly back.
+
+The obstruction he had cleared was dead ahead. And there were fish! So
+many that they seemed like a swarm of flies around it. The biggest was
+not more than five inches long. Then he saw Scotty. His friend was
+fastening the float line to a projection!
+
+Rick's heart leaped. What he thought was a rock formation on the sea
+floor was the wreck of a ship! Scotty had recognized it and dropped off.
+The _Maiden Hand_? He hooted and Scotty looked up. The other boy shook
+his head.
+
+It wasn't the _Maiden Hand_, then. But how did Scotty know? In a moment,
+when he joined the other boy, he saw the curling edges of steel plate.
+This was a steel ship, then, and not a very large one at that. He
+estimated its length as not more than a hundred feet. Still, it was a
+wreck--their first. There, at twenty fathoms, he and Scotty shook hands
+solemnly while the tiny fish swam around them like curious gnats.
+
+Scotty finished tying his line and unwound it from the wooden spool. The
+float rose upward and vanished far overhead. They heard the throb of the
+returning boat, and Rick hooted twice, the signal to surface. Scotty
+nodded, and they went up, slowly, careful to breathe naturally and not
+to overtake their small bubbles, as doctrine dictated. In a moment Rick
+saw the hull of the boat, propellers barely turning, and knew that
+Zircon was holding position overhead.
+
+They broke water off the side of the _Water Witch_, and Rick waited
+until Scotty hailed the scientists. "We found a wreck, but it's a steel
+ship."
+
+"Come aboard!" Tony called, and helped them up the ladder when they
+complied. The tanks were cumbersome when out of the water.
+
+"It's a fish paradise!" Rick said excitedly. "I'm going to get my camera
+working and take some pictures. You've got to go down and look, both of
+you."
+
+"How did you spot it?" Zircon asked.
+
+"Scotty did. I thought it was a rock formation and went over it, but
+Scotty dropped off."
+
+"I saw curled plate," Scotty answered. "I knew it wasn't the _Maiden
+Hand_, with steel sides, but I didn't think we'd want to pass up a
+wreck."
+
+"You were so right," Rick agreed, grinning.
+
+A check of their tanks with the gauge showed that only about five
+minutes diving time remained at the twenty-fathom depth, so the
+regulators were transferred to spare tanks. Tony and Zircon, already in
+trunks, donned diving gear and followed Scotty's line to the bottom. The
+boys waited impatiently, Scotty taking the helm to hold the boat in
+place.
+
+Ten minutes later the scientists surfaced, and Rick helped them aboard.
+Tony removed his mask and grinned. "It's as wonderful as you said it
+was."
+
+"What kind of ship was it?" Rick asked.
+
+Tony had been a destroyer skipper during the war and he knew ships.
+
+"Probably an interisland cargo carrier of some kind. At any rate, it
+appears to be a small cargo ship. It's so overgrown with marine growth
+that the shape is cluttered. It might have been a small tanker."
+
+"We can explore it from stem to stern," Rick suggested excitedly.
+
+Scotty joined them and commented, "But not right now. We'll have to go
+ashore and charge the tanks. There may be time for one more dive this
+afternoon if we hurry."
+
+"Besides," Hobart Zircon said with a smile, "I'm hungry. As you say,
+Rick, diving certainly develops the appetite!"
+
+They docked, and Tony and Zircon went off to see about preparing
+sandwiches. The boys decided that rather than carry the tanks back and
+forth from the pier to the shed, it would be more sensible to bring
+their small, portable gas-driven compressor to the pier.
+
+Scotty went after it while Rick tied the tanks to the afterrail of the
+_Water Witch_, in position for filling.
+
+A yell from Scotty stopped him. He looked up and saw his friend beckon,
+and ran down the pier to the house. The scientists joined him and Scotty
+at the shed where the compressor had been stored.
+
+"We've been sabotaged again," Scotty told them flatly. "There's oil in
+the compressor!"
+
+"Are you certain?" Zircon pressed close to examine the machine.
+
+"Yes. I stumbled over my own feet and tipped the compressor on its side.
+And oil ran out through the air fitting. Look!" Scotty held up his hand,
+and it was smeared with glistening oil.
+
+A cold shiver traced its way down Rick's spine. Oil in a compressor was
+blown into fine particles, too small to be seen. If they got into an air
+tank they would be breathed in, leaving a thin coating on a diver's
+lungs. The result was a condition almost exactly like pneumonia, called
+"lipoid pneumonia." Their special filter, designed by Zircon, probably
+would have taken all the oil particles out of the air before it got into
+the tanks, but that didn't alter the fact that faced them. Someone had
+deliberately put oil in the compressor. Someone just didn't want them
+around!
+
+
+
+
+CHAPTER VIII
+
+The Fancy Frogmen
+
+
+"The question is," Rick stated, "when was the oil put in? While we were
+at Charlotte Amalie? Or while we were out hunting the wreck just now?"
+
+"In Charlotte Amalie, of course," Tony said. "Why do you think it might
+have been done just a little while ago?"
+
+Rick shrugged. He had no answer to that. The question had popped into
+his mind unbidden.
+
+"We didn't take the compressor apart," Scotty reminded him.
+
+That was true. But Rick had started it in Charlotte Amalie to be sure it
+was functioning. There was no oil in it then. He said as much.
+
+"You started the compressor at the same time you checked the tanks,"
+Zircon reminded him. "I believe the oil was put in at the same time the
+valves were loosened."
+
+That seemed reasonable. Rick put aside his hunch. "Well, we found it in
+time, anyway. Now Scotty and I will have to tear the compressor down and
+clean it before we can recharge the tanks."
+
+"After lunch," Tony said. "Don't you remember? A diver is supposed to
+rest after each dive. Relax, and I'll have some sandwiches ready in a
+few minutes."
+
+All hands were hungry. Scotty stowed away four sandwiches and Rick did
+nearly as well. Then they started work on the compressor. It wasn't a
+hard job, but it was tedious, and nearly two hours elapsed before they
+finished. Each part had to be washed in soap and water, then carefully
+dried. Finally, the compressor was ready. They carried it to the boat,
+started the gas engine, and connected the tanks. But before the air
+started to flow, Rick carefully inspected the filter system to be sure
+that hadn't been tampered with too.
+
+"You know," he observed, "these enemies Steve is hunting know a lot
+about sport diving."
+
+Scotty considered. "They knew that tanks could be dangerous, and they
+knew that oil in a compressor is dangerous. You're right, Rick. They
+know plenty about it."
+
+"But it doesn't do us much good to know that they know," Rick concluded.
+"Well, now what? It will be a few hours before all the tanks are
+charged."
+
+"Where are Zircon and Tony?"
+
+"Napping. We probably should join them."
+
+"Not me. There's nothing to do after sundown but sleep. I'd like to take
+a walk and look the island over."
+
+Rick sighed. "Always an eager beaver. I'll go with you, if you don't
+walk fast."
+
+They turned north and walked up the beach. Somewhere off this stretch of
+beach was the _Maiden Hand_. But where? They strolled along leisurely,
+stopping now and then to examine some bit of beach flotsam. There were
+shells, but most of them were small and water worn.
+
+"We'll have to collect a few shells on the reef," Rick said. "Barby will
+be disappointed if we don't."
+
+"That's easy enough to do," Scotty replied. "I saw half a dozen
+different varieties this morning."
+
+They passed a beach house, obviously empty. Rick gestured toward it.
+"Funny how few people there are here. If I owned a place on this island
+I'd be here all the time."
+
+"Unless you had to make a living," Scotty added practically. "This isn't
+the season for vacations. I expect vacation time finds plenty of
+activity here. There's one cabin occupied to the south of us. I saw
+people there this morning. They're probably the same ones who waved at
+us from a boat when we flew over day before yesterday."
+
+"The boat isn't there now," Rick observed. "At least, I haven't seen
+it."
+
+"They may have gone to St. Thomas for supplies. Or they may have gone
+home." Scotty pointed to what seemed to be the largest house on the
+island, near the northern tip. "That's quite a place. Let's go have a
+look."
+
+There was a long pier in front of the house, and, unlike the others on
+the island, this house had a second story. There was no sign of life.
+They walked around it and found a barbecue pit. Scotty examined it.
+"This has been used recently, probably in the past few days."
+
+Rick bent down and peered at a scrap of meat. "You're right. They had
+steak. And this piece hasn't dried out yet."
+
+"Maybe they're still here." Scotty walked to the back of the house.
+"They might be out fishing or something." He looked in a window and
+called urgently, "Rick! Look!"
+
+Rick hurried to his side and peered in. The room was evidently used for
+storing diving equipment. Hung along one wall were three full diving
+suits of expensive make. Next to them, neatly racked, was an assortment
+of spear guns, all of the spring type, and all of Italian make.
+
+On another wall were three Scuba regulators, not aqualung types such as
+the boys used, but the variety that carries a full face mask through
+which the diver breathes. In a rack on the floor were nine spare tanks
+and a compressor much larger and more expensive than theirs.
+
+Swim fins, also of Italian make, were lying on a table. They were the
+shoe type, put on like a pair of slippers. Rick identified an underwater
+camera, complete with steering fins and outside controls, and a number
+of face masks with built-in snorkels. Boxes stacked on the floor carried
+labels that identified them as midseason suits of French make.
+
+"We've found some real fancy frogmen," Scotty observed. "This place
+looks like a high-priced show-room for diving gear."
+
+"Pretty plush," Rick agreed.
+
+They wandered back down to the beach and found that this area of the
+island was apparently more open to the sea. There were bits of flotsam,
+including coconuts that had washed in. The sea shells were larger, and
+they found a few worth picking up.
+
+Scotty beckoned and pointed to a piece of wood, nearly buried in the
+sand. "What do you make of this?"
+
+Rick examined it. It was curved, and a shred of green metal still clung
+to the rusty remains of an ancient hand-fashioned nail. He looked up
+with sudden excitement. "It's a section of a ship rib. And a pretty old
+one, too." His finger indicated the shred of metal. "Copper. Or used to
+be." He broke it off. "Completely oxidized. It's been in the water a
+long time, perhaps even centuries."
+
+The boys stared out at the reef, both half afraid to put their thoughts
+into words. Finally Scotty asked, "Do you remember reading about any
+earthquakes or big tidal waves down here recently?"
+
+Rick tried to recall. "No. Why?"
+
+"Well, the _Maiden Hand_ has been under the water out here for a couple
+of centuries--and in pretty deep water, too. It would take some
+disturbance that could reach down a hundred and twenty feet to break off
+a chunk."
+
+Rick grinned. "You're right. But we haven't anything to lose by taking a
+look, have we?"
+
+They trotted down the beach toward their own house at a half run. Rick
+looked at his watch. "At least one pair of tanks should be full by now,
+and there's plenty of time for a dive. Come on!"
+
+They paused at the pier, put the pressure gauge on the first two tanks
+in series, and found them charged, as Rick had predicted. Then they ran
+for the house.
+
+Zircon and Tony were gone and there was a note on the living-room table.
+"_We're exploring the southern end. Be back in an hour or two._"
+
+"Shall we wait?" Scotty asked.
+
+"No need. We can take our floats. Let's get going."
+
+They changed to trunks. Then, since they would not have anyone on the
+surface to keep track of time or depth, strapped on wrist watches,
+compasses, and wrist depth gauges. Floats and weight belts were put on,
+then the boys added small plastic slates and pencils for writing
+underwater. Knives, masks, snorkels, their favorite guns, fins, and
+lungs completed their equipment.
+
+"Shall we walk up the beach, or swim?"
+
+"Swim," Rick said promptly. "This stuff is too heavy to carry
+comfortably."
+
+They launched floats, placed aqualung mouthpieces on top of their masks,
+and swam parallel to the beach. By using snorkels they avoided the
+effort of lifting their faces out of water to breathe and conserved the
+air in the tanks. With effective but effortless leg strokes they moved
+along rapidly.
+
+As they approached the ship rib that Scotty had found they turned and
+swam straight out toward the reef, crossed it, then came to a halt.
+
+"Let's tie our floats to something," Rick suggested, and Scotty nodded.
+
+Aqualung mouthpieces replaced the snorkels, and each boy tested his flow
+of air, checked to be sure his mask was connected to the lung by a
+safety line, charged his gun, and set his watch. The watches, designed
+especially for underwater swimming, had an outer dial that could be set
+to show elapsed diving time.
+
+Rick hooted and pointed down. Scotty nodded and they submerged. Because
+of their belt weights, and the weight of air in their tanks, they were
+just heavy enough to sink slowly. After the dive, when the air in the
+tanks was nearly exhausted, they would weigh about five pounds less and
+have a slight positive buoyancy that would help them to rise.
+
+They found coral outcroppings and tied their float lines, being careful
+not to cut their hands. Rick suddenly wished they had brought canvas
+gloves. Scotty still wore a single rubber one.
+
+Then, with a few strong kicks to overcome their inertia, they started
+down the face of the reef. It fell off sharply for about forty feet,
+then more gradually until sand bottom was reached at about ninety feet.
+
+Rick felt the sensation of thrusting his face into a wedge as the
+pressure increased. He swallowed a couple of times and felt his ears
+equalize, but his mask was beginning to hurt. He exhaled through his
+nose and equalized the pressure inside the mask.
+
+There were plenty of fish around now. A grouper saw them coming and
+ducked into his hole in the coral. A fairly large moray eel, only his
+head visible, watched their progress. Tiny demoiselles fluttered around
+them, and a pair of red squirrelfish watched from the shelter of a
+purple coral fan.
+
+The coral growth was spectacular, with fantastic shapes and colors.
+Then, as they went deeper, the colors gradually faded to a uniform
+green. Rick knew from underwater flash photographs that the appearance
+was deceptive. The colors remained, but the quality of light changed.
+
+Scotty hooted four times, the signal for danger! Rick looked and saw a
+barracuda hovering near by. He gulped. The fish was easily five feet
+long. Both boys lifted their spear guns just in case the 'cuda attacked,
+but the motion alarmed him and he was gone with one powerful flick of
+his tail.
+
+Rick consulted his wrist depth gauge, holding it close to his face
+plate. They were at bottom at ninety feet, and the clean sand dropped
+away at an angle of about thirty degrees. The boys planed downward, a
+few feet above the sand until Rick's gauge read 120 feet. This was the
+limit of their dive. Going deeper would mean stopping for decompression
+on the way up.
+
+He recalled that the waves came into the beach from a slightly northerly
+direction and motioned to Scotty that they should turn north. Scotty
+moved out to the limit of visibility, and they swam on a compass heading
+of north, watching for any sign of a wreck. Now and then a coral shelf
+extended out from the reef, but they saw nothing that could have been a
+wreck. Once they swam over a patch of marine growth perhaps twenty feet
+long and ten wide, and a huge eagle ray lifted from it and glided off
+like a weird futuristic airplane.
+
+It was quiet, except for the regular chuckle of their exhausts, and the
+light was subdued and even. It was a world without shadows. Still, Rick
+thought, there was plenty of light for photography. Next time he would
+bring his camera.
+
+The watch showed him that over half their allotted time was gone, and he
+hooted once to Scotty, then reversed course, heading back toward their
+floats.
+
+They approached the patch where they had seen the ray and Rick paused
+suddenly. There was an odd shape on the sand near the patch. He
+flippered over to it and examined it. Scotty joined him. It looked like
+an oversized mushroom protruding from the sand at an angle.
+
+Rick unsheathed his knife and poked at it. The sharp tip penetrated for
+a fraction of an inch, then stopped. It was either rock or metal, and
+judging from the shape, it was unlikely that it was rock. He put his
+knife under it and pried, and the thing moved in the sand.
+
+Both boys went to work on it, scooping the sand from around it. In a
+moment they had it clear. It was something like a dumbbell, covered with
+marine growth where it had been above the sand, but fairly smooth under
+it.
+
+Rick took his belt slate and scribbled, "Metal."
+
+Scotty nodded. Then both of them turned to look at the patch of marine
+life.
+
+A distant throb, as though of a boat, caught their attention. They
+looked up, but the surface was invisible.
+
+It was Tony and Zircon, Rick decided. They probably had returned to the
+cottage and found the diving equipment missing. They could spot the
+location where the boys were diving easily enough, first by the floats,
+then by the bubbles of their exhausts.
+
+Scotty hooted suddenly, four times. Rick turned quickly in time to see a
+six-foot shark speed past. The tips of the pectoral fins and the second
+dorsal were darker than the rest of the fish, and Rick identified it as
+a black-tipped shark. Obviously, the shark was on business of its own,
+not particularly interested in them. Still, it was curious. The shark
+was rushing almost straight up.
+
+[Illustration: _Rick turned in time to see a six-foot shark speed past_]
+
+Scotty gripped his arm and pointed. More sharks! Another black tip. And
+a ten-foot leopard shark! All rushing upward.
+
+The boys watched tensely, and then out of the dimness above something
+sped down at them, followed by the sharks. It landed in the clear sand
+just beyond the marine growth. Rick saw a black tip go for it, then the
+black tip was struck from the side by the big leopard. In spite of his
+sudden apprehension, Rick couldn't help wishing for his camera.
+
+The sharks rushed again, and the falling object was lifted from the sand
+by the disturbed water. This time, Rick recognized it. A chicken! It was
+tied to a length of string from which dangled a lead sinker. The bird
+was dead, but apparently freshly so. He knew that it was the chicken
+blood that had brought the sharks--and a giant barracuda! The great
+fish, a full six feet in length, slashed past the sharks and tore a
+chunk out of the bird.
+
+The leopard shark made a fast pass at the barracuda, then turned and
+snapped at a black tip. Rick gulped. A hole suddenly appeared in the
+black's side, as smooth as though scooped out of ice cream. And then the
+other sharks hit the wounded black tip.
+
+There were many sharks now, worrying the chicken and the wounded black
+tip like fierce dogs over scraps of meat. Rick thought, "We'd better get
+out of here!" He hooted twice at Scotty, the signal to ascend. Scotty
+motioned to him to retreat. Rick picked up the dumbbell-shaped object.
+It was heavy, but not too heavy to handle, and he started a slow retreat
+along the sand.
+
+The sharks were paying no attention to the boys, but Rick wasn't at all
+sure that they wouldn't, once the supply of chicken and wounded shark
+were exhausted. His mind raced. Where had the chicken come from? Whoever
+had tossed it into the water would have known that the blood would bring
+sharks. It wasn't a casual toss, either. Not when the chicken had been
+weighted with a fishing sinker big enough to carry it to the bottom.
+Tony and Zircon would never do such a thing. Besides, they had no
+chickens.
+
+Rick and Scotty backed far enough away so that the sharks could no
+longer be seen. Then, heading toward the reef, they started for the
+surface. Scotty was slightly in the lead, and Rick kept glancing back in
+case one of the big fish decided to follow. But they reached the surface
+without incident and broke water about two hundred feet from their
+floats. There was no boat in sight.
+
+Replacing aqualung tubes with snorkels, they swam on the surface, faces
+down, alert for sharks. When they reached the floats, Scotty kept watch
+from the surface while Rick dove to untie the lines.
+
+As they climbed on the floats and lifted masks, Scotty and Rick pointed
+and yelled "Hey!" simultaneously.
+
+But they had seen different things. Rick had seen the _Water Witch_ pass
+through the reef and head for them. Scotty had seen another boat, a big
+cabin cruiser, tied up at the pier in front of the house occupied by the
+fancy frogmen!
+
+Rick turned and looked at the cruiser, then at the house. He was in time
+to see the front door close. There would have been plenty of time for
+someone to drop the chicken from the cruiser and then cross the reef and
+tie up at the dock.
+
+"I'll bet that's where the chicken came from," Rick said harshly.
+
+"That's a bet I won't take," Scotty returned. "But you can bet we'll
+find out!"
+
+
+
+
+CHAPTER IX
+
+Wreck of the "Maiden Hand"
+
+
+Tony Briotti examined the metallic object they had brought from the
+bottom, then took his knife and scraped at it. Under the covering of
+marine growth, red rust appeared. He looked at Hobart Zircon. "Recognize
+this, Hobart?"
+
+"There's only one thing I can think of that fits the shape, Tony. Bar
+shot."
+
+"My conclusion exactly." Tony weighed the thing in his hand. He grinned
+at the boys. "Adventure-prone, and lucky. Describe the place where you
+found it."
+
+Rick did so, concluding, "The patch didn't look anything like a ship,
+though. If that's what you're thinking."
+
+"After two centuries, the ship would no longer look like a ship. But
+this is unquestionably a bar shot for an ancient cannon. It was used to
+cut ship's rigging, and to knock down masts, and create other damage of
+that sort. It's likely that the pirates, or the _Maiden Hand_, would
+have carried bar shot."
+
+"I think you have found the ship," Zircon told them, "and the question
+about earthquakes was a good one. There was a heavy quake in this region
+about a year ago. I had occasion to recall it a half hour ago when we
+found a slight fault at the southern tip of the island that had
+uncovered an Indian midden."
+
+"And a fine one," Tony added. "You boys can dive for treasure if you
+want to. I've some work of my own to do."
+
+"Incidentally," Scotty reminded Rick, "in the confusion below we forgot
+to send up a buoy. Hope we can find the place again."
+
+"We can."
+
+"What confusion?" Zircon asked.
+
+Rick told him. "A freshly killed chicken was dropped near us. And it
+must have been bleeding when it hit the water, because we suddenly had a
+shark convention around us." He pointed to the boat tied at the pier,
+now far behind them because the _Water Witch_ had been moving. "And we
+think that was the boat that dropped it."
+
+"It was weighted," Scotty added.
+
+The scientists looked at each other. Tony grunted. "It makes no sense,
+Hobart. Why would anyone weight a freshly killed chicken and throw it
+over the side?"
+
+"No reason at all," the big scientist said, "unless he wanted to create
+mischief below."
+
+"But just the act of dropping a chicken wouldn't ensure harm to divers
+below," Tony objected.
+
+"That's why I said mischief. Inexperienced divers might panic under such
+circumstances and attract the sharks to themselves."
+
+Rick hazarded a guess. "What if they just wanted to keep people from
+diving in the area?"
+
+"That might be one way of doing it." Zircon said thoughtfully. "Are you
+suggesting that there are others after the _Maiden Hand_ treasure?"
+
+Scotty spoke up. "How could anyone else find out about the treasure?"
+
+"It's possible that there are other references besides the logbook we
+found," Tony replied. "But it would be too farfetched to speculate that
+other treasure hunters had found the location and were diving right at
+this time."
+
+"This might be related to what happened on St. Thomas," Rick ventured.
+
+Zircon shook his massive head. "Extremely unlikely. Consider." He ticked
+off the points on his fingers. "Who knew we were coming to Clipper Cay?
+Ernst, Steve, and his Navy friend. We did not mention it to the people
+from whom we bought supplies, nor did we discuss it in the presence of
+others. We were not followed here. No, Rick, I think that we cannot
+blame this incident on the ones in St. Thomas."
+
+"Then it was a dangerous practical joke," Tony concluded. "Unless there
+was some legitimate reason for throwing the chicken over that we don't
+know about."
+
+Zircon steered the _Water Witch_ through the reef entrance, and the
+Spindrifters tied up at the dock. Rick and Scotty inspected the
+compressor and then measured the amount of air in the tanks. They hooked
+the tanks up, refilled the gas tank of the compressor engine, and left
+the tanks to fill while they went to the cottage.
+
+Rick and Zircon prepared dinner while Tony and Scotty refilled the
+gasoline lanterns that provided light, and generally straightened up the
+cottage.
+
+Rick called, "Tony, tell us more about this Indian stuff you found."
+
+Scotty added, "And what's a midden, anyway?"
+
+Tony leaned on his broom. "A midden is a polite name for a refuse heap.
+Before the days of rubbish collection, people used to dump their trash
+in the yard. The Indians did, and thereby provided archaeologists with
+an important source of information. Apparently a tribe lived on this
+island, close to the southern tip. It's likely that they simply dumped
+their rubbish into the water. Well, the earthquake Hobart spoke of
+shifted the old coral formations at the southern tip slightly and lifted
+a few square yards out of the water."
+
+He went to the front porch and brought back a curved piece of material,
+encrusted with coral. "This used to be a pottery bowl, probably Taino in
+origin. I'll probably find many like it."
+
+It didn't look like much of a find to Rick, but he knew that Tony's
+trained eyes could see many things that he couldn't. "You'll dive with
+us, though, won't you?" he asked.
+
+"Of course. But you and Scotty are the real enthusiasts, and the diving
+I do will use up air that you properly should be using. I'll go down
+with you in the morning, because I want a look at the wreck. But after
+that I think Hobart and I can amuse ourselves on the midden while you
+and Scotty hunt treasure. Of course we'll be ready to help if you need
+us."
+
+A few minutes before six, Rick turned on his portable all-wave radio to
+the channel Steve had given him, but the air was silent. He waited for
+ten minutes, then snapped it off again. Apparently Steve had no message
+for them.
+
+Dinner consisted of fresh snapper and barracuda steaks served with
+coconut sauce for which Zircon had learned the recipe during his tours
+of the Pacific. It was delicious, and Rick wondered about the fussiness
+of people who refuse to eat barracuda simply because the fish is a noted
+predator. However, he knew that people are served barracuda every day
+under less offensive names.
+
+After dinner they sat over coffee on the porch and watched the sun sink
+beyond the reef. It was like a Pacific sunset--colorful and somehow
+soothing.
+
+The boys walked to the pier, checked their tanks, and found them fully
+charged. Then, at Scotty's suggestion, they locked tanks and compressor
+in the cabin of the _Water Witch_. Fresh-water rinses for the remainder
+of their equipment followed, and they carried the equipment into the
+house.
+
+Zircon was already engrossed in a book, while Tony was engaged in
+scraping the pottery shard he had found. The boys watched him for a few
+minutes, then Scotty suggested, "How about a walk?"
+
+"Okay." There was an idea stirring in the back of Rick's head. As they
+walked down to the beach he said, "We ought to take a look at the folks
+who own that boat."
+
+And Scotty said in the same breath, "Let's visit the fancy frogmen."
+
+They grinned at each other, amused at how much alike their thought
+processes were.
+
+"We'd better approach from the back," Scotty suggested.
+
+Rick agreed. "Suppose we cross to the eastern shore, then walk up until
+we're in sight of the house. It's close to the northern tip, anyway."
+
+It was almost fully dark now, and no lights appeared in the houses south
+of them. As they watched, lights showed far up the beach where the fancy
+frogmen lived. But there were no other lights anywhere on the island.
+
+"Just two houses occupied," Rick said.
+
+"We'll probably have more neighbors during the week end," Scotty
+answered. "The people in the house south of us must have left, but they
+may be back. Come on."
+
+They made their way through the palm grove, watching fruit bats whirl
+against the darkening sky. There was a slight breeze, just enough to
+make the palms whisper. It reminded Rick of Hawaii.
+
+The eastern shore was rough. The reef was much closer here, and long
+swells that had come all the way across the Atlantic sounded like
+subdued thunder as they broke. It was dark now, and only the white of
+the breaking water could be seen.
+
+They walked up the eastern shore until the lights of the frogmen's house
+were directly opposite, then turned toward it, moving with caution.
+
+"Take it easy," Rick whispered. "They may be outside."
+
+As they drew closer they could see that the lights were in the front
+rooms of the house. The back was dark, except for light that came
+through open inner doors.
+
+"Wait." Scotty whispered. "I'll see if they're out front."
+
+Rick sat down to wait as Scotty vanished. Few could equal his pal when
+it came to moving silently and invisibly.
+
+In a surprisingly short time Scotty reappeared. "No one out front," he
+reported. "They're all in the living room."
+
+Rick rose, and together they walked swiftly and silently to the rear of
+the house. The door of the room in which the diving gear was stowed
+opened into the living room. Perhaps they could see in there.
+
+A card game was in progress by the light of a kerosene lamp. Rick
+studied the face of a heavy-set, dark-haired man who sat facing him. The
+man wore a T shirt that displayed the heavy muscles of arms and chest.
+His face was square-jawed and powerful, the eyes set deep under bushy
+eyebrows. His hair was short and curly, sprinkled with gray. He looked
+like one used to command. Rick's quick imagination pictured him on the
+quarterdeck of a slaver, ruling his cutthroat crew with iron fists.
+
+The others were not visible through the door. The boys moved silently to
+the side of the house and drew back so they could look through the
+living-room window. The second man was visible now. He was young,
+perhaps in his twenties, and he had an unruly shock of blond hair. Once
+he might have been good-looking, but a scar crossed a nose that had been
+badly broken.
+
+The third man sat with his back to them. Rick touched Scotty's sleeve
+and they went around the house via the back. The view was blocked by an
+open door.
+
+Scotty put his lips close to Rick's ear. "The front."
+
+Rick led the way, moving carefully because light spilled out of the
+front windows and the open front door. They reached a vantage point and
+looked in. The third man was clearly visible. The boys reached for each
+other at the same moment.
+
+The third man was Steve's shadow!
+
+ * * * * *
+
+Morning found the _Water Witch_ anchored on the reef close to the place
+where the boys had found the bar shot. There was no sign of activity at
+the fancy frogmen's house, and the boat was tied up as it had been the
+previous evening. Apparently they were late sleepers.
+
+The Spindrifters tossed coins to see who would make the first dive, and
+the lot fell to Rick and Tony. They donned their equipment, then Rick
+picked up a spear gun while Tony selected a wrecking bar from his
+equipment.
+
+It took ten minutes of their precious fifteen to find the wreck again.
+This time, Rick took the precaution of tying a float to a projection and
+unwinding line while the float rose to the surface.
+
+Tony started at one end of the mass of marine growth and inserted his
+wrecking bar. Rick joined him in heaving, and a cloud of dust and fish
+eggs rose to envelop them. It took a moment or two for the water to
+clear enough so they could see, then Tony hooted his triumph. The pull
+had exposed rotted timbers. This had to be a ship! But was it the
+_Maiden Hand_?
+
+Rick wondered if they would ever be sure. Yet, he felt that it was, even
+though he realized that the feeling grew as much out of optimism and
+hope as anything else. Still, it was unlikely that another ship would be
+wrecked at this same depth.
+
+Tony wrote on his slate, "Mor undr sand thn can see, likely."
+
+Rick nodded. The shifting sands had undoubtedly covered, exposed, and
+recovered the wreck dozens of times in the years it had lain here. He
+looked at his watch, then reluctantly gave Tony the signal to surface.
+Their time was up.
+
+On the _Water Witch_, Tony said, "It's a ship all right. And since its
+on the western reef at twenty fathoms, I'd say that it's very likely the
+one we want."
+
+"Wonder how Captain Campion pegged the depth so accurately?" Scotty
+inquired.
+
+Zircon had a possible answer. "Let's assume the pirates knew he was
+carrying the golden statue. It would have been logical for them to
+sound, just to see if there was any possibility of recovering the
+treasure from the wreck. Since they kept Campion for ransom, he would
+have heard the depth mentioned."
+
+It seemed reasonable, and it was as good an answer as any, since there
+was no hope of knowing whether it was right or wrong.
+
+"How do we find the statue?" Rick asked.
+
+Tony handed him the wrecking bar with a grin. "Take the wreck apart a
+piece at a time. And if you still haven't found it, start digging."
+
+The boys sighed. Rick recalled reading somewhere that treasure hunting
+was synonymous with ditch digging. Now he knew what the author meant.
+
+Scotty and Zircon prepared to dive, shifting the regulators to fresh
+tanks. While they checked equipment, Rick rummaged through the boat's
+locker and found a length of heavy line. An empty water jug with a screw
+cap was attached to it, and he handed the end of the line to Scotty to
+take down with him.
+
+"The fishing float and line isn't heavy enough. Let's add this, just in
+case."
+
+Scotty took it and went over the side. He carried his spear gun while
+Zircon took the wrecking bar. Rick watched as they vanished from sight,
+leaving only the continuing track of bubbles.
+
+Ashore, a man came out of the fancy frogmen's house and walked down to
+the beach. He shaded his eyes and stared at the _Water Witch_. Rick
+pointed him out to Tony.
+
+"This business stumps me," the archaeologist admitted. "Are you certain
+about the identity of the man who was trailing Ames?"
+
+"We're dead sure."
+
+"Then is there any possible way he could have known about our presence
+on the island?"
+
+"Not unless he recognized the _Water Witch_."
+
+"That must be it. The question is, what do we do about it?"
+
+"Nothing, I guess. Except to be on our guard."
+
+Twin sets of bubbles rose, some distance from the boat, showing that
+both lungs were working well twenty fathoms down. Since the bubbles did
+not ascend vertically, they did not show the location of the two on the
+bottom. Rick studied them, working on an idea.
+
+The chicken had dropped pretty close to them. But since their floats
+were tied to the reef, and their bubbles were carried off a vertical
+path by the light currents, neither could have been used to pinpoint
+their whereabouts--_unless whoever dropped the chicken had an excellent
+knowledge of the currents in this particular place_!
+
+He carried the thought further. The shadow had gotten upset because he
+and Scotty had gone swimming in an area where something was hidden. At
+least, that was a reasonable assumption, based on the events at St.
+Thomas. The fancy diving gear in the house, the attempt to warn them
+off, and the presence of Steve's erstwhile shadow on Clipper Cay could
+then be added up.
+
+Right here, in this particular area, another mysterious something was
+hidden! Something that the fancy frogmen dived often to see, use,
+collect, or whatever they did with it. That would account for their
+familiarity with the currents!
+
+He started to tell Tony, then reconsidered. It was a pretty good
+hypothesis, he thought, but not supported by ironclad evidence. If he
+told the scientists, they might forbid any more diving in the area. And
+he was determined to get that treasure--more for his sister Barby than
+for himself. If he failed to get it there would be no living with Barby,
+since she would always maintain _she_ could have found it if they had
+only allowed her to go on their old expedition.
+
+Zircon and Scotty broke water and Rick helped them aboard.
+
+"It's a ship, and a sailing ship at that," Zircon boomed. "We identified
+what was almost certainly a compass binnacle, probably brass, but there
+wasn't time to get it free and bring it up. Scotty found what is
+probably the muzzle of a cannon, buried in the sand."
+
+"There's so much growth over everything that it's hard to tell what's
+what," Scotty added. "But it certainly looked like a cannon muzzle."
+
+"From what we saw, I suspect that the portion above the sand is the
+stern, probably the stern super-structure. If the timbers haven't
+completely rotted away, ripping off the top should expose the stern
+cabins."
+
+"That seems reasonable," Tony agreed. "At any rate, it's a good basis
+for operation. Rick, if you'll look in my kit, you will find a larger
+bar you can borrow. You'll both need tools if you're going to take the
+ship apart."
+
+"Anyway, that's enough diving for the morning," Zircon said. "Let's up
+anchor and go."
+
+While the others got the boat underway, Rick started the compressor in
+the cockpit and connected up the tanks they had used. He almost wished
+he and Scotty had been extravagant and had ordered triple tank blocks to
+give them maximum time under water. Still, the singles were convenient,
+and diving was a sport it wasn't wise to overdo. By the time they were
+through with lunch and had rested awhile, the tanks would be fully
+charged again.
+
+As they tied up, Zircon said, "Tony and I will work at his midden this
+afternoon. You two take the boat. We won't need it. I'll walk over and
+take a look every once in a while, and if we see our friends from the
+cottage near you, we'll come running."
+
+The boys helped Tony prepare a simple lunch of soup and sandwiches, then
+all hands retired to the front porch to eat.
+
+Up the beach, there were signs of activity around the frogmen's boat. As
+they ate and watched, the boat moved away from the pier and approached
+the reef, where it anchored. Rick went to get the binoculars and focused
+them on the scene.
+
+Two frogmen, complete with suits, went over the side right where their
+buoys floated!
+
+"They're diving at the wreck!" he exclaimed.
+
+Zircon took the glasses and watched, then handed them to Tony.
+
+The archaeologist muttered, "Surely they can't be interested in the
+treasure. It would be simply too much coincidence for them even to know
+about it."
+
+"Maybe they're just looking to see what interested us," Scotty offered,
+and his explanation seemed the most plausible.
+
+The group watched until the frogmen surfaced and the boat went back to
+its pier.
+
+"Scotty has it," Zircon agreed. "From what we've seen, I'd say they
+simply followed our buoy lines down to see what we had been doing."
+
+"If that's the extent of their interest, I don't see how we could
+object," Tony said. "Or even if they tried for the treasure we'd have no
+grounds for objecting. The ship is anyone's property after all these
+years."
+
+Rick said flatly, "We won't do any objecting, but we'll do plenty of
+watching. We're going to get that treasure if it's there, whether the
+fancy frogmen like it or not!"
+
+
+
+
+CHAPTER X
+
+The Wailing Octopus
+
+
+As Rick steered the _Water Witch_ to its anchorage above the reef, he
+told Scotty about the theory he had developed that morning.
+
+He concluded, "Their going out to take a look where we were diving is
+another piece of evidence. Unless they were afraid that we might be
+interested in their stuff--whatever and wherever it is--why would they
+be so concerned about what we're doing?"
+
+"It makes a lot of sense," Scotty agreed soberly. He looked at Rick with
+a sudden twinkle. "It might be a good idea to take a look around down
+below--just so we'll know what to stay away from, of course."
+
+Rick grinned.
+
+By the time they dropped anchor, Scotty had the diving gear rigged and
+it was only the work of minutes to get into the water. Each carried a
+spear gun in one hand and a wrecking bar in the other. Ordinarily they
+would not have bothered with the guns, but being armed seemed just
+common sense.
+
+On the bottom, Rick scouted around the wreck, looking for signs of its
+former structure while Scotty attacked the stern with a crowbar. Under
+Scotty's prying, a timber suddenly gave with an audible crack, and a
+huge grouper that must have weighed nearly three hundred pounds rushed
+past Rick, startling him half to death until he saw what it was.
+
+Scotty hooted in derision as Rick back-pedaled, then he put his bar down
+and swam to Rick's side. He scrawled on his belt slate, "Whre he cm
+frm?"
+
+Rick shrugged. It was a good question. They swam slowly around, looking
+for the grouper's hiding place and failed to locate it. Rick knew the
+big fish liked caves, rocky clefts, and the interiors of wrecks. This
+one must have a hole somewhere.
+
+He tried again, going right down to the bottom and crawling along with
+stomach touching the sand. Even so, he might have missed the hole if
+stirred-up dust from the fish's sudden departure hadn't indicated where
+it was. The hole, big enough for him to crawl through, was _under_ the
+wreck, hidden by rotted planks covered with marine growth. He hooted for
+Scotty's attention and showed it to him.
+
+He took his belt slate and wrote, "Way into shp?"
+
+Scotty nodded and wrote in his turn, "Too drk. Need lites."
+
+Rick nodded. For a moment he was tempted to try ripping off the planks
+with his bar, but he decided against it. Any disturbance might very well
+collapse the entire structure. He wondered whether the hole was just a
+shallow opening, or whether it actually led into the ship. No matter.
+They had watertight flashlights with their spare gear in the boat. They
+could find out on the next dive.
+
+For their remaining time underwater he joined Scotty in his assault on
+the stern of the ship. They were rewarded by finding what was evidently
+the interior of a cabin. Rick ripped off another plank, then jumped as
+Scotty hooted four times for danger. The cabin was the home of a fairly
+large moray eel! Both boys dropped their bars and grabbed for their
+spear guns, but Scotty held up his hand in a sign to wait. Rick did so,
+and saw the big eel emerge and swim rapidly toward the reef.
+
+Scotty had shown wisdom. The moray is hard to kill, and this one would
+have given them a battle that might have used up more air than they
+could spare.
+
+The water inside the cabin was murky. Rick looked at his watch. They had
+only a few minutes left. He wrote on his slate, "Sty dwn til rsrve
+wrning."
+
+Scotty nodded agreement.
+
+They watched as the water settled and the interior of the cabin grew
+clearer. Evidently it had been a very small cabin. There was a rotted
+frame that might once have been a single bunk, and a few broken, almost
+disintegrated boards that might have been a table. Mattress and bedding
+had long since vanished. Then Rick spotted a squarish shape under the
+ruin of the bunk and motioned to Scotty. They went in after it.
+
+The top crumbled under their touch and silt rose into the water around
+them. But Rick persisted and felt fabric under his hands. He pulled it
+out and recognized a seaman's jacket, brass buttons corroded and fabric
+nearly rotted through. Apparently they had found a sea chest, but their
+exploring hands discovered nothing but rotted fabrics.
+
+Rick felt the warning constriction that told him he had only minutes
+left. He pulled down the reserve lever of his tank and touched Scotty's
+arm. He hooted twice for the ascent.
+
+Back in the _Water Witch_, they connected their tanks to the compressor,
+put the regulators on charged tanks, then tested their underwater
+flashlights.
+
+Rick said, "Do you realize I haven't taken a single picture?"
+
+"Why not take some on the next dive?"
+
+"Good idea." Rick went into the cabin and brought out his camera.
+
+The camera was the same one he had adapted for night movies, during
+their adventure known as _Smugglers' Reef_. He had built an underwater
+case for it from stainless steel and Lucite. An intricate gear
+arrangement allowed him to focus or change aperture underwater, and a
+light meter in the rear of the case told him what setting to use. There
+was an ordinary inner-tube valve projecting from one side by which the
+case could be charged with compressed air to compensate for the pressure
+of the water. The unit was battery-powered and had a bracket for
+mounting the infrared light used for night photography.
+
+He unscrewed the front of the case and took the camera from its mount.
+He hesitated. "Suppose there's enough light down there for color film?"
+
+"There might be," Scotty replied, "but you wouldn't gain much by using
+color. Everything would photograph in shades of green. Might as well
+have it in shades of gray."
+
+"You've got a point." Rick loaded the camera with fast black-and-white
+film and returned it to the case. Then he replaced the cover and
+disconnected the compressor long enough to pump pressure into the camera
+case. "Ready to go," he announced.
+
+"Take it easy," Scotty said. "We'd better rest a half hour or so. If we
+don't knock ourselves out, we can get in three more dives today."
+
+Rick knew the wisdom of that. He adjusted the camera and took a series
+of "establishing" shots, to establish that the movie had been taken on a
+boat near an island. Then, when the time came to dive, he photographed
+Scotty entering the water. At his direction, Scotty got out again, while
+Rick got in, swam down a few feet, and took a shot of Scotty entering
+from that angle. Then the camera followed as Scotty flippered smoothly
+down into the deep water.
+
+Rick followed, camera extended in front of him, sighting through the
+gun-type sights mounted on top of the case. There was a handgrip on each
+side, with the controls handy to his fingers. By watching the light
+meter he could change his exposure as the shifting light required.
+
+He moved ahead of Scotty, panned across the wreck, then reversed the
+camera to photograph Scotty approaching. On a hunch, he stood well back
+when Scotty approached the underwater entrance and got a picture that
+was priceless! The grouper had returned to his home, and frightened by
+the light that suddenly probed his hide-out, he flashed out and caught
+Scotty by surprise. Scotty dropped his flashlight and back-pedaled
+frantically. Grinning, Rick kept his camera grinding. Scotty turned and
+saw that Rick was shooting, and held both hands to his face in mock
+dismay. Rick cut and secured the camera to an outcropping with its
+safety line.
+
+Scotty picked up his light and crawled slowly into the opening. Rick
+waited, watching anxiously to be sure his friend's hoses and regulator
+cleared the entrance. Then Scotty vanished inside. In a moment he
+reappeared, headfirst, and beckoned.
+
+Rick followed him in, his own flashlight extended. It was a little murky
+from the grouper's hurried departure, but he saw instantly that they
+were in what had been for those days a large cabin. This must have been
+the skipper's quarters. His light picked out the remains of furniture,
+including one massive chair that was still in good condition.
+
+Scotty gestured with his light and Rick saw an oaken door. He swam over
+to it and inspected it closely. It was still firm, still in place. Where
+did it lead?
+
+There was only one way to find out. He took hold of the old-fashioned
+handle and pulled. The door didn't budge. Rick tried again and failed.
+He swung himself around and put both feet on the wall next to the door,
+then applied leverage.
+
+The handle came completely off. Rick sailed backward across the cabin
+and his tank rang like a bell as it struck something metallic. Scotty
+hurried to his side, and Rick gestured that he was all right. They
+turned to inspect the object against which Rick had hurtled and found
+that it was the still-sound strap for a beam, probably made of wrought
+iron.
+
+Rick took his belt slate and wrote, "Whre wld he hide it?"
+
+Scotty read it with his light, then shrugged. They began a methodical
+inspection of the cabin, surprised that it was so clear of marine life.
+Rick surmised that the opening had developed only recently, perhaps from
+the shifting of the ship. They found a closet and a heap of what had
+once been clothes on its floor. Then Scotty made the big discovery of
+the day. He reached into a shelf space above the bunk, hand exploring,
+and touched something hard. He drew it out. It looked like a
+green-covered bundle about a foot long and two inches thick. But before
+he had a chance to inspect it further, his air gave out and both boys
+hurried to the surface on their reserves.
+
+Aboard the _Water Witch_ they shed their equipment and sat down to
+inspect Scotty's find. The covering proved to be layer after layer of
+oilcloth, wrapped around the object. The outer layers had deteriorated
+somewhat, but the inner ones were intact.
+
+Scotty finished unwrapping and found a second wrapping of still-dry
+linen. He pulled the linen off, and both boys gasped. It was a jeweled
+dagger, with a good-sized ruby winking in its hilt!
+
+"Take it out of the sheath," Rick suggested.
+
+Scotty did so, and disclosed a blade covered with some hard brown
+substance. "That's not rust. Got a jackknife?"
+
+Rick found one and handed it to him. Scotty scraped and was rewarded by
+the gleam of bright metal.
+
+"It must have been coated with heavy grease," Rick remarked. "During the
+years, the grease hardened into a permanent rustproof coating. Wait
+until the scientists see this!"
+
+Scotty grinned his pleasure. "This is one treasure the log didn't
+mention. Poor Captain Campion must have thought a lot of it to protect
+it so thoroughly."
+
+"He might have been taking it to the New World as a gift for some
+influential friend," Rick ventured. "It looks like Spanish work."
+
+Scotty looked at Rick speculatively. "Are you making a claim on this?"
+
+Rick knitted his brows. What was Scotty driving at? "You found it," he
+said. "Technically, we're supposed to share and share alike, the four of
+us and Barby. But how do you split a dagger? And we wouldn't sell it,
+anyway. It's too nice a souvenir."
+
+"I'll ask Tony and Zircon," Scotty said, "but if none of you have any
+objection, I would like to claim it, because I want to give it to Dad
+for a birthday present next month."
+
+Rick punched him on the arm. "You'll get no objection from me. Or from
+Tony and Zircon either."
+
+"I can buy presents for the family," Scotty said slowly. "I do, on
+birthdays and Christmas. But I've always wanted to give Dad something
+really special, something to tell him how I feel about being taken into
+the family."
+
+Rick nodded. He knew how Scotty felt, and he liked him all the better
+for it. "Let's get ready for the next dive," he said abruptly.
+
+They went through the necessary checks on their equipment, transferring
+the regulators to the third set of tanks. Rick decided to leave the
+camera on the boat this time. He was anxious to inspect the ship
+thoroughly, and photography took time.
+
+After a half hour of rest the boys went back into the water again,
+carrying their wrecking bars and spear guns, flashlights on their belts.
+
+An inch-by-inch inspection of the cabin disclosed no more treasures, but
+Rick found a plate, still intact. He wondered if it were the plate from
+which the captain had last dined before the pirate attack, and put it
+outside the entrance to be carried to the surface.
+
+Once satisfied that the cabin held no secrets, the boys attacked the
+door. It was hard work, and they raised so much dust that their light
+beams were almost useless. However, they struggled on until the door
+finally gave, only to admit quantities of sand.
+
+Rick guessed that the door had opened onto a deck that was now buried
+far under the sand. They went outside to allow the murkiness to settle
+in the cabin, and Rick consulted his watch. Their time was nearly up. He
+hooted to Scotty and they surfaced.
+
+The first tanks they had used were ready now. They shifted the
+regulators and hooked up another pair to the compressor.
+
+"I'm afraid Tony was right," Rick said. "We'll have to take the ship
+apart piece by piece."
+
+Scotty examined his foot where the fin was rubbing a little. "What would
+be a logical hiding place? If I were the captain, I'd probably hide the
+statue under false flooring or something. Anyway, I'd hide it aft, in
+officer's country, and not near the forecastle where the crew lived."
+
+"That's probably right. Anyway, we won't have time to do much wrecking
+today. What say we hunt for loose boards in the cabin?"
+
+Scotty grinned. "The treasure fever has got our boy Rick. Have you
+forgotten we were going to see what those fancy frogmen were curious
+about?"
+
+Rick grinned back, a little sheepishly. "You're right. I had forgotten.
+Well, we can spend half the time looking for the treasure and the other
+half looking for the frogmen's cache."
+
+The search for the treasure disclosed no loose boards, or anything
+resembling a secret hiding place. At the end of ten minutes they turned
+from the wreck and swam along the bottom toward the reef.
+
+Since they had no idea what they were looking for, the search couldn't
+be a very carefully planned one. Rick led the way, following the reef,
+taking time to examine the coral formations. There were countless sea
+urchins, and enough small fish to feed the entire population. Bigger
+fish, however, were not plentiful. Once Rick saw a snook that would have
+been worth taking, but the fish sped off into the watery gloom. Again,
+Scotty called his attention to a deadly scorpion fish. This small,
+rather weird-looking little creature had a dangerous defense mechanism
+in the spines of his back. His poison bore a strong resemblance to cobra
+venom. The boys gave him a wide berth.
+
+Now and then a moray glared at them with unwinking eyes from a crevice,
+but the boys paid no attention. The morays wouldn't attack unless
+disturbed, and there was no reason for disturbing them. Rick wondered if
+the big one they had ousted from the wreck had found a new home.
+
+They passed a colony of sea worms, colorful even in the green light. The
+worms were pretty, but their long hairs could give a painful sting.
+
+Their time was growing short. Rick consulted his watch, then his depth
+gauge. They were at eighty-five feet. Because of the shallower water
+they would have a little more time, perhaps another five minutes before
+constricted breathing told them only a few minutes of air remained.
+
+Scotty found a puffer and waved at him, but the fish paid no attention.
+Scotty motioned to Rick, then reached out and scratched the creature's
+stomach. It began to gulp water until it resembled a balloon. They left
+it to return to normal in its own time. On the surface, the puffer would
+have gulped air in the same way. They had caught them on lines many
+times.
+
+They were past the _Water Witch_ now, Rick estimated. He hooted at
+Scotty, then led the way up to a depth of about forty feet. There he
+started back along the cliff.
+
+Suddenly he wished he had brought a game bag attached to his belt. The
+reef here was alive with shellfish. He identified cowries, whelks, and
+some excellent specimens of Triton's horn. They would have to come back
+again, to collect some to take home. The biggest problem was getting the
+animals out of their shells, unless there were some anthills on the
+island. Ants would do the job neatly in a few days.
+
+Scotty hooted, and pointed. Directly ahead was a small shelf. Rick moved
+to Scotty's side and saw the dark opening of a cave. Next to the opening
+was a small octopus. As they approached he changed color, trying to
+imitate the multicolored coral against which he rested.
+
+Rick reached out a hand and the animal retreated, sliding into the mouth
+of the cave. Apparently this was his home, because the ledge was
+littered with shells from a number of meals.
+
+Now Rick wished for his camera, then smiled inwardly. To satisfy all his
+unexpected wishes he would need a sort of underwater trailer to tow his
+gear.
+
+Scotty moved close to the octopus and it retreated still further. Both
+boys knew the creatures were harmless to divers, and some divers even
+handled them. But there were reports of divers being bitten while
+playing with octopuses, and they had learned long ago that unnecessary
+risks were foolish.
+
+Rick suddenly rocked back as his ears were smitten by sound. A wail
+echoed in his head, so intense that it almost hurt. Scotty started, too,
+and reached for the ledge in his astonishment.
+
+The octopus peered out of the cave, and the wail came again, buzzing
+uncomfortably in their heads. And in that moment, Rick's air gave out.
+He pulled the reserve lever and planed to the surface, Scotty close on
+his heels.
+
+On the _Water Witch_ they stared at each other.
+
+"Did you hear that?" Scotty demanded.
+
+"I'll say I did!"
+
+"That octopus wailed," Scotty insisted. "Twice!" He hesitated, then put
+Rick's thoughts into words. "Only--octopuses don't wail. They don't make
+noise of any kind."
+
+"This one did," Rick said. "A wailing octopus! This is either a new
+scientific find, or ..."
+
+"Or we've found what the fancy frogmen didn't want us to find," Scotty
+concluded.
+
+
+
+
+CHAPTER XI
+
+Lights on Clipper Reef
+
+
+"This," Hobart Zircon boomed, "is a phenomenon that will rock the
+science of zoology to its very depths! We will examine this creature and
+determine his genus and species, and we will name him after you two.
+_Octopus waili branti-scotti._ Or perhaps _Octopus screami_ would be
+better."
+
+"Of course we're not certain that it was a wail," Rick said soberly. "He
+might have been singing. He might even have been telling us to go catch
+him a fish."
+
+Tony Briotti observed, "This may not be an isolated phenomenon. Who
+knows? A search may disclose screaming squid, or simpering sharks, or
+burbling barracuda."
+
+"Seriously," Zircon asked, "have either of you a theory to account for
+this? Or do you really believe that the octopus wailed?"
+
+"We'd be in a better position to answer that if we'd had a chance to
+explore the cave," Scotty replied. "How can we tell? Maybe the octopus
+really did wail, and we were the lucky ones who heard the sound for the
+first time." He grinned. "We should have wailed back and tried to strike
+up a conversation."
+
+Rick agreed. "I'm with Scotty. We just don't know. I agree that a
+wailing octopus is a new kind of beast, but that's not entirely
+impossible, is it?"
+
+"Perhaps not." Tony stared at the sunset. "I'm trying to recall the
+physiology of _Octopus vulgaris_, as the garden variety of octopus is
+called, but my memory isn't working. It isn't beyond reason. After all,
+some fish make sounds. I've caught croakers myself that were pretty
+noisy. But I've never heard of octopus sounds until now."
+
+Scotty chuckled. "Haven't I read that octopuses have some intelligence?
+We might teach him to sing. He'd be a natural for television."
+
+"You say that the sound was loud?" Tony asked.
+
+"Very loud. My head hurt. Did yours, Scotty?"
+
+"I'll say! For a minute I thought my brain cells were rubbing together."
+
+Zircon sighed. "I am stumped. And not only by your Wailing Willie,
+either. This whole affair baffles me, including the presence of Steve's
+former tail on this island. Hasn't it occurred to you that those fancy
+frogmen, as you call them, would have made some overt move by now if
+they were really interested in us?"
+
+"Dropping the chicken was an overt move," Rick pointed out.
+
+"Yes and no. I'd prefer to call it a not-too-subtle warning. Yet they
+haven't tried to interfere with your diving around the wreck."
+
+"I've wondered about that," Scotty offered, "and it seems to me they've
+satisfied themselves that our interest is just in the wreck, and not in
+whatever they have hidden underwater. If they have anything hidden, I
+mean. As long as we stick with the wreck, they have no reason for
+causing trouble."
+
+Tony agreed. "That makes sense to me. Perhaps you can answer this: Why
+do they wear cold-water suits? It's appreciably cooler at twenty
+fathoms, but it's certainly not cold enough for a suit."
+
+"We only stay down fifteen minutes," Scotty said. "If we stayed down
+longer we might get chilled. The water isn't warm by any means down by
+the wreck."
+
+Rick had a thought. "We're used to cold water, remember? Diving off
+Spindrift would chill a polar bear, even in summer. Suppose these people
+had done all their diving in tropic waters? This water would seem cold
+to them, particularly down deep."
+
+It was nearly dark now, only a glimmer of light in the west. The four
+sat on the front porch of the cottage.
+
+Zircon asked, "Did you monitor the radio tonight, Rick?"
+
+"Yes, but there was no word from Steve."
+
+"Don't you think he might like to know about the presence of his shadow
+on Clipper Cay?" Tony inquired.
+
+Rick pointed to the Sky Wagon resting on the beach. "Trouble is, that's
+our only communication. I could contact the St. Thomas airport and
+request that they pass a message, but that would be like broadcasting it
+to the world. Steve might not like it."
+
+Zircon's deep voice cut into his comment. "Look! Our friends are
+apparently going to do some night work."
+
+There were lights on the frogmen's boat, and it was putting out. As the
+Spindrifters watched, it slowly approached the reef, then stopped.
+Scotty got the glasses and examined the scene. "Something's up!" he
+exclaimed. "I saw a diver go over the side!"
+
+Hobart Zircon coughed self-consciously. "Do you know, I have taken a
+certain amount of pride in the fact that I am by nature a conservative
+individual with a highly developed capacity for minding my own
+business."
+
+Rick wondered what on earth the big scientist was getting at.
+
+"The pursuit of truth has led me along many devious routes," Zircon
+continued. "I have tried, with some success and many failures, to plumb
+the mysteries of Nature. But while I have tried to make the business of
+our natural universe my own, I have never thrust my not-inconsiderable
+nose into the business of neighbors. However, this admirable reticence
+has limits, since, as a scientist, I am also possessed of that inherent
+trait of curiosity without which no person can succeed in science."
+
+Rick exploded into laughter. "And what you're leading up to is, you want
+to go see what those people are doing!"
+
+"Precisely," Zircon admitted.
+
+Tony and the boys roared with laughter.
+
+"Hobart," Tony said with a chuckle, "you never fail to astonish me. And
+how do you propose to stick your not-inconsiderable nose into the
+business now going on over there?"
+
+Zircon waved his hand. "The method was developed by our young Mr. Brant,
+who sometimes shows slight sparks of intelligence. He has a device which
+projects infrared light, and glasses that allow the wearer to see
+whatever that light illuminates."
+
+Rick stared. Zircon was proposing that they take his underwater camera
+and use it for illumination. That must mean ... "You want to swim over
+with the lungs?" he asked incredulously.
+
+"And why not?"
+
+"But we've never done any night diving!"
+
+"You tested the camera at night, did you not?"
+
+"Yes," Rick admitted, "but that was in water that we knew, off Pirate's
+Field at home. And we only stayed in long enough to expose a few feet of
+film."
+
+"We know enough about these waters to know that there are no dangerous
+obstructions beyond the reef, at least between here and the _Maiden
+Hand_."
+
+Scotty laughed. "This is a day I never thought would come. It's usually
+the other way around, with Rick trying to sell some idea that everyone
+else opposes. Why not swim at night, Rick?"
+
+"No reason," Rick admitted. "It was just that it hadn't occurred to me.
+There's one difficulty, though. I have only two pairs of glasses with
+infrared-sensitive lenses. So only two of us could go."
+
+"Only two could dive with the camera," Tony corrected. "But all of us
+could go. Two would remain on the surface, with the floats, in case of
+trouble."
+
+"Who would dive and who would stay on the surface?" Scotty demanded.
+
+Rick produced a quarter. "Let coins decide. Except for the professor. He
+thought of it, so he dives."
+
+"Fair enough," Scotty agreed. "All right with you, Tony?"
+
+"Of course. The three of us, then. Odd man goes with Hobart."
+
+Tony and Scotty produced coins. With Rick, they walked into the living
+room and lighted a kerosene lamp.
+
+"Now," Rick said, and tossed his coin, catching it in the palm of his
+hand and slapping it onto his other wrist. Tony and Scotty followed
+suit. Rick uncovered first. He had heads. Tony uncovered and displayed a
+tail.
+
+Scotty groaned. "Shucks! I lose. It's one of you."
+
+Rick held his breath as Scotty uncovered--another tail! He turned to
+Zircon. "We dive, while Scotty and Tony stay topside."
+
+"Good. Well, what are we waiting for?"
+
+They changed quickly into trunks, then assembled their diving gear. Rick
+took the front plate from his camera and put the infrared searchlight on
+its mounting bracket. He changed to a fresh battery, then replaced the
+film in the camera with the special infrared-sensitive film.
+
+Whatever the infrared illuminated could be seen through special glass.
+Rick had ordered lenses ground from the glass and had placed them in
+frames made to fit into a face mask. These frames could be purchased at
+any diving-equipment supply house. They had been designed for divers who
+had to wear their own corrective glasses, and they suited Rick's purpose
+to perfection. He handed a pair to Hobart Zircon, then inserted the
+other pair in his own mask.
+
+Zircon, Tony, and Scotty decided to take spear guns. Zircon chose Rick's
+rubber-powered gun, while Tony selected the light spring gun. Scotty
+chose the highest-powered gun they had, a new jet-type powered with
+carbon dioxide.
+
+Rick and Zircon connected their regulators to two freshly filled tanks,
+then tested the equipment. Zircon tied a rope to his belt.
+
+The big scientist drew them together for a brief conference.
+
+"We'll swim out and cross the reef," he directed. "Then we'll swim along
+the reef, staying as close as possible to the breakers. They will help
+conceal us. When we approach the boat, Tony and Scotty will stop and
+hold position. Scotty, are the binoculars waterproof?"
+
+"Yes, they are."
+
+"Then take them. Rick and I will go directly to the bottom at the base
+of the reef. We will then proceed along the reef until we spot our
+friends yonder."
+
+Rick had an unhappy thought. "Suppose they see us?"
+
+"We will try to prevent them from seeing us. However, if they do, I
+suggest a retreat in as good order as we can manage. If they should
+catch up with us, we will bluster and bluff our way on the basis that we
+were only diving to see if they were trying to search our wreck."
+
+Scotty laughed. "Turn their own table on them. That's very good,
+Professor."
+
+"I'm glad I'm not a physicist," Tony said piously. "We archaeologists
+aren't half so devious."
+
+"I am acting in my capacity as a former consultant to JANIG, and not as
+a physicist," Zircon retorted with dignity. "You will refrain from
+casting aspersions on my profession, Doctor Briotti."
+
+"My apologies," Tony said, grinning. "In other words, the man is
+devious, but the scientist is not."
+
+"Exactly. Well, shall we go?"
+
+Rick was glad to get into the water. The camera in its underwater case
+was heavy in air, but weighed only a few ounces in water. He swam with
+face mask under, breathing through his snorkel and letting the camera
+hang.
+
+They crossed the reef without difficulty, then turned to swim along it.
+The trough just seaward of the breaking point of the waves was the most
+comfortable swimming position and they went in single file, Zircon
+leading.
+
+Every now and then Rick looked up. They were getting near the boat, he
+thought. Perilously near. The boat was anchored just inside the reef,
+and he could see activity on its deck. Apparently the frogmen had
+returned from their first dive and were changing tanks.
+
+Zircon stopped swimming and lay motionless in the water. Rick drew
+abreast of the big scientist, and Tony and Scotty stopped behind them.
+As they watched, suited figures with belt lights and back tanks climbed
+down a ladder into the water. A third man, on deck, lowered something to
+them. It was hard to see, but Rick thought it had a golden glisten and
+that it was round, about the size of a basketball. The frogmen took it
+and went under.
+
+[Illustration: _A third man lowered something that glistened like gold_]
+
+Zircon's big hand took Rick by the shoulder, then he turned and motioned
+to the others that they were going under. Rick shifted from snorkel to
+aqualung mouthpiece. He took the end of rope that Zircon held out and
+snapped it to his weight belt. He and Zircon were now connected by a
+ten-foot length of rope, necessary to keep them from becoming separated
+in the darkness.
+
+He submerged and dove straight down into the blackness. His thumb
+compressed the button on the side of the case and the camera started,
+the infrared light turning on. A narrow cone of water extending out
+about twenty feet was illuminated, but the illumination was visible only
+through the special glasses he and Zircon wore.
+
+Rick held the button until they reached bottom, then suddenly realized
+he would use all his film before they had even found the frogmen. He
+groaned silently. Why hadn't he used his head? The light as well as the
+camera motor were operated by the same button. If he had only thought,
+it would have been a few seconds' work to change the circuit so the
+light would be on continuously. Or he might even be able to rig a
+waterproof switch that would operate just the light.
+
+Well, it was too late now. He jerked on the rope for Zircon to stop,
+then took his belt slate and wrote, "Cam on whn lite is. Wll use nw &
+thn." He held it in the beam of infrared light for Zircon to read. The
+scientist scribbled "OK" under the message, then gave him a gentle push
+as a signal to go ahead.
+
+Rick held his wrist in the beam and read ninety-two feet on his depth
+gauge. He calculated quickly. They would have enough air for about
+twenty-five minutes at this depth.
+
+He held the camera switch long enough to see that there was only smooth
+bottom ahead, then released it. Almost total blackness flooded in. For
+all practical purposes it was completely dark, no glimmer of light to
+mark their way.
+
+For an instant Rick felt panic, but reason reasserted itself. It was
+instinctive to feel fear under such circumstances, he thought. Not only
+was he out of his own medium, air, but in a high-pressure realm
+inhabited by potentially dangerous creatures. He grinned inwardly at the
+thought. The most dangerous creatures in this vicinity were human.
+
+A twinkle of light stopped him, but Zircon continued on and the
+connecting line tightened. Rick identified the twinkle as
+phosphorescence from some marine creature on the reef. There were many
+such in the ocean. He flashed the infrared light, saw that they were
+still heading properly, and cut it off again.
+
+The rope at his belt tugged four times for danger! He stopped instantly,
+letting go of the camera with one hand while he reached for his belt
+knife. Then he saw what Zircon had seen, a glow in the water ahead and
+above them. Rick estimated quickly the distance they had traveled. There
+was no doubt of it. The frogmen were at the octopus cave!
+
+He followed Zircon's lead, cutting the light off and on as necessary, as
+the big scientist moved ahead. The glow grew in intensity, but they were
+still too far away to see its exact position, or whether there were men
+around it.
+
+Rick's heart beat faster, and his breathing speeded up appreciably. In
+spite of Zircon's plan to claim they were only checking on the frogmen's
+interest in the wreck, Rick knew that being discovered would mean
+serious trouble. He recalled Steve's warning that they were up against a
+ruthless enemy.
+
+The question was, how close could they get without being seen? He could
+take pictures at ten feet, but at any greater distance the camera would
+be useless.
+
+Zircon moved ahead, going slowly now. Rick followed, not bothering with
+the dark-light unit because the glow in the water was enough for a
+beacon. Then the glow faded for a moment as a figure crossed in front of
+it. Still Zircon moved ahead until Rick could see two additional,
+smaller glows that he identified as the belt lights the frogmen had been
+wearing.
+
+Zircon continued on, still hugging the bottom, and Rick divined his
+intention. The big scientist was going to take them directly under the
+frogmen! It was logical, since the frogmen would not expect danger
+below.
+
+Rick followed, staying just behind Zircon's flippers, feeling the wash
+of water from his wake. The light was nearly overhead now, and Rick saw
+dark figures moving. It was unreal, like a Hollywood motion picture,
+except that the tense music of a movie production was replaced only by
+the soft sighing of their regulators.
+
+And with the thought, Rick almost lost his mouthpiece. Their bubbles!
+Their bubbles would rise right past the frogmen, a dead giveaway! It
+might already be too late, because Zircon was almost directly under the
+cave!
+
+
+
+
+CHAPTER XII
+
+Clouds Over Clipper Cay
+
+
+Rick jerked frantically on the tie rope, four times for danger, then he
+turned and swam rapidly back the way they had come. At first he felt
+resistance on the line, then Zircon hurried to catch up. Not until they
+were barely within seeing distance of the light did Rick stop, then he
+took his belt slate, started the camera for light, and wrote "Bubbles go
+by thm if we undr. They see."
+
+Zircon held a hand to his head in a sign of chagrin that he had
+forgotten, then he wrote, "Hw we gt clos?"
+
+Rick pondered the problem. The bubbles had alarmed him in another way,
+too. It was possible that the man on the boat could see four sets of
+bubbles rising where only two were supposed to be. Yet, he couldn't
+escape the feeling that it was important to get a look at what the
+frogmen were doing. There was no way out of it. He just had to take a
+chance.
+
+He wrote, "I mak pass hldng brth so no bbls, tak pix. U sty out of rnge
+& cvr me wth gn."
+
+Rick had just one hope of getting away with it. He had to assume that
+the frogmen would be busy with whatever they were doing in the cave. If
+so, their backs would be to the open sea. At least the chance was worth
+taking.
+
+Zircon wrote, "OK bt be crfl."
+
+Rick didn't need the warning. Together, they swam back until they were
+close to the glow of the lights. He hoped that the darkness and breaking
+surf above were concealing their bubbles. Finally Zircon halted. Rick
+unsnapped the line that held him to the scientist, squeezed Zircon's
+shoulder, and swam away from the reef toward the open water. He kept his
+head turned so he could keep the light in his field of vision.
+
+When he was out far enough he swam upward until he was on a level with
+the light, and directly out to sea from it. He inhaled, filling his
+lungs, then with camera outthrust, he drove directly toward the light.
+It wasn't hard to hold his breath--not with his heart acting as a
+stopper in his throat.
+
+The light grew clearer. He started the camera and kept moving with
+powerful strokes. Then he held his legs still and let inertia carry him
+in a silent glide. He had to get close--close!
+
+The light grew in intensity, and details grew clearer. He saw the
+frogmen, and their backs were to him! Between them, he caught a glimpse
+of something brassy and round, and he saw the octopus, clinging to the
+reef to one side of the cave.
+
+He held the camera button as long as he dared. Then when it seemed that
+he would glide right into the frogmen, he twisted sideways and bent
+backward like a circus acrobat, flippers moving in powerful thrusts. It
+was an excellent underwater imitation of a wingover, the plane maneuver
+that reversed direction by diving and turning. He planed downward until
+he touched bottom, then thrust himself with frantic kicks away from the
+vicinity of the cave.
+
+His lungs were about to burst, he felt, when finally he drew a deep
+breath. The gurgling sigh of his bubbles was sheer relief. He kept
+moving until he bumped headlong into Hobart Zircon. The scientist
+reached out and snapped his rope onto Rick's belt, then tugged twice.
+
+Zircon led the way along the reef bottom until they reached the spot
+where, they estimated, Tony and Scotty would be waiting. As they started
+for the surface, Rick switched on the camera and looked at his watch.
+
+They had been under only ten minutes! And he had been waiting for the
+warning constriction of air running out!
+
+Zircon broke water and instantly submerged again. He led the way a few
+feet under the surface to where he had seen Tony and Scotty, then led
+Rick to the top once more.
+
+Tony and Scotty saw them emerge and without a word turned and started
+back toward the cottage, pushing their floats. Instead of bothering with
+the snorkel, Rick kept the aqualung mouthpiece in place and swam a few
+feet under the surface, guiding himself by the wake of the others. He
+was tired--and relieved.
+
+The group crossed over the reef and swam to the beach in front of the
+cottage. There they gathered at the water's edge and stripped off their
+gear. For long moments no one spoke, then Zircon asked, "See anything,
+Rick?"
+
+"A little. Enough to get an answer, I think. We haven't discovered a new
+breed of octopus, because they were installing something in the cave.
+Something that makes a noise."
+
+"Do you know that, or do you infer it?" Tony asked.
+
+"I didn't hear the noise, if that's what you mean. But what else could
+it be?"
+
+"Too bad," Scotty said. "Now we won't have a new species named after us.
+Come on, give us the word. How was it?"
+
+Rick said, with complete truth, "I was scared to death."
+
+"And so was I," Zircon admitted. "At first the sensation of complete
+blackness caused an emotional reaction. Then I began to see that we had
+done a rather foolish thing. And I almost got us into trouble by
+forgetting that we send up a constant stream of bubbles." He told them
+of his plan to get under the cave, and of Rick's warning.
+
+"We thought of your bubbles," Scotty told them. "I talked it over with
+Tony, and came within an ace of diving after you, although I doubt that
+I could have reached bottom and found you. But we watched, and we
+couldn't see any bubbles at all. It was too dark, and we were right
+where the water was breaking."
+
+"My question is, did you get a picture?" Zircon wanted to know.
+
+"I'm sure I did. The camera was going, and it probably saw much more
+than I did--since cameras don't get scared. But it won't do us much good
+right now. We can't develop the film."
+
+The boys picked up the equipment and carried it to the _Water Witch_.
+Rick turned off the compressor. He was too tired to wait until all tanks
+were full. Time enough for that in the morning.
+
+When he and Scotty returned to the cottage, Tony greeted them with cups
+of hot chocolate and they sat on the porch and enjoyed them.
+
+"Let's sum up what we know," Zircon invited. "If anyone agrees that we
+know anything worth summing."
+
+"I think we do," Rick said, "and I think we ought to get it to Steve
+Ames. We don't know what he's after, or what kind of gang he's fighting,
+but we know one of them is here."
+
+"Yes, and we also know that Steve's agency is primarily concerned with
+protecting military secrets," Zircon added. "I agree with Rick. We must
+get word of these mysterious frogmen to him."
+
+"We discussed that earlier," Tony recalled. "In view of our discussion,
+it would seem that either Rick or Scotty or both must fly to Charlotte
+Amalie and tell him personally."
+
+Scotty pointed at the sky. "Have any of you looked up there?"
+
+All of them did. The moon was just rising, and there was enough light to
+see heavy cirrus moving high overhead.
+
+"There's a front of some kind moving down on us," Scotty said. "And did
+you notice the swells tonight? Long ones. I'm no first-class weather
+forecaster, but all the signs are there. We're in for a storm. The
+question is, how soon will it arrive?"
+
+"He's right," Zircon agreed. "I'm glad you're observant, Scotty.
+Frankly, I hadn't even bothered looking at the weather. I suppose I
+thought it would just continue to be perfect."
+
+Rick stared at the gathering clouds for long moments, then put into
+words the thing that had been bothering him.
+
+"You know, there has been a cloud over this vacation almost from the
+moment we landed at Charlotte Amalie. We didn't want to get involved in
+anything but diving and exploring, but we got pulled by the ears into a
+hot case. Steve warned us off that first day. The warning didn't help,
+because we got dragged back into things when we went swimming, and again
+at the hotel."
+
+Three faces were turned toward him, listening. He was expressing what
+all of them had been thinking, too.
+
+"We thought we'd leave trouble behind when we came here," Rick
+continued, "but it was waiting for us. We didn't look for it, until
+tonight."
+
+He drew a deep breath. "Well, from now on we have to become the hunters.
+Steve Ames doesn't know there's anything strange going on here. We do,
+and it's up to us to find out what. The goings-on in the octopus cave
+have something to do with the case Steve is working on--and what Steve
+is working on has something important to do with national security."
+
+He smiled grimly. "I know none of you will disagree with this, because
+it's the only thing we can do. Professor Zircon knew it tonight when he
+tried to excuse our looking in on the frogmen as curiosity."
+
+Zircon nodded silently.
+
+"From now on," Rick concluded, "we have to operate as unofficial JANIG
+agents, until we can get word to Steve Ames so he and his men can take
+over."
+
+
+
+
+CHAPTER XIII
+
+Message in the Storm
+
+
+The wind blew. It piled the surf high on the reef and blew the tops from
+waves between the reef and the shore. Hour by hour the wind stiffened,
+until the breakers on the shore were higher than those through which the
+Spindrifters had swum on the reef.
+
+The first hours of the morning were spent getting ready for a blow. The
+_Water Witch_ was secured by springlines, and extra fenders were put
+over her side. The four hauled the Sky Wagon high onto the beach by
+sheer muscle power, then turned the plane into the wind. Rick and Scotty
+salvaged the concrete-block foundation from the wreck of the cottage
+where they had found the planks, and used the blocks for land anchors on
+the plane.
+
+The shutters were checked, and closed on the front of the cottage. The
+shed where the tank had broken through was repaired as well as
+improvised tools and materials allowed, and all loose gear was stowed
+inside.
+
+The rain came. It drove with the wind into the front of the cottage in a
+continuous thunder. Its force carried it under the door, through cracks
+beside the window frames. The Spindrifters were forced to shred rags to
+stuff into cracks. In the kitchen the roof began to leak, and soon every
+available pot and pan was being used to catch drippings.
+
+Rick worked almost in silence, not joining in the bantering of his
+friends. As was his way, he worried the problem of the frogmen and their
+mysterious behavior the way his dog, Dismal, would worry a bone.
+
+He discarded a dozen possible reasons for their actions, including
+underwater communications, bombs, and an unusual way of fishing. He
+pondered on the relations of the Spindrift group--or lack of them--with
+the frogmen and re-examined their various theories.
+
+First premise: The frogmen, specifically Steve's former shadow, hadn't
+recognized them or the _Water Witch_.
+
+Second premise: The frogmen considered them harmless tourists,
+interested only in diving to the wreck, and therefore to be watched but
+not considered dangerous.
+
+He rather liked that one. It would mean that the chicken had been
+dropped "mischievously," to use Zircon's word, to try to scare them out
+of the immediate vicinity. But there were other possibilities.
+
+First premise: The frogmen knew of their connection with Steve.
+
+Second premise: The frogmen weren't worried about people with JANIG
+connections.
+
+This might be explained by superior weapons in the hands of the frogmen,
+coupled with the assumption that the Spindrifters had no communication
+with Steve. It might also be explained by knowledge of their real reason
+for being on Clipper Cay.
+
+Rick didn't care much for the last two premises. The first one seemed
+more reasonable. After all, they were not sure that the former tail had
+seen the _Water Witch_ in St. Thomas, or had known of their connection
+with it. On the contrary, to get to Clipper Cay so soon after the
+Spindrifters arrived, the frogman must have left about the same time the
+scientists did. There was even a possibility that he had arrived ahead
+of the Spindrift group and that the frogmen's boat had been out when
+Rick and Scotty had first spotted the diving equipment in the house.
+Anyway, there had been no sign of any tail but the Virgin Islander while
+they were around the pier and on the _Water Witch_. Either he or Scotty
+would almost certainly have spotted a second man--especially since they
+had seen him before.
+
+There was a major precaution, however, to be taken: he and Scotty must
+not let Steve's former tail get a good look at them. They had to assume
+he had recognized their clumsiness for what it was--a deliberate stall.
+
+Scotty poked him, and Rick suddenly realized that he had been leaning
+for quite a long while on the broom he was supposed to be using.
+
+"Made up your mind about anything?" Scotty asked.
+
+Rick knew his friend had been watching him. During their many adventures
+each had developed a rather unusual understanding of how the other's
+mind worked.
+
+"Partly," Rick replied. He told Scotty his thoughts.
+
+"You make sense," Scotty agreed, then added practically, "but I don't
+see what difference it makes, whether they know about our connection
+with Steve or not. The moment they catch us snooping they'll assume
+we're enemies. Until then, they'll let us alone just as they've been
+doing."
+
+Zircon and Scotty joined forces to prepare lunch. The temperature had
+dropped sharply, and hot soup and hamburger sandwiches were welcome.
+
+After lunch, Rick braved the storm long enough to go to the _Water
+Witch_ for his camera. He returned to the cottage soaked to the skin.
+"We'll need diving equipment to go outside if this keeps up," he
+announced.
+
+He took the camera case apart and disconnected his circuits, then he
+went outside again with tools in hand and got into the Sky Wagon. The
+plane had a heater switch that would do. He removed it, leaving the
+wires to dangle for the moment. If the heater was needed he could put
+the wires together.
+
+That done, he sat in the plane and racked his memory for a source of
+sheet rubber. There was none, but he recalled a repair kit for the
+plastic floats in their tool supply. He found it and took it back to the
+house.
+
+Using the awl blade on his scout knife, he bored a hole through the
+plastic back of the case and installed the switch. Then he reconnected
+his circuits so the new switch would turn on only the infrared light. He
+waterproofed the switch as best he could, making gaskets from a rubber
+jar ring he found in the kitchen.
+
+He knew, however, that the switch wouldn't be waterproof under pressure.
+He took a sheet of plastic repair material from the float repair kit and
+shaped it carefully with his knife. After much trial and error he
+succeeded in cementing it onto the case so that it would protect the
+switch from the outside, but left enough slack for the switch to be
+operated through the flexible patch. Satisfied, he put it aside to dry.
+
+It was nearly time for dinner when he finished. He took a hand in
+cooking ham and eggs with fried potatoes, while Tony prepared a salad
+and made coffee.
+
+As they ate, Zircon gestured toward the front of the house. "Getting
+worse instead of letting up. This must be a hurricane, although I've
+never heard of one quite this early in the season."
+
+"If it gets much worse we'll have to anchor the cottage," Scotty
+observed.
+
+They finished just in time to tune in for the weather forecast from St.
+Thomas. According to the announcer, the storm was now centered off the
+island of St. Croix, moving in a northwesterly direction. That meant it
+would pass St. Thomas, and perhaps come very close to them. The
+announcer said, "While the storm has many of the characteristics of a
+hurricane, including the general form and wind velocities, we hesitate
+to designate it as one."
+
+"In other words," Tony said, "it's a hurricane but we'll call it
+something else because it's too early in the season for hurricanes."
+
+"Whatever it is, we'll have more of it," Zircon stated.
+
+Rick switched to the Navy command frequency in time to intercept a
+conversation with a destroyer somewhere off the British Virgin Islands.
+The destroyer had just lost one of its boats.
+
+At four minutes after six the air went silent, then a new voice took
+over the microphone. The voice said:
+
+"_A message for the ones who hunted blue sheep._"
+
+"That's us!" Rick gasped.
+
+When Steve had dispatched Rick, Scotty, and Zircon to Tibet, it had been
+with the cover story that they were going to hunt the blue sheep called
+Bharals in the mountains of West China. Only Steve would know that. The
+message was from him.
+
+Static crackled, but the message was clear:
+
+"_The one who started the hunt needs the biggest hunter. Only the
+biggest hunter. He should be delivered as soon as possible. Call your
+usual contact before arrival and say that the doctor is coming and to
+notify the patient._"
+
+The message was repeated, while the four strained to be certain they had
+heard every word. When normal traffic resumed, Rick switched the set
+off.
+
+"It appears," Zircon said slowly, "that I'm wanted."
+
+"Yep." Scotty grinned. "The demand is there, all right. But delivery is
+a long way off."
+
+The storm punctuated his words.
+
+
+
+
+CHAPTER XIV
+
+Below the Dark Coral
+
+
+The sky was overcast, ceiling about two thousand feet, visibility about
+two miles. The wind was moderate and steady. Rick examined the water in
+front of the cottage and told his friends, "I can take off all right.
+But I don't want to leave without a weather report or we might find
+ourselves with no place to land."
+
+"I'm going to swap this radio for a newspaper," Scotty grumbled. He had
+been trying without success to get a weather report.
+
+Tony Briotti looked at the Sky Wagon, brows furrowed, then asked, "Rick,
+couldn't you turn on the radio in the plane and get a weather report
+from the airport at Charlotte Amalie?"
+
+Rick was climbing into the Sky Wagon before Tony finished. Of course he
+could! He called, "I'm a chump!"
+
+The set warmed and Rick called the airport, then held the phones to his
+ears to hear the reply through heavy static. When the airport answered
+he asked for a weather report for the area between St. Thomas and
+Clipper Cay. He got it, and climbed out, his face thoughtful.
+
+"The storm is having a pup," he told the others. "We're in a lull at the
+moment. The main storm swung off to the north, but there's another one
+right on its tail. We have just about time to get to Charlotte Amalie
+and back before the second one closes us in."
+
+The group went into action fast. All four pushed the plane into the
+water. Zircon ran to pack a bag, and Tony went to get the film Rick had
+taken for Zircon to carry to Steve. Scotty and Rick went through the
+check list, inspecting the plane for possible storm damage. Then Rick
+started the engine and warmed it up. By the time they were ready, Zircon
+was climbing aboard.
+
+Scotty yelled, "Tony and I will keep the home fires burning. Don't waste
+any time, Rick!"
+
+"I won't."
+
+Zircon closed the cabin door and Rick taxied out. In a few moments he
+was air-borne, swinging seaward over the north end of the island. He
+looked down and saw two of the frogmen. They were in front of the house,
+watching the plane.
+
+"Be sure to tell Steve everything," Rick reminded the big scientist,
+"and don't forget to give him the film. I won't have time to see him,
+unless he meets the plane. But it doesn't matter, because you know
+everything Scotty and I do."
+
+"I'll be glad to get actively to work on this confounded business,"
+Zircon stated. "I'm so curious about that brass ball the frogmen had in
+the cave that I'm about to burst."
+
+Rick set a compass course for St. Thomas, flying just under the clouds.
+When they were a half hour out he contacted the airport again and asked
+for the weather. The report hadn't changed. He told the airport
+operator, "The doctor is coming. Please notify the patient." He could
+almost see the operator jerk to attention as the headphones gave out a
+crisp "Roger."
+
+He sat down on a heavy chop at Charlotte Amalie, and the Sky Wagon gave
+them a rough ride as he taxied to the pier. Lieutenant Jimmy Kelly was
+waiting in a Navy sedan with an armed guard in attendance.
+
+Rick supervised the refueling of his plane at the pier gasoline depot, a
+task he would not delegate to anyone else. The presence of attendants
+made it impossible to talk to the Navy lieutenant.
+
+As Rick tightened the gas cap, Jimmy Kelly said, "Hop into your great
+mechanical bird and shove off, birdman. You'll just about beat the
+weather home as it is. Don't stop to fish on the way."
+
+"I won't. Professor Zircon will tell you an interesting story. And we'll
+be monitoring the command channel at six for any advice you can give
+us."
+
+"Okay. Don't get your feet wet."
+
+Rick waved good-by to Jimmy and Zircon, then taxied out to the clear
+area and took off. The ceiling was lower than on the trip in, and he
+almost missed Clipper Cay because of strong winds and low visibility. He
+spotted the southern tip of the island just in time to avoid going right
+on by. He landed with beads of perspiration on his forehead. If he had
+missed, with luck he might have hit Puerto Rico, but more likely he
+would have had to make a landing in the open ocean.
+
+Scotty and Tony came to greet him.
+
+"We were worried," Tony said. "It's closing in fast."
+
+"I got a little worried myself," Rick admitted. "Anything new here?"
+
+Scotty gestured toward the northern end of the island. "Our pals have
+been busy, diving. They got the brass ball, or whatever it is, and
+stowed it aboard their boat. I kept an eye on 'em through the
+binoculars. Also, I suspect they're going to do some more diving,
+because they left their equipment on the boat."
+
+Rick didn't particularly care at that moment. The flight back had been
+something of a strain. "Let 'em go," he said. "We can't do anything
+about it, anyway--not in broad daylight. Maybe tonight we can take a
+look."
+
+They spent the afternoon indoors, napping or reading, unable to swim or
+fish because the second storm had arrived on schedule. Then, a few
+minutes before six, Rick turned on the radio to the Navy command
+channel.
+
+At six on the nose, the radio emitted: "_A message for the blue-sheep
+hunters. The blue sheep seen by the big hunter and the little hunter is
+important. Obtain more information if possible. But remember that the
+owners of the sheep are also mighty hunters. The snapshots of the sheep
+were fine._"
+
+The message was repeated. When they were sure there was no more, Rick
+switched the set off. "Well, we're in it, and with Steve's blessing. Now
+what?"
+
+Scotty shrugged. "Now we steal the brass ball. Didn't Steve's message
+say to get more information?"
+
+"Apparently the pictures turned out well, if I understood that reference
+to snapshots correctly," Tony said. "Be serious, Scotty. What can we do
+next?"
+
+"Keep an eye on the frogmen, I guess, and play it by ear. I can't see
+anything else to be done. We probably could steal their brass ball, all
+right, but they'd know at once who had done it because we're the only
+other people on the island."
+
+"Have you looked recently to see what they're doing?" Tony asked.
+
+Neither boy had. Both went to the front porch, but the frogmen's cottage
+was invisible through the driving rain. "We'll have to go see," Rick
+said.
+
+"After dark," Scotty added. "In about an hour. It will be pretty dark
+then."
+
+"Do you suppose the brass ball is still on the boat?" Rick inquired
+thoughtfully. "We might be able to sneak aboard after dark and get a
+picture of it from close up, and we could examine it and have something
+definite to report to Steve."
+
+"That's a possibility," Scotty admitted. "Anyway, we can get ready."
+
+Rick rechecked the camera and infrared unit. He loaded the camera with a
+fresh roll of film. Then the three sat in the living room over coffee
+and listened to the storm batter at the front of the house until it was
+nearly dark outside.
+
+"What now?" Tony inquired. "Do we all go? Or just one of us?"
+
+"No point in all of us getting soaked," Scotty said. "Have you had any
+experience in this kind of spying, Tony?"
+
+The archaeologist had not. He grinned. "Until I came to Spindrift, I led
+a rather quiet, academic sort of life. Except for the war, of course."
+
+"Then Scotty or I had better go," Rick said. "Or both of us."
+
+Scotty shook his head. "No need for both. It's only a reconnaissance,
+anyway. Toss you for it."
+
+Rick produced a coin. "All right. Call it." He flipped it as Scotty
+claimed heads. It was a tail.
+
+"Best two out of three?" Scotty invited.
+
+Rick grinned. "And after that, best three out of five?"
+
+Scotty growled, "All right. I'll go." He got ready by taking off shoes
+and socks. He could change his shirt and shorts when he returned. He
+slipped through the back door and was gone.
+
+Rick turned on the radio, tried for a weather report, and settled for a
+Miami disk jockey who was playing some good records. The static was bad,
+but the station came through clearly enough to make listening worth
+while.
+
+Scotty was back before a half dozen records had been played. He sat
+down, ignoring the water that dripped from him. "Listen, our friends
+just rounded the northern tip of the island in the boat and they're
+heading south just inside the eastern reef. What do you make of that?"
+
+Rick pictured the movements of the enemy boat from Scotty's description.
+"They can't be putting out to sea, otherwise they'd be outside the reef.
+And they're not interested in anything on the island or they'd have
+walked. I'd say they're planning to do some night diving on the eastern
+side of the island."
+
+"In this kind of weather?" Tony asked incredulously.
+
+"Sure. It's stormy on top, but once you're below the wave motion it's
+quiet as ever. They could dive."
+
+Scotty stood up. "If they can, so can we."
+
+There was no denial to that. They made a trip to the _Water Witch_ and
+collected their equipment, then planned what they would do.
+
+"We'll all use lungs," Tony said. "We have three regulators and there
+are plenty of full tanks, enough for two dives each. However, we have
+only two pairs of glasses for the dark-light camera. I'll yield to
+Scotty as the more experienced diver, so you and he use the glasses,
+Rick. I'll stay on top, or near the top, with a single float, and a gun.
+If I use the lung I can stay submerged most of the time and not have to
+fight waves."
+
+"Lash yourself to the float," Scotty cautioned.
+
+"And we'll use a buddy line," Rick added. "The same one the professor
+and I used. Scotty, you take a gun, and I'll take the camera."
+
+"If I see any trouble in the making, I'll bang on my air tank," Tony
+said. "You should be able to hear that for quite a distance."
+
+There was nothing else to be planned in advance. They picked up their
+equipment and went out the back door into the storm, crossing the island
+through the palms. As they emerged onto the eastern shore, Scotty
+called, "Look--about five hundred yards north."
+
+The lights of the frogmen's boat, visible as bright halos through the
+rain, were tossing violently just inside the eastern reef. Apparently
+the boat was anchored. The rain was too thick for them to see any
+movement aboard, or to see details of the boat itself.
+
+"Move carefully," Rick cautioned. He had to raise his voice to be heard
+above the storm. "We haven't explored this shore. It may be full of
+coral heads."
+
+"I doubt it," Scotty returned. "It would be too dangerous for the boat
+in this kind of weather, even if they knew a channel."
+
+"Rick's right about careful movement, nevertheless," Tony replied. "We
+must move with care, especially near the reef." He indicated his float.
+"I'll never be able to tow this through that water, so I'll leave it in
+the palm grove. We can pick it up on the way back. We shouldn't need it
+with lungs, anyway. Do you boys have rescue packs?"
+
+The packs were plastic floats compressed into packages no larger than a
+cigarette pack. They contained a carbon-dioxide cartridge and could be
+inflated simply by squeezing them, which punctured the cartridge. The
+boys had carried them on their weight belts for so long that they took
+them for granted.
+
+They donned their equipment, then walked down to the beach. The surf was
+not heavy, since the wind was blowing from the opposite side of the
+island. Nevertheless, there was enough water motion to lift a fine
+screen of sand and dust.
+
+"The camera will be useless until we get into deeper water," Rick
+called. "Let's rope together and swim straight out."
+
+They waded in, awkward in the fins, until they were deep enough for
+swimming. Then all adjusted mouthpieces and started out. Rick tried the
+infrared light intermittently, but not until they were in about twenty
+feet of water did the roiled bottom allow its use. He led the way to the
+reef, the others following in file.
+
+The reef was closer to the surface than on the western side. Rick had to
+swim along it until he found a place where they could cross without
+being buffeted by breakers. Once across, he swam down the face of the
+reef, knowing that the trip was hard on Tony, because the underwater
+world was completely dark to one without light, or glasses with which to
+see the infrared illumination.
+
+Rick found a fairly level shelf at about thirty feet and swam along it,
+keeping close to the reef wall, until he thought they were in the
+vicinity of the frogmen. Then he pulled twice on the tie rope in a
+signal to surface, knowing that Scotty would pass the signal along to
+Tony.
+
+He emerged in a rough sea, only yards from the point on the reef
+opposite the anchored boat. He was in time to see two frogmen climb down
+the boat's ladder. They got into the water and the third man, on deck,
+lowered the brass object to them.
+
+Rick had no fear that they would be seen from the boat. Their heads
+would be hidden by the breaking waves, and their bubbles would merge
+with the natural foam.
+
+He saw at once what their tactics should be. He pulled Scotty and Tony
+to him, then let his mouthpiece drop. Putting his lips close to their
+ears, he said softly, "If it's like last time, they won't be down long.
+Scotty and I will track them to find out where they go, and watch what
+they're doing. Then, after they leave, we'll see if they left anything
+behind."
+
+Scotty and Tony nodded. Tony untied the line that had held him to
+Scotty. Rick replaced his mouthpiece, cleared a little mist from his
+face mask, and led the way down.
+
+This time the infrared light operated continuously. Now and then Rick
+worked the toggle switch through its loose plastic covering and shut the
+unit off while he searched for visible light. He found it, far down the
+face of the reef.
+
+The camera made it easy, and his mind was at rest because this time
+nature had made it impossible for their bubbles to give them away to
+surface watchers.
+
+There were heavy swells on the surface. He knew it because of the
+pressure surges on his ears. But otherwise there was no sign of the
+storm. He grinned because he suddenly realized that he felt dry. On the
+surface, with the rain beating at him, he had felt like a drowned
+kitten.
+
+Moving with the confidence gained in his first experience, he led the
+way seaward, then went to the level of the light. Soon they were close
+enough to see the frogmen working over something on a coral ledge on the
+reef face. They hovered motionless, watching, and as one of the frogmen
+moved they saw that it was the brass ball.
+
+Rick started his camera. He had an advantage, because the frogmen were
+concentrating on what they were doing, their backs to him. He moved in
+cautiously, camera grinding, then backed away again when he thought he
+had enough long shots.
+
+One frogman moved away a few feet, and Rick's breathing stopped as the
+man's belt light flashed toward him. Had the frogman been looking, he
+could have seen the boys, but he was too interested in the second
+frogman's actions.
+
+The second frogman crouched over the brass object, hand moving.
+
+Rick recoiled as a wail lanced through his head with painful impact. He
+felt the rope tighten as Scotty involuntarily drew away.
+
+It was not the octopus, then! It was the brass ball that wailed. But
+why? For what possible reason?
+
+The frogmen were apparently satisfied. One of them picked up the
+powerful light they had been using and turned it off. Then, with only
+belt lights, they started back up the reef.
+
+Rick waited until the lights were no longer visible. He glanced at his
+depth gauge and wrist watch. They were at eighty feet, and they had
+plenty of air left. He swam to the brass ball, camera grinding.
+
+He had never seen anything quite like it. The brass sphere was mounted
+on a box about twelve inches square and six inches high. From the
+sphere, two rounded projections thrust out. He identified a waterproof
+switch on the box, and two small knobs mounted on calibrated plates.
+These were obviously controls, but he had no idea what they controlled.
+
+Steve would want a few close-ups. Rick worked his camera focus and took
+shots from every angle. When he had enough, he pulled twice on the rope
+in a signal to surface. Scotty motioned to him to lead the way.
+
+As Rick started up, four metallic clangs, irregularly spaced, rang
+faintly in his ears.
+
+Tony, banging his tank in the signal for trouble! Rick instantly changed
+course and followed the bottom, watching the water overhead for any sign
+of the frogmen. When he had reached a spot below the point on the reef
+where Tony should be waiting, he turned toward the surface, moving
+slowly, searching for any sign of activity. There was no sign of
+whatever had alarmed Tony.
+
+He paused a few inches under the surface, then carefully put his face
+into the air. Scotty surfaced beside him.
+
+There was no sign of Tony. Rick peered through his mask and saw that the
+boat was still anchored in the same place. There were figures on its
+deck. Four of them--Four! He ripped his mask off for a clearer look, and
+his heart skipped a beat. The frogmen had Tony!
+
+
+
+
+CHAPTER XV
+
+How Sings the Gay Sardine?
+
+
+Rick and Scotty held a hurried consultation, mouth to ear.
+
+"We'll have to get him," Scotty whispered urgently. He held up his spear
+gun. "I've only got one shot in this."
+
+Rick's instinctive reaction was the same. They had to rescue Tony! But
+they also had a job to do.
+
+"Wait," he cautioned. "They probably don't know we're here. Tony
+wouldn't give us away. If they find out, we'll lose the pictures, and we
+may make it worse for Tony. Let's stay right here and watch."
+
+Scotty subsided. They floated motionless, eyes on the boat, peering to
+penetrate the mist. The rain had let up somewhat, but the air was far
+from clear.
+
+Rick would have given the treasure they sought to be able to hear what
+was being said on the boat. The three frogmen were all facing Tony, and
+the conversation seemed to be pretty animated. Then, as he watched, the
+boat pulled up anchor. It moved north.
+
+"They're taking him to their house," Scotty gasped.
+
+The boys swam frantically for shore, recklessly crossing the reef
+without regard to the danger of cutting themselves on the sharp coral.
+They reached the beach and shed tanks and equipment under the palms,
+then raced for the frogmen's house.
+
+They could see the lights of the boat as it rounded the northern tip of
+the island, and, lying among the palms, they watched it tie up at the
+pier. Tony and the three frogmen got off and walked down the pier. Rick
+strained to see, and could not find any sign that Tony was covered by a
+gun. But that wouldn't be necessary, anyway, since he was outnumbered
+three to one.
+
+The four marched up to the front door of the frogmen's house and
+stopped. The boys were prone under a palm less than twenty feet away.
+One of the frogmen said, "Let me get a jacket. I'm getting chilled. Then
+we'll walk you home."
+
+There was something very odd here! Rick nudged Scotty and they backed
+slowly away. When they were sure they could not be seen, they stood up
+and ran on silent bare feet through the palm grove, circling to approach
+their own cottage from the rear.
+
+[Illustration: _Rick nudged Scotty to back away_]
+
+At the back door they paused. "Now what?" Rick said helplessly. "They're
+bringing him home. Why?"
+
+"I wondered about that while we were running. I think they're bringing
+him home to check up on us. He must have sold them some kind of yarn."
+
+"Steve's tail will recognize us!"
+
+"Not if we're in bed," Scotty answered quickly. "We'll pretend to be
+asleep. Come on."
+
+"Just a minute." Rick hurried to the shed and got two short hand spears.
+He handed one to Scotty. "Here. Have a bedfellow."
+
+A few minutes later they heard footsteps and voices on the front porch.
+The door opened. A strange voice said, "Your friends don't seem to be
+here." The voice hardened. "I thought you said they were?"
+
+"They're probably in bed," Tony replied mildly. "We go to bed right
+after dark because there's nothing to do."
+
+"Except stick your nose in other people's business," a harsh voice
+snapped.
+
+Tony replied tartly, "I've already apologized for letting my curiosity
+get the better of me."
+
+"I'd like to see the bedrooms," a third voice said. Rick thought it
+belonged to the man they had taken off Steve's tail.
+
+He lay motionless as a form blocked out the lamp-light from the living
+room. In a moment the voice said, "They're asleep, all right. They must
+sleep soundly."
+
+"Young men do." Tony sounded relieved.
+
+Rick grinned to himself. The archaeologist couldn't have known they were
+in bed, but his stall had worked.
+
+"All right. We'll be going. But keep in mind that the most stupid thing
+anyone can do is to dive alone, even by day. At night it's worse than
+stupid. It's sheer insanity. Also, we'll thank you and your party to
+keep away from us and not gum up our recordings with your flipper noises
+and bubble sounds."
+
+"We will," Tony said. "Good night."
+
+The front door closed. Scotty rose, slid open the window, and went out.
+Tony scraped a chair in the living room. Rick stayed where he was, in
+case the frogmen had lingered outside. In a few moments he heard the
+back door open and close, and he tensed, but it was Scotty's voice that
+spoke.
+
+"They're gone. I just wanted to make sure."
+
+The three gathered in the living room, and Tony chuckled. "If I
+associate with you two for much longer, I'll get to be the world's
+champion dissembler."
+
+"What happened?" Rick demanded.
+
+"Simple and unlucky. The two frogmen surfaced practically under me. My
+own fault, because I had moved much closer to the boat. I think one of
+them almost fired a spear at me, but the other stopped him. They invited
+me to go aboard, and I didn't think it wise to refuse the invitation."
+
+"I imagine not," Rick commented grimly. "Then what?"
+
+"Naturally, they demanded to know what I was doing. I admitted to
+overpowering curiosity that got the better of my manners. They wanted to
+know who I was and why I was on the island. I told them the truth, of
+course, at least partly. I identified all of us. Then I'm afraid I told
+a slight untruth. I said we had found reference to the _Maiden Hand_ in
+an old manuscript, and were diving in hopes of finding cannon and other
+old things which we planned to sell for museum pieces to pay for our
+vacation. I believe they accepted my story."
+
+"It's a good story," Scotty approved. "Just enough truth to make it ring
+true."
+
+"They've been watching us," Tony went on. "They asked why the plane had
+gone, and why it had come back with only the pilot. I told them
+Professor Zircon had cut himself and gotten a coral infection, and that
+the doctor at Charlotte Amalie felt that he should stay there for
+treatment."
+
+"I guess they haven't recognized Scotty and me as the two who stopped
+Steve's tail."
+
+"Seems not," Tony agreed. "Well, I admitted that I was still curious
+about their activities, since night diving is not common. So they told
+me a story."
+
+The boys waited breathlessly.
+
+"These gentlemen thirst for scientific knowledge," Tony said with a
+grin. "They claim an interest in ichthyology, but they know less about
+fish than any cat does. Their story is that they have developed an
+underwater recording device with which to make recordings of fish
+noises. Since they have some evidence that certain fish make their
+noises only at night, it is obviously necessary to make recordings at
+night. So they dive, leave their equipment, and pick it up the next
+morning. Our diving too close to their gadget creates false sounds,
+especially our bubbles. Therefore we are requested politely but firmly
+to stay away."
+
+Scotty whistled.
+
+Rick laughed. "Quite a story," he said.
+
+"I pointed out the obvious," Tony went on, "that it was strange they
+should choose a stormy night. Their answer was that storms upset fish,
+and they thought it possible that some sounds might be obtained only
+under storm conditions."
+
+"Very interesting," Rick remarked. "It's a good story, and if we didn't
+know Steve was after at least one of those men, we'd probably believe
+it!"
+
+"Fish noises!" Scotty exclaimed. "If they knew we'd been snooping around
+before, they'd probably claim that the octopus really did wail, and that
+they were only recording him. Your gag about screaming squid and
+burbling barracuda would appeal to them, Tony."
+
+The archaeologist chuckled. "Anyway, we got out of that one pretty well.
+I had a little trouble banging my tank. Didn't want to do it overtly, of
+course. Finally I managed to get in position while we were swimming to
+the boat, and I banged my tank against one of theirs. But how did you
+know what to do?"
+
+Rick explained briefly, then he broke into a smile again. "These guys
+are smart," he declared. "I like that fish-recording story."
+
+"It's appealing," Tony admitted. "I'm almost tempted to pay them another
+call tomorrow to ask if they have captured for posterity the hunting cry
+of the wild sea trout, or the love song of the gay sardine."
+
+"But you won't," Scotty said practically. "You certainly came out of
+that mess with a whole skin, Tony."
+
+Rick laughed. "He's adventure-prone. And lucky. How do you beat a
+combination like that?"
+
+
+
+
+CHAPTER XVI
+
+The Deadly Spring Gun
+
+
+The storm blew itself out by noon of the following day, leaving an
+overcast sky and heavy swells. An inspection with the binoculars showed
+that all was quiet at the frogmen's house. Their boat was tied to the
+pier.
+
+"They probably recovered the brass ball during the night," Rick
+observed, "or perhaps early this morning."
+
+"The question is," Scotty remarked, "did they take the gadget to the
+octopus cave?"
+
+Tony joined them on the porch in time to hear Scotty's query. "I can
+shed some light on that. It happens that I woke up at dawn and looked
+out to see how the weather was behaving. The frogmen were anchored off
+the eastern reef in the same place. We can assume that they picked up
+the brass ball and put it back in the cave near the wreck."
+
+Rick rubbed his hand over his short hair in a gesture of bewilderment.
+"But what's their game? What do they get from the brass ball?"
+
+"I rather imagine Steve Ames would like to know the same thing. If you
+boys have no objection, I think I'll spend the afternoon at my midden.
+What are you planning?"
+
+Rick looked at Scotty. "Dive at the wreck?"
+
+"Sure. Frogmen or no frogmen, there's still a golden statue of St.
+Francis somewhere down there."
+
+After lunch the boys checked their equipment, being particularly careful
+because they had not rinsed out the regulators with fresh water after
+every dive. Their small supply of water, coupled with the odd hours at
+which the equipment had been used, was the reason. They took a little
+water from their supply and used it to clean the regulators. The rest of
+the equipment would just have to wait.
+
+Tony departed for his Indian midden, tools slung over his shoulder. The
+boys started the compressor to fill the tanks used the previous night,
+then untied the _Water Witch_ and headed for the diving area. Scotty
+scanned the frogmen's house through the glasses, but saw nothing of
+interest.
+
+They anchored just outside the reef and looked for their buoy. It was
+gone, probably torn away by the storm.
+
+"We can find the wreck again," Rick said. "No trouble. I could find my
+way around here in the dark." He grinned. "I have!"
+
+"Shall we take a look in the octopus cave too?"
+
+"A quick one. I doubt that we'd see more than we saw last night. Our job
+now is finding out what kind of information the frogmen get. And I don't
+know how we'll do that."
+
+"Wait for a break," Scotty replied. "Come on. Let's get into the water."
+
+It was cold. The storm had blown in colder water from the open sea. Rick
+felt goose flesh and wished they had brought along midseason suits.
+
+The water was murky, too, because of the sand and silt stirred up by the
+storm. The murkiness started about twenty feet below the surface. Not
+until they were over fifty feet down did the water clear again. The
+light was reduced somewhat by the murk, but visibility was good. Rick
+had brought his camera to take motion pictures around the wreck. There
+would be enough light.
+
+Scotty carried the big jet spear gun. It was powerful enough to spear
+sharks or big barracuda, just in case the frogmen decided to be
+"mischievous" again.
+
+Rick led the way to the octopus cave, glancing up now and then to make
+sure they were alone in the water. The little octopus was in his usual
+position on the ledge.
+
+Scotty, spear gun extended, swam right into the cave. Rick followed,
+holding the camera tightly to his chest to keep it from scraping on the
+coral. Scotty had his flashlight going, so Rick didn't bother with his
+own.
+
+The cave was just about large enough for both of them. It was a typical
+coral formation, not much different from the reef outside, except that
+the brass ball was in the center of the rough floor.
+
+The boys examined the cave thoroughly and saw nothing of interest. Rick
+pushed at Scotty's shoulder and swam out again. Scotty followed. The
+octopus watched them go.
+
+The wreck of the _Maiden Hand_ was just as they had left it, and the
+grouper was back in his comfortable cabin. He departed at high speed as
+the boys appeared. They had agreed to start work aft of the captain's
+cabin, and the wrecking bars were carried under their tank harnesses for
+the purpose. Both were convinced that there was nothing more to be found
+in the cabin, although the possibility remained that false boards in the
+floor or walls might conceal the statue.
+
+Rick tied his camera to a projection, then took his wrecking bar and
+looked for a place to start. Scotty pointed to a place where there were
+boards aft of the cabin they had already uncovered, and they started to
+work.
+
+By the time they had pried off the first few boards it was time to
+surface. They went topside and changed tanks, then rested for half an
+hour. There was no sign of activity at the frogmen's house, nor could
+they see Tony at work on his midden, since the location was hidden by
+palms.
+
+Rick said thoughtfully, "The brass ball might be some kind of signaling
+device."
+
+"What kind of signals?"
+
+He didn't know the answer to that. "Anyway, since it's underwater, if it
+sends out anything it must be sound impulses. Otherwise we wouldn't hear
+it wail. And what good is sound if not for signals?" added Rick.
+
+"Sonar," Scotty reminded.
+
+The boys were familiar with sonar because of the Spindrift work on the
+Submobile. Very high frequency sound impulses were sent out, and the
+echoes were timed or used in other ways. It was the way in which bottom
+tracings were made by surface craft, and the way in which Navy ships
+detected submarines. It could be used for locating schools of fish.
+
+"It could be sonar of some kind," Rick agreed. "But what good would it
+do anyone to stick a sonar device on an island like this?"
+
+And there speculation stopped again, the question still unanswered.
+
+They dove to the wreck and continued the hard labor of taking the aft
+end of the ship apart. When they finally got the new area cleared of
+rotted boards and timbers it was only to find a cabin already filled
+with sand.
+
+Rick borrowed the spear from Scotty's gun and thrust it down into the
+sand. It slid in easily, meeting no obstruction. He probed with it but
+found nothing except more sand.
+
+Discouraged, he wrote on his belt slate, "Mybe no bottm. Flr of cbn my
+be gne."
+
+Scotty nodded. He lifted his hands in a gesture of inquiry. Now what?
+
+Rick thought about it for a moment. Tony had been right! They probably
+would have to remove every board in sight, carrying the ship away piece
+by piece. But then what? There was the distinct possibility that the
+statue was somewhere under sand, and they had no way of removing the
+sand to see.
+
+It was apparent that most of the ship was under the sand--if the
+remainder of the ship was still intact. But Rick couldn't escape the
+feeling that Captain Campion would have kept the statue close to him.
+And that meant in the aft part of the ship, the part that was exposed.
+
+Scotty hooted twice, pointing at his watch. It was time to surface. The
+next dive would be their last for the day.
+
+On the surface, Rick sounded discouraged as he said, "The cabin we
+uncovered might not even have a deck. There may be nothing but a mile of
+sand under it. And there isn't much of the aft part of the ship left to
+explore, either. I guess tomorrow we can plan to take the captain's
+cabin apart board by board."
+
+"We'll need Tony and Zircon for hard labor like that," Scotty answered.
+"Notice how quickly you get tired down there? Also, we use air a lot
+faster when we work."
+
+"Let's just sort of make a survey this time," Rick suggested. "We can
+probe for any cracks we might have missed, and I'll take some over-all
+shots of the wreck. Then we'll call it a day."
+
+They followed Rick's plan. He took pictures of Scotty, with wrecking
+bar, prying at likely places in the exposed part of the ship. But Scotty
+uncovered nothing of interest. In one place his prying disturbed another
+moray, who demonstrated his anger at the intruders by trying to fasten
+his needle teeth in the wrecking bar.
+
+A metallic clang caused them to lose interest in the eel suddenly. They
+looked at each other, then turned and swam toward the apparent direction
+of the sound. At that moment a distant wail struck their ears.
+
+The brass ball!
+
+Rick wondered. He had heard no boat noise. The brass ball must be
+operating automatically. He hooted for Scotty's attention, then pointed
+toward the cave.
+
+Scotty checked his spear gun and motioned for Rick to lead. Rick pushed
+his camera in front of him and made his fins move rapidly. There might
+be some outward sign when the ball sounded, something that would tell
+them a little about its mechanism or purpose.
+
+As the cave came in view he coasted, looking upward. The murky layer
+prevented his seeing very far, but there was no one in sight. He let
+inertia carry him toward the cave, then swung upright in the water as he
+saw that the octopus had moved a little distance from the cave mouth.
+
+Instinctively Rick knew that something was wrong, but it was too late to
+get out of harm's way.
+
+A frogman emerged from the cave, spring-type spear gun pointed directly
+toward them. The frogman held the brass instrument in his free hand.
+
+Even as Rick hooted a warning, the frogman fired!
+
+His spear lanced through the water directly at Scotty!
+
+
+
+
+CHAPTER XVII
+
+Trapped in Twenty Fathoms
+
+
+Scotty writhed to one side, and the fact that the frogman had fired from
+too great a distance gave him time to dodge. The spear went by, and
+Scotty lifted his own gun to return the shot.
+
+Rick, senses suddenly acute, glanced upward again in time to see two
+more figures descending through the murky layer. He hooted for danger!
+
+Scotty glanced up, too. Then, instead of firing, he sped forward and
+thrust the tip of his spear at the frogman's chest. The frogman lifted
+his hands high. Scotty jerked the man's face plate loose, then turned
+swiftly and motioned to Rick.
+
+Rick followed, fins driving, as Scotty led the way into deeper water in
+the direction of the wreck.
+
+The frogman who had been in the cave was temporarily out of things. His
+Scuba was the type that combined the breathing apparatus with the full
+face plate. He could clear the face plate of the water Scotty had let
+in, but it would take a little time.
+
+Suddenly Scotty shot upward. Rick turned and looked over his shoulder as
+he followed. The second two frogmen were in clear water now, and both
+had spear guns!
+
+Scotty led the way into the murky layer, then leveled off and swam
+horizontally. Rick wondered what kind of evasive action his pal was
+planning, but he followed without trying to communicate with the other
+boy. In a situation like this, Scotty's instincts were dependable.
+
+Rick stayed close to Scotty in the murky layer, swimming at his side and
+a little behind. After a few yards Scotty dove again, into clear water.
+Rick looked around but could see no sign of the enemy. Apparently the
+frogmen had followed and were still in the murk.
+
+Scotty shot downward, Rick at his side. The wreck was directly below
+them. Scotty didn't hesitate. He let his momentum carry him right
+through the grouper's front door into the cabin. Rick followed, half
+expecting to see Scotty and the grouper meet head on, but the fish
+hadn't returned.
+
+Inside the cabin, Scotty switched on his flashlight, took his slate, and
+wrote, "Thyl thnk we wnt bk to bot. We sty hr lng nuff thy fnd out we nt
+thr & cm bck lkng fr us. Thn we go up to bot."
+
+Rick nodded his understanding. It was good strategy, provided they timed
+it right. The frogmen would assume the boys had returned to the _Water
+Witch_ when they went up through the murky layer. They would examine the
+boat, then dive down again. At that time, if he and Scotty could time it
+right, the two groups would pass in the murky layer and the boys would
+emerge while their enemies were still descending.
+
+He looked at his watch. They had only a few minutes of air left. The
+frogmen would have more air, not only because they had entered the water
+after the boys were already on the bottom, but because they had not
+descended so deeply.
+
+He wrote, "Rlax. Brethe easy."
+
+The less effort they made, the longer their air would last. For a moment
+he debated suggesting that they share one tank by trading the mouthpiece
+back and forth, but that would leave one of them practically without air
+when they had to leave. He tried to imagine the movements of their
+enemies. The frogmen would be on the surface now, approaching the boat
+ladder with caution. They couldn't be sure the boys were not waiting in
+ambush.
+
+Both boys had switched off their lights and were resting motionless in
+the darkness of the cabin. A little light filtered through the hole near
+the roof, but not enough to see by.
+
+Suddenly the light was blocked out!
+
+Rick reached for his belt knife and Scotty thrust the spear gun forward,
+then both relaxed a little. The grouper had returned.
+
+The big fish turned at the opening and backed into his hole. He hovered
+in the opening, holding position while he stared out into his watery
+kingdom. Apparently the fish had no idea that the boys were in the
+cabin. When it came time to leave and they touched him or hooted at him,
+he would get the surprise of his life.
+
+Even in their predicament, Rick could see the humor in the grouper's
+reaction. He wondered if groupers were subject to heart failure from
+shock.
+
+Rick returned to trying to imagine the movements of the frogmen. Now
+they would be cautiously boarding the _Water Witch_, one up the ladder,
+the other climbing the anchor chain. They would be careful, still unsure
+whether or not the quarry was aboard.
+
+He thought he felt constriction in his lungs from the warning signal
+that his air was running out, but finally decided it was only his
+imagination.
+
+Now the frogmen would be aboard the _Water Witch_, making a quick
+search, spear guns ready to fire their lethal shafts. Now they would be
+in the cabin and shouting their disappointment.
+
+Now the frogmen would be hurrying back into the water, readjusting their
+face masks, ready to dive.
+
+The grouper shot out of the cabin with a flick of his powerful tail that
+raised the silt around them.
+
+Rick's heartbeat faltered. The grouper had been alarmed. They had
+mistimed!
+
+Right now, the frogmen were outside the _Maiden Hand_!
+
+
+
+
+CHAPTER XVIII
+
+The Fight on the "Maiden Hand"
+
+
+They had only one hope now--that the frogmen would make a quick survey
+of the wreck, then go away. The boys waited tensely, ears alert for any
+sound that would tell them the whereabouts of their enemy.
+
+There was only the sound of their bubbles.
+
+Rick pressed close to the opening and peered out. The water that could
+be seen from the entrance was clear. However, it was only a narrow
+sector. For all he knew, the frogmen might be right overhead.
+
+He backed down into the cabin and pushed his camera into a corner. He
+could get it later. Right now he preferred to have both hands free. He
+wished for a spear gun, to double their armament. But the other guns
+were on the _Water Witch_. The wrecking bars were useless, too. It was
+almost impossible to strike a blow against the resistance of the water.
+
+Something scraped outside, and both boys froze. There was no doubt that
+the frogmen were at the wreck. Why didn't they go away? They couldn't
+know about the entrance to the cabin--or could they?
+
+The moments dragged by. There couldn't be much air left in their tanks.
+Rick risked holding his wrist close to the opening and saw that his
+watch showed one minute of diving time before shortness of breath would
+signal time to turn on their air reserve and surface.
+
+Time was critical. If the frogmen didn't go away before their air ran
+out, they would have to surface, if they were allowed to by the enemy.
+With luck, Scotty could account for one. But that would leave two, both
+armed. By this time the first frogman would have blown the water from
+his mask and recovered his spear.
+
+No, it would be dangerous for Scotty even to take time for a shot,
+unless he could fire without pausing. Their best bet was to make a run
+for it, depending on speed.
+
+On land, he was sure he and Scotty could outrun the enemy, but in the
+water, speed depended on skill with the fins, and the power of leg
+strokes. He doubted that the frogmen were much faster than he and
+Scotty, but there was an excellent chance that their speed in the water
+was equal.
+
+He conserved his air, spacing his breathing, taking only enough air to
+keep comfortable.
+
+There was another scraping sound, and he knew the frogmen were still
+around. Were they actually searching the wreck? If so, they might find
+the entrance.
+
+And then Rick suddenly discovered a new danger!
+
+Their air bubbles had been floating to the top of the cabin, forming a
+pool under the ceiling. But they had stayed in the cabin so long that
+enough water had been displaced to bring the pool of exhausted air close
+to the entrance, which was only a few inches below roof level.
+
+In a moment the air would spill out, and rising bubbles would warn the
+frogmen!
+
+He gripped Scotty's shoulder and pointed to the silvery mass of
+exhausted air that curled perilously close to the entrance.
+
+The other boy saw the danger at once. He wrote on his slate, "We go whn
+air duz," and held it in the light for Rick to see.
+
+Rick nodded. He drew his belt knife.
+
+There couldn't be many breaths left before the air spilled out. Nor
+could there be many before warning constriction forced them to turn on
+the reserves. At this depth the reserve wasn't very great.
+
+He saw Scotty reach for his reserve lever and pull it down. A moment
+later he had to pull his own.
+
+Something rang like a struck tank, almost directly overhead!
+
+The lip of the bubble pool moved from the water motion caused by pulling
+their reserves. Rick watched it, scarcely breathing.
+
+The air pool trembled. A tiny bubble broke loose and sped upward.
+
+Rick squeezed Scotty's arm, then with a powerful thrust of his flippers
+he shot out into light, right into the stomach of a frogman!
+
+He thrust with his knife, and a hand gripped his wrist and twisted.
+Scotty shot from the hole in the wreck and turned, fins flailing. His
+spear gun belched carbon dioxide, and the deadly spear ripped into the
+leg of one frogman.
+
+Rick flailed arms and legs, trying to break free of the grip that held
+him. He saw the wounded frogman fire his spear at Scotty. The boy moved
+just in time, and the shaft shot between his arm and side.
+
+Scotty let go of his useless gun and grappled with the frogman, reaching
+for his knife with one hand while he gripped the frogman's wrist with
+the other.
+
+Rick knew their air was running out fast. He felt a knife glance from
+his tank and heard the ring of metal. He struggled for footing and
+turned in time to thrust a flippered foot into the stomach of the
+frogman behind him.
+
+Next to him he caught a glimpse of Scotty and his opponent rolling in
+the water, and he saw the shimmer of metal as a knife flashed.
+
+Arms locked around his throat. He reached backward over his head and his
+hands touched rubber. He gripped and pulled with all his strength and
+felt the man's face plate come free.
+
+The frogman who had lost his mask suddenly threw off tanks and weight
+belt and sped for the surface.
+
+The odds were even! Rick locked with his opponent and felt powerful arms
+drag him close. The man had more strength than he! He fought to break
+loose, and couldn't!
+
+Then the mouthpiece was pulled away from Rick's lips in mid-breath, and
+he choked on sea water.
+
+Without air--twenty fathoms down!
+
+Frantically he fought, locking his air passage so his last lungful
+couldn't escape. He got a hand free and caught his opponent's hose where
+it joined the tank. He pulled with all his strength and felt it give.
+Bubbles rose in a cloud.
+
+He would have sobbed if he could. It was the wrong hose! He had only
+torn loose the exhaust. He groped and found the intake hose, then,
+lifting his knee and thrusting for leverage, he pulled with all his
+strength. The hose gave! The grip on him loosened.
+
+Rick was now desperate for air! He pulled the quick release on his
+weight belt and felt it drop away, then he kicked for the surface,
+frantic with fear for Scotty. Had he gotten free? Had he? His last view
+had been of his pal locked with the remaining frogman!
+
+Bubbles streamed from his mouth as the compressed air in his lungs
+expanded under the decreasing pressure. He let himself exhale as he
+rose, fighting against panic and the impulse to lock the remaining air
+in his lungs. That would be fatal, he knew, and he willed himself to act
+properly. He kept his fins moving, knowing that, if he kept his head, he
+would make the surface.
+
+He passed through the murky layer and saw the surface like a wrinkled
+silver sheet far overhead. Straining, he swam for it, letting out his
+breath as the pressure on his lungs demanded.
+
+There was another boat hull in the water, almost over him! He angled
+away, to avoid coming up under it.
+
+And suddenly there were forms around the boat. A cry tore from his lips
+and was swallowed in the water.
+
+More frogmen! More enemies, when they were already defeated!
+
+
+
+
+CHAPTER XIX
+
+JANIG Takes to the Water
+
+
+A figure dove to meet Rick. He angled away, fighting the impulse to
+breathe, keeping the compressed air moving out of his lungs. The figure
+angled with him, then suddenly sheered off. Rick shot past and the
+figure followed.
+
+These new frogmen were diving in midseason suits. He was aware of nearly
+a dozen of them. He didn't count them; with his terrible need for oxygen
+he didn't care that much.
+
+He knew he would make it. He had to! But where was Scotty?
+
+Rick shot to the surface, went right through it, his impetus carrying
+him into the blessed air. He gulped a great lungful before he fell back
+with a splash, and as he hit water his fins were flailing, to carry him
+toward the hastily glimpsed shore.
+
+A masked figure surfaced beside him and called, "Take it easy!"
+
+He only moved faster. The frogman caught him easily, because the power
+was gone from his leg strokes now. But he had enough strength to fight.
+He reached for the frogman's face plate, and a strong arm pushed him
+back.
+
+A voice penetrated his consciousness. "Stop it, Rick, or I'll have to
+let you have one."
+
+The frogman knew his name! He hesitated, fist pulled back to throw the
+best punch he had left, and the new frogman back-pedaled.
+
+"Hold it," the frogman called, and lifted his face mask.
+
+Rick stopped moving, staring numbly.
+
+Jimmy Kelly! Lieutenant Kelly!
+
+"I'll tow you to the boat," the lieutenant called. "Relax."
+
+Rick obeyed, head spinning. He was a little groggy, and he couldn't make
+sense out of things. How had Kelly got here?
+
+And Scotty! Where was Scotty? He started struggling again, calling his
+friend's name.
+
+"He's all right," Kelly said urgently. "Relax, Rick!"
+
+Rick caught the words, and they penetrated. How did Kelly know Scotty
+was all right? But the lieutenant had spoken with authority, so he
+relaxed.
+
+Kelly towed him to the landing stage of the ship Rick had seen, a
+destroyer escort. Willing hands lifted him from the water. He slumped
+down on the edge of the stage, shaking his head to clear it while Navy
+frogmen stripped his aqualung harness from him and pulled the mask from
+his face.
+
+A voice said, "Drink this."
+
+A mug of steaming black coffee was thrust into his hand and he sipped,
+grateful for the spreading warmth it brought.
+
+Suddenly he started again. "Scotty! Where is he?"
+
+"Up here, Rick, with me."
+
+He looked up, and his eyes focused again--on Tony and Zircon!
+
+A motor whaleboat drew up to the landing stage, and two husky frogmen
+handed up a suited figure. "Here's one, Lieutenant," a frogman called.
+
+"All right, Danny. Where's the other?"
+
+"Heading for the reef at top speed. Jonesy's after him."
+
+"Go help Jonesy haul him in."
+
+"Yes, Sir." The motor whaleboat veered off and sped toward shore.
+
+A frogman surfaced almost at Rick's feet. He instinctively drew back,
+and the frogman gripped the edge of the stage, spat out his mouthpiece,
+and pulled up his mask with the other hand.
+
+Rick found himself looking at Steve Ames! What was he doing here?
+
+"Where's the brass ball?" Steve asked.
+
+"I don't know."
+
+With an effort Rick pulled his scattered wits together. His mind began
+to work again. Obviously, through some miracle Steve and Zircon had
+arrived on a Navy ship with Jimmy Kelly and a detachment of Navy
+frogmen.
+
+Scotty called from on deck. "It's at the octopus cave, Steve. I saw one
+of the frogmen drop it there."
+
+Steve hauled himself out to the landing stage. He grinned at Rick.
+"Feeling better?"
+
+"Much," Rick said. He was beginning to feel nearly human again.
+
+"Let's go on deck. I want to find out about this octopus cave."
+
+Rick stood up, and was surprised to find that he didn't wobble. He
+followed Steve up the ladder to the deck and found Scotty seated on a
+canvas stool, sipping coffee.
+
+Zircon asked anxiously, "Are you all right, Rick?"
+
+Tony said, "Here's the doctor for a look at you."
+
+A young Navy officer joined them and motioned Rick to a canvas stool. He
+applied a stethoscope and listened, then grunted his satisfaction. "He
+seems all right. Pulse a little fast, but that's to be expected. You had
+a slight dose of oxygen starvation. Feel better now?"
+
+Rick nodded. He was beginning to feel wonderful. They were out of it,
+and with whole skins.
+
+Scotty grinned sheepishly. "I abandoned you. I had to, because I ran
+completely out of air. I shoved my man away and headed for the surface.
+I felt pretty guilty about leaving you with two of them."
+
+Rick returned the grin. "I felt the same way. I thought I'd abandoned
+you. But I see you got to the surface first."
+
+Steve accepted a cup of coffee and squatted on the deck, facing them.
+"Suppose we start from the beginning. What happened?"
+
+Rick told him, starting from the moment when they had heard the brass
+ball wail. He finished, "There were three of them. Did you get them
+all?"
+
+"Yes. Including one with a spear through his leg. The last one is just
+being hauled aboard now. He tried to get to the island."
+
+Jimmy Kelly and a group of frogmen joined them. Jimmy asked, "How about
+the sounding gear, Steve?"
+
+"We'll ask now. How about that octopus cave? Where is it?"
+
+"We'll take you," Rick said. "Let us get tanks from our boat. There
+should be a pair fully charged by now."
+
+Steve shot a look at the doctor. The officer shrugged, then nodded.
+"Okay, if it's a short dive. They've had plenty for today."
+
+"Chief? Where are you?" Kelly called.
+
+A frogman stepped from the rear of the group. "Here, Sir."
+
+"Check their regulators, please. If they're okay, hook up fresh tanks.
+If not, loan them complete outfits."
+
+"Yes, Sir."
+
+"Thanks, Chief. Then get set to come with us. Danny, Jonesy, Mike, and
+Dick come along, too. Bring still and motion-picture cameras. When we
+get down, split into two-man teams and search the area. You know what
+we're looking for. It's just like the one we found off St. Croix."
+
+Rick stared at the frogman officer. Another brass ball off St. Croix?
+But there wasn't time for questions.
+
+"Quick dive, please," Zircon requested. "These boys have had enough."
+
+"They're through as soon as they show us the cave," Steve agreed. "Come
+on, gang. Let's get to it."
+
+Rick carefully checked his equipment, something that no diver can ever
+take for granted or leave to someone else, while Scotty did the same.
+Then they put the equipment on and adjusted face masks. Their knives,
+Rick's camera, and Scotty's spear and gun were somewhere near the wreck.
+They would have to get them another time.
+
+The group entered the water. Rick looked around and oriented himself by
+the position of the _Water Witch_, then led the way with Scotty, Steve,
+and Jimmy swimming along with him while the Navy frogmen stayed closed
+behind.
+
+It was a thrill for Rick to be swimming with the famous UDT frogmen. He
+looked to the side and saw that Steve was perfectly at home in the
+water, and he marveled at the adaptability of the JANIG agent. Steve
+hadn't been joking when he said he would be an expert by nightfall.
+
+At the reef Rick turned northward and led the way toward the level of
+the cave. A few moments later he hooted for attention and with pointed
+finger showed it to Steve and Jimmy. The octopus was still there.
+
+A frogman swam over and picked the little creature up. The octopus
+spurted away, leaving a blob of ink behind. He came to rest above the
+cave, poised for further flight.
+
+Rick swam down to the sandy floor of the cave and began to search for
+the brass ball. Scotty beckoned, and they swam together toward the spot
+where Scotty had last seen it. The frogmen swam to the bottom with them,
+then fanned out, searching.
+
+A few moments later someone hooted, and a tanned, muscled frogman swam
+over, holding the object triumphantly.
+
+Steve Ames pointed to the surface and Jimmy hooted an order. The group
+swam leisurely up through the murky layer, oriented themselves by the
+sleek shape of the destroyer escort hull, and emerged at the landing.
+The frogman who had found the ball handed it up to Hobart Zircon.
+
+Steve Ames motioned to one of the frogmen. "Run these fellows over to
+the beach, please, then wait and bring them back." He turned to the
+boys. "Put on dry clothes. Then come on back. We need to talk."
+
+An hour later the boys, the scientists, Steve, and Kelly were seated at
+a table in the destroyer escort's tiny wardroom, noses twitching over
+the savory steaks that were being served. The boys ate like starved men,
+talking a steady stream between bites.
+
+Rick sighed and let out his belt. "Well, that's our story. What's
+yours?"
+
+Steve stirred his coffee thoughtfully. "I can make it short. We don't
+know the whole story yet, but we will by the time I get back to St.
+Thomas. Have you two any idea what these brass-ball gadgets are?"
+
+"We decided that they were probably sonar equipment of some type,"
+Scotty said. "But we couldn't figure out what they were for."
+
+"Easy," Steve said. "Although you couldn't know, of course. They were
+for spotting submarines."
+
+Rick stared. Submarines?
+
+Steve saw his look of bewilderment. "It happens that our new
+atomic-powered submarines are conducting manuevers in this area. Does
+that help?"
+
+It did! Light slowly dawned. "Then these were scanning our subs! But I
+still don't see why it would be any problem to find them. The subs must
+have equipment that will tell when sonar beams hit them."
+
+"They do. And that's a big part of the story."
+
+Steve sipped his coffee for a moment. "These sonar devices are a new
+type, and very cleverly designed. They don't send out a continuous beam.
+Instead, they operate in bursts, in a random pattern. They might send
+out a beam twice in a minute, or wait an hour between bursts. The beam
+is a powerful one. It's effective for an extraordinary distance."
+
+"The wail, of course, was the beam operating," Zircon interjected. "You
+didn't hear the beam itself, since that's ultrasonic. But you did hear
+the mechanical vibration of the brass ball. It had a kind of
+sub-harmonic effect that was audible."
+
+"That's right," Steve agreed. "Anyway, there were several different
+stations, in different locations. Some were on islands, some on fishing
+boats. Since they operated only in short bursts in a random pattern, the
+subs--and the special teams we sent out--were never able to get a
+bearing that meant much."
+
+"They must be self-recording," Rick said thoughtfully, "otherwise the
+enemy couldn't get the information out of them."
+
+"They are. Whatever echo they get makes a tracing inside the box they're
+mounted on."
+
+Scotty objected, "But what kind of information is it? How can anyone
+tell anything about the subs from such recordings?"
+
+"By putting all the recordings together and running a rather complex
+analysis. The analysis will give speed, depth of operation,
+maneuverability--if the spies are lucky to have beams operating at the
+right time--and number of torpedoes fired, with the same information on
+the torps. That's enough information to make it worth an enemy's while."
+
+"I'll say!" Scotty turned to Zircon. "And what were you doing,
+Professor?"
+
+"I'm afraid I arrived on the scene too late to do much good," Zircon
+boomed. "However, I believe we can be useful in preventing such
+occurrences in the future. I have an idea for an improvement in our
+scanners that will allow a fix to be made on such beams."
+
+There was a pause when dessert arrived. The boys savored excellent apple
+pie smothered in a generous helping of ship-made ice cream.
+
+"We thought Zircon might help us work out a system of getting fixes on
+the transmitters," Steve said. "As it happened, we got a lucky break.
+The subs happened to have their devices pointed at St. Croix
+simultaneously when a beam scanned them. They got a fix on it. We flew a
+team of frogmen down in a Navy amphibian right in the middle of the
+second storm. They found it, and got the men who were handling it. One
+of them talked."
+
+Jimmy Kelly picked up the story, "You arrived with Zircon at about the
+same time the St. Croix team took off from our base, and headed right
+into the storm. They didn't get back until late last night, and it was
+nearly dawn before we got the story from the man who talked. Then we
+loaded on this DE and headed here."
+
+"I'm glad you didn't wait ten minutes longer," Rick said fervently.
+"They foxed us. I kept listening for their boat, but they didn't use
+it."
+
+"They probably decided to swim out and sneak up on you," Zircon stated.
+"After capturing Tony last night, their suspicions were probably aroused
+somewhat. Even if they swallowed his story entirely, it would be only
+good sense to check up."
+
+Tony looked hurt. "I'm sorry you don't think my story was enough to
+allay their suspicions entirely. But speaking of listening for their
+boat, why didn't you hear this ship coming? And why didn't the fancy
+frogmen?"
+
+Rick thought that one over. "We wouldn't have heard the ship until it
+was very close because of the noise our bubbles make. But we should have
+heard it about the time it left the reef opening near our cottage. I
+don't know why we didn't."
+
+"And I don't know why we didn't see it," Scotty added. "It's big enough
+to be spotted at horizon distance."
+
+Jimmy grinned. "We pulled a fast one. We had enough steerageway to drift
+over your position after a few turns of the screws down by the reef
+passage. You see, we didn't know what was going on, so we took no
+chances. Then, when we got into position, we got into the water without
+waiting to anchor. We dropped anchor right after we got both of you out,
+but you probably didn't notice."
+
+"I couldn't have cared less, at that point," Rick said, and Scotty
+echoed the sentiment.
+
+"The reason why you didn't see us coming is that we came from the other
+side of the island. It's safer for a ship that draws as much water as
+this one. Tony spotted us as we approached the southern point."
+
+Steve grinned. "Anyway, it's a good idea to move in on an objective as
+quickly, silently, and invisibly as possible."
+
+"Have you captured the rest of the stations yet?" Rick asked.
+
+"No. But we have teams out, and they know where to go and what to look
+for, thanks to the man who talked last night."
+
+"Who are these people?" Scotty demanded.
+
+Steve scratched his chin. "Well," he said finally, "you might put it
+this way: they're people who have no business knowing what they're
+trying to find out."
+
+Rick hid a grin. He knew perfectly well they would get no more
+information out of Steve. The essence of security is to give information
+only to people who have a need to know it. The Spindrifters had no
+reason for knowing the identity of the enemy, apart from their own
+curiosity. One thing was certain, though, it was another nation that
+wanted the information.
+
+"You're probably tired of answering questions," Rick said, "but I've got
+one more. How did you happen to arrive right in the nick of time?"
+
+"Nothing very mysterious about it," Jimmy Kelly answered. "We steamed up
+to the island and sent a boat ashore, with Professor Zircon. Dr. Briotti
+had seen us approach, and he met the boat. He told us you were diving.
+Zircon had assumed as much since we could see your boat anchored on the
+reef."
+
+"I told them about last night," Tony added.
+
+"Yes, and we sent a party of men to the house up the beach to capture
+these fancy frogmen of yours. The house was empty. Since their boat was
+tied up, we made a quick assumption that they were out on the reef with
+you. We did a fast run out ..."
+
+"And got the fright of our lives," Steve finished. "We knew there were
+three of the enemy and two of you down below, and we could see only
+three sets of bubbles. We thought you were done for."
+
+"It was remarkable the way Lieutenant Kelly and his men got ready to
+dive," Zircon said. "I've never seen people move so fast. Steve, too.
+Then, just as they were about to go over the side, we saw two more
+bubble trails and knew at least that you were still alive. But in a
+moment the entire pack of bubbles merged."
+
+"We hit the water," Jimmy Kelly said, "and were about to dive when one
+of the enemy skyrocketed up. He was blue in the face and scared witless.
+We hauled him out and then started to dive again. And along came Scotty,
+half dead and babbling about you. I started straight down to get you,
+but you met me halfway." He grinned. "You weren't in very good shape,
+either, for a few minutes."
+
+"How about the men? Where are they?" Scotty asked.
+
+"Down below. Locked up, with an armed guard at the door."
+
+Steve Ames finished his coffee and sat back with a sigh of satisfaction.
+"I'm happy," he announced.
+
+The boys grinned. He looked it.
+
+"Glad you wound this up so fast," Zircon boomed. "When will you return
+to Charlotte Amalie?"
+
+Steve looked at Jimmy Kelly. "You in a hurry?"
+
+"Not particularly. Now that this case is over we go back to some pretty
+dull routine. Why?"
+
+"Oh, I thought your boys might like a little recreation."
+
+Jimmy looked suspicious. "Any sailor likes recreation. The more the
+better. The UDTs enjoy it more than most. What's on your mind?"
+
+Steve's wave took in the four Spindrifters. "It wasn't their fault one
+of the gang talked his head off last night. If he hadn't, their work
+here would have given us a lead we couldn't have gotten in any other
+way. Suppose we repay 'em."
+
+Jimmy sighed. "Get to the point."
+
+"Keep the ship here tomorrow. Turn your boys loose to help find the
+treasure they're after. You've got equipment they need. Besides, I'm
+sure your gang can find some nice souvenirs if they put their minds to
+it. Old cutlasses, cannon, cannon balls--things like that."
+
+"It's a deal." The UDT lieutenant chuckled. "I'll try a little souvenir
+hunting myself. Of course, since it's unofficial, I'll have to ask for
+volunteers."
+
+"Think you'll get many?" Rick asked anxiously.
+
+Steve and Jimmy laughed. The lieutenant said with a chuckle, "If one of
+them doesn't volunteer I'll turn him over to the doctor, because I'll
+know he's sick. The UDT's volunteer because they like to swim. It isn't
+often they get a chance like this, to dive just for fun."
+
+"If we don't find the treasure," Scotty said with satisfaction, "it'll
+be because it isn't there!"
+
+
+
+
+CHAPTER XX
+
+The Buried Secret
+
+
+At first, the captured frogmen were defiant. They insisted that the Navy
+had nothing on them. The brass ball wasn't theirs. They were only sport
+divers having some fun.
+
+Then, faced with the unassailable fact that Rick had taken motion
+pictures of their activities, they lapsed into sullen silence and
+refused to talk.
+
+Rick and Scotty watched Jimmy Kelly check the diving equipment of the
+frogman teams lined up on the destroyer escort's deck. Beyond the teams
+they could see the three enemy frogmen, taking the air under the
+watchful eye of a shotgun-armed sailor.
+
+"I wonder if we'll ever get the full story," Rick mused.
+
+"We've got all we need," Scotty answered. "What pieces are missing?"
+
+"Well, I'm curious about the chicken. I think we hit it when we decided
+they wanted to scare us out of the octopus-cave area, but it would be
+nice to know for sure. And why did they take the sonar equipment to the
+eastern reef during the storm?"
+
+"Probably to make a recording as a routine check. They couldn't assume
+all sub activity was taking place to the west."
+
+"But how can we be sure?"
+
+"We can't. We can only try to figure out what happened, based on what
+information we have. For instance, there must have been a sonar unit
+near where we swam at St. Thomas. It's the only thing that could have
+got the shadow so excited. But what difference does it really make? We
+know most of the story, and we can guess the rest."
+
+"Steve may be able to fill in some pieces later," Rick observed. He
+liked to have a thing wrapped up neatly, with no loose ends hanging.
+Still, that was almost impossible in a case like this.
+
+Jimmy Kelly called, "You boys ready to go?"
+
+"Whenever you are," Rick called back. He picked up his heavy three-tank
+block from where it rested against the rail and handed it to Scotty.
+While his friend held the rig, Rick got into it. Then he performed the
+same service for Scotty. The tanks were heavy.
+
+Tony and Zircon, similarly equipped, came out of the amidships cabin
+with Steve Ames. Jimmy had loaned equipment from the frogmen's supplies,
+to enable the group to work around the wreck longer.
+
+The search party assembled on the landing stage. Jimmy had split his
+teams into two groups. They would dive in relays.
+
+"We'll look the situation over, then get to work," Jimmy instructed.
+"How many have wrecking bars?"
+
+Four of the UDT gang held them up.
+
+"All right. Turn and turn about. Work for ten minutes then pass them to
+your mates. Watch your hoses, especially when working inside. Okay.
+Let's go."
+
+They slipped into the water four at a time, Rick and Scotty in the first
+four. Once in the water, the weight of the heavy tanks vanished. The
+boys had removed weights from their belts to allow for the extra tanks
+and for more than ten additional pounds of air on the descent.
+
+A pair of frogmen payed out a heavy rope, taking the reel down with them
+in order to provide a direct link from wreck to ship. On the way up the
+divers would pause at knots in the rope to decompress, allowing time for
+compressed nitrogen to get out of their blood streams.
+
+With the boys and the scientists, Jimmy went over all visible portions
+of the wreck. He summed up his attitude with an elaborate shrug and
+spreading of his hands that said he didn't know where to begin. For his
+frogmen, he made a sweeping gesture that told them to tackle the wreck
+anywhere. The frogmen moved in, operating in pairs. The water clouded
+rapidly with silt, particles of marine growth, and fish eggs.
+
+The top of the captain's cabin came off. Rick swam in through the murk
+and picked up the chair that had seemed to be in good condition. He
+carried it to clear water and placed it on the sand. Now that it was out
+in the open, it could be seen that teredos--shipworms--had feasted on it
+and burrowed into it until it was nothing but a chair-shaped shell.
+
+The same was true of the cabin interior. It collapsed soundlessly under
+the prying bars of the frogmen. Under their enthusiastic attack the
+water was soon so roiled that visibility at the wreck was reduced to
+almost zero. Jimmy sounded the signal for ascent and the group surfaced
+without decompressing. They had just about exhausted a single tank.
+
+On the landing stage, the lieutenant said, "No use continuing until the
+water settles. Any ideas, Chief?"
+
+Sanders, the group's chief petty officer, replied, "I think we're going
+to need a sand hose, Sir. Most of the wreck is buried."
+
+Jonesy, a short, husky frogman with a bright-red crew cut, added, "Sir,
+I think the cannon and stuff would be on the deck ahead of the cabin we
+opened up, but the deck is under the sand. Could we rig a hose, Sir?"
+
+"Good idea. Put a detail to work, Chief."
+
+Sanders called out four names and issued instructions. Jimmy called a
+ten-minute break for the rest.
+
+During the break, Rick sought out Steve Ames. He commented, "You know,
+this wasn't a very well-organized gang. I keep thinking about the two
+who tried to get us at St. Thomas."
+
+Steve disagreed. "You're wrong. It was a _very_ well-organized gang.
+Their trouble was not enough trained agents. They had to hire extras,
+and the extras were just ordinary mugs, and not very bright ones. It was
+the mugs who made the mistakes, not the real agents."
+
+Jimmy Kelly spoke up. "Did we tell you? We got reports from the other
+UDT teams this morning. Our people have all the stations except one in
+British territory. Maybe our British cousins can get the station team
+for us. We've tipped them off."
+
+The lieutenant finished a glass of orange juice and rose. "Time's up.
+Let's get back to the wreck."
+
+Hobart Zircon asked, "Don't you want to take your camera, Rick?"
+
+"Good idea." He hurried to get it. One of the frogmen had picked it up,
+along with the rest of the equipment they had left behind.
+
+The water had settled enough for thorough inspection of the entire aft
+portion of the wreck. Rick and Scotty helped the frogmen poke into every
+possible place without finding more than a pair of rusted cutlasses.
+
+Rick surveyed the scene with discouragement. The statue was somewhere
+under the sand, which probably meant they would never find it. He had
+another sudden realization, too. They had no proof that this ship was
+the _Maiden Hand_, no proof that the whole business wasn't just a
+wild-goose chase.
+
+By the time the dive was over, the sand hose had been rigged. The first
+group surfaced and Jimmy ordered the fresh group of frogmen to hose out
+the aft cabins to find anything that might be left. Then the group was
+to start work on the probable location of the foredeck.
+
+During the rest period, Rick told Jimmy about the other wreck they had
+found, the modern ship that he guessed was a war casualty.
+
+"We'll take a look at it first thing in the morning before we shove off
+for St. Thomas," Jimmy promised. "You never know what you'll find in a
+wreck. We've found a lot of things worth salvaging."
+
+The boys were operating under Navy rules now. They put on fresh tanks
+and got their instructions from Chief Sanders. "Longer decompression
+this time. Stick with me on the way up and move when I move. We don't
+want you to get the bends."
+
+The boys nodded their understanding, then took to the water.
+
+The frogmen below were still hosing sand. Water forced at high pressure
+through the hose that ran down from the ship sent the stuff swirling in
+great clouds. The boys watched. They couldn't do much looking around
+until the water settled.
+
+Then they saw that the frogmen weren't waiting. They swam into the murk,
+feeling around with their hands. Rick saw one emerge triumphantly
+holding a round object that could only have been a cannon ball.
+
+He and Scotty plunged in, too. Working with the frogmen they rapidly
+assembled a treasure trove of cannon, more cannon balls, cutlasses still
+in good condition, and useless ship's gear.
+
+Fifteen minutes later a frantic hooting brought them in a rush to where
+Jonesy was holding something. Zircon and Tony got there at the same
+time, and soon all work had ceased while Jonesy's find was examined.
+
+Tony took his belt knife and scraped. Then he looked around at the
+watching group and nodded. He clasped his hands together and shook them
+like a fighter mitting the crowd.
+
+Rick and Scotty hooted their triumph. Jonesy had found the statue of St.
+Francis!
+
+The boys, the scientists, Steve, and Jimmy carried the treasure to the
+surface. The rest of the frogmen continued hunting for souvenirs.
+
+On the landing stage they put the statue down with loving care. Even
+under the marine growth they could make out the cowled figure of the
+sainted monk, head bent over the fawn he held in his arms.
+
+Tony went to work. Soon there was a gleam of gold that brought a yell of
+triumph from the boys. Then--amazingly--the gleam of dull silver.
+
+"Hobart, look at this!" Tony exclaimed.
+
+The big scientist knelt and examined the silvery streak. He borrowed
+Tony's knife and probed, then his laugh boomed across the water.
+
+"We are the victims of our own research!" he roared. "All this
+trouble--over a statue of lead!"
+
+"Lead!" Rick stared incredulously. This couldn't be true! "There's gold,
+too," he pointed out.
+
+"Apparently gold leaf over a lead base," Tony said with a sigh. "No,
+Rick. Hobart is right. This is lead."
+
+A call from the water made them look up. Chief Sanders and his diving
+buddy had surfaced, and they were carrying a statue of St. Francis!
+
+Behind them, another pair of frogmen, with still another statue!
+
+Within a half hour there were no less than eight identical statues lined
+up on deck. St. Francis, in lead, repeated eight times.
+
+Scotty scratched his head. "Well," he said finally, "we certainly found
+St. Francis! In fact, we overdid it a little."
+
+Not until long afterward did they learn the answer. Tony Briotti, a
+scientist of great persistence, did some research in England during a
+European trip to attend a conference of archaeologists. He found that
+the _Maiden Hand_ had carried several dozen St. Francis statues, for
+sale to churches and individuals in the New World. Captain Campion had
+considered only one special enough to mention, because it had been
+blessed by the Cardinal of France and entrusted to his care for delivery
+to the Governor of Barbados.
+
+The Spindrifters took one statue as a gift for Barby. A cutlass was
+Rick's share of the loot, while Tony took the bar shot they had found
+near the wreck and Zircon selected a cannon ball. It was understood that
+the knife Scotty had found was to be his, so that he could present it to
+Hartson Brant.
+
+A few quick dives the following morning disclosed nothing of interest
+around the first wreck they had found, but Jimmy identified it as a
+common type of small cargo vessel. Then the destroyer escort sailed for
+St. Thomas.
+
+Before it left, there was time for a few words with Steve Ames.
+
+"I'm leaving St. Thomas by air tonight for Washington," he reported.
+"Something new has come up and I'm needed. I may need you, too, before
+this case is over. The report wasn't detailed, but it carried a few
+implications that have me worried."
+
+"We'll be ready if you need us," Rick assured him.
+
+Steve's warm smile flashed. "I know," he said. "I'll see you soon."
+
+
+
+
+The RICK BRANT SCIENCE-ADVENTURE Stories
+
+BY JOHN BLAINE
+
+SCIENCE-ADVENTURE STORIES
+
+[Illustration: RICK BRANT]
+
+Rick Brant is the boy who with his pal Scotty lives on an island called
+Spindrift and takes part in so many thrilling adventures and baffling
+mysteries involving science and electronics. You can share every one of
+these adventures in the pages of Rick's books. They are available at
+your book store in handsome, low-priced editions.
+
+THE ROCKET'S SHADOW
+
+THE LOST CITY
+
+SEA GOLD
+
+100 FATHOMS UNDER
+
+THE WHISPERING BOX MYSTERY
+
+THE PHANTOM SHARK
+
+SMUGGLERS' REEF
+
+THE CAVES OF FEAR
+
+STAIRWAY TO DANGER
+
+THE GOLDEN SKULL
+
+THE WAILING OCTOPUS
+
+THE ELECTRONIC MIND READER
+
+THE SCARLET LAKE MYSTERY
+
+THE PIRATES OF SHAN
+
+THE BLUE GHOST MYSTERY
+
+THE EGYPTIAN CAT MYSTERY
+
+THE FLAMING MOUNTAIN
+
+
+
+
+
+End of Project Gutenberg's The Wailing Octopus, by Harold Leland Goodwin
+
+*** END OF THIS PROJECT GUTENBERG EBOOK THE WAILING OCTOPUS ***
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