<h2><SPAN name="CHAPTER_VII" id="CHAPTER_VII"></SPAN>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—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>
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