<h2 id="c4">CHAPTER IV <br/><span class="small">MYSTERY OVER THE OCEAN</span></h2>
<p>Three youths, thrilled by the prospect of a
mysterious adventure, and a war pilot, intent
on a friendly service, discussed plans for protecting
the Everdail Emeralds.</p>
<p>“I don’t see how anything can slip up,” Larry
gave his opinion.</p>
<p>“I don’t know,” Jeff spoke dubiously, uncertainly.
“We’ve gone over all the things we can
think of that might go wrong—but——”</p>
<p>“But—what?” demanded Dick.</p>
<p>“I had a fortune teller read the cards for me,”
Jeff told him. “The nine o’ spades—the worst
card of warning in the pack—was right over me
and that means trouble—and the ace of spades,
a bad card——”</p>
<p>“Crickety-Christmas!” Larry was amazed.
“Are you really telling us you believe in all
that?”</p>
<p>“I’ve seen that-there card fortune work out
before.”</p>
<p>“You’ve twisted things that happened to fit
what you wanted to believe,” argued Larry.</p>
<div class="pagenum" id="Page_31">31</div>
<p>“Oh, well,” Jeff did not want to discuss his
superstitions, “maybe it won’t come out so bad.
I met a pair of colored twins yesterday. That’s
a good-luck sign——”</p>
<p>“Look here!” Dick began to chuckle. “We’ve
got a queer combination to work with—our Sky
Patrol has! Suspicious Sandy—and—Superstitious
Jeff!” Sandy grinned ruefully, a little
sheepishly. Larry smiled and shook his head,
warning Dick not to carry his sarcasm any
further, as Jeff frowned.</p>
<p>“How will you know when the yacht is due?”
Larry asked.</p>
<p>“I fixed up Atley’s old short-wave radio, in
the old house—and I’ve been getting dope from
the yacht the last couple of nights. In about an
hour we’ll take off, fly out beyond the lighthouse
and patrol.”</p>
<p>“Will you have enough gas?” Larry inquired.</p>
<p>“Had some delivered in cans early this morning—down
at the boathouse,” Jeff told him.
“We can fill up the main tank and get a reserve
in my small wing-tanks—enough for ten hours
altogether.”</p>
<p>“Let’s get busy!” urged Sandy.</p>
<p>The three comrades were busy from then on.</p>
<div class="pagenum" id="Page_32">32</div>
<p>Only when Jeff was warming up the engine,
checking carefully on his instruments, taking
every precaution against any predictable failure,
was there time for a moment together and
alone.</p>
<p>“Now what do you think of your suspicions?”
Dick demanded. Sandy shook his head.</p>
<p>“Most of the time I think I was letting imaginitis
get the best of me—but every once in
awhile I wonder—for one thing, why doesn’t the
yacht sail right on to the New York wharf and
let the captain take those emeralds to safe deposit?”</p>
<p>“Golly-to-goodness, you’re right, at that!”
Larry nodded his head.</p>
<p>“For another thing,” Sandy went on, “anybody
could write that letter Jeff showed me—and
who is Jeff, when all is said and done?”</p>
<p>“Oh, I think he’s all right,” argued Larry.</p>
<p>“Well, then, let that go. But—he chews gum
and there’s gum stuck all over in this amphibian—he’s
been here, nights——”</p>
<p>“Suspicion may be all right,” Larry commented,
“but what does it bring out, Sandy?
What is your idea——”</p>
<div class="pagenum" id="Page_33">33</div>
<p>“This is my idea! Nothing is what it seems
to be. Jeff pretends to be a joy-ride pilot, but
he never takes up passengers—hardly ever. The
engine dies, only it’s Jeff stopping the ‘juice.’
This old amphibian crate looks as though it’s
ready to come to pieces and yet, somebody has
been working on it—that chewing gum wasn’t
stale and hard, because I made sure. Well—suppose
that Jeff was in a gang of international
jewel robbers——”</p>
<p>“Next you’ll be saying the letter was in a
registered envelope from California and was
written in Cairo!” laughed Dick.</p>
<p>“Or in New York!” corrected Sandy meaningly.</p>
<p>“Jewel robbers,” Larry was serious. “I don’t
think that holds water, Sandy. First of all, Jeff
claims to know that the emerald imitations had
acid poured on them—acid to destroy them.
That must be some chemical that corrodes or
eats emeralds. Now, robbers wouldn’t——”</p>
<p>“Why not?” Sandy was stubborn. “Suppose
they had gone to all that trouble to get into the
suite and discovered the false emeralds? What
would you do?”</p>
<p>“I might rip them apart—but do you think
robbers carry acids along to eat up emeralds if
they think they are going to profit by taking
them?”</p>
<div class="pagenum" id="Page_34">34</div>
<p>“Suspicious Sandy,” Dick began to chant a
rhyme he invented on the spur of the moment,
“Suspicious Sandy, Suspicious Sandy, he thinks
everything is like April-Fool candy! Nothing
is what it seems to be and soon he’ll suspect
both Larry and me!”</p>
<p>Sandy turned away, hurt, and strolled to the
amphibian with its retractable wheels for land
use and its pontoons for setting down on water.</p>
<p>Jeff called and signaled that all was ready.
Larry summoned Sandy but the latter lingered,
while Dick, a little sorry he had taunted so
much, followed Larry toward the waiting airplane.
But Sandy, scowling, hesitated whether
he would go or be angry and refuse to join the
Sky Patrol. Then, as he clambered onto the forward
bracing of the under wing and leaned on
the cockpit cowling, his face assumed a startled,
intent expression.</p>
<p>There was no chewing gum in the craft!</p>
<p>His first impulse was to rush out and declare
his discovery.</p>
<p>His next was to keep silent and avoid further
taunting.</p>
<p>“Jeff chews gum,” he mused. “He pretended
not to know any was in this amphibian. But it’s
gone! Well,” he told himself, “I’ll watch and see
what he’s up to. He’ll give himself away yet!”</p>
<div class="pagenum" id="Page_35">35</div>
<p>Assuming an air of having forgotten all about
Dick’s rhyme, he went to his place in the seat
behind Jeff and the instant his safety belt was
snapped Jeff signaled to a farmer who had
come over to investigate and satisfy himself
that the airplane had legitimate business there;
the farmer kicked the stones used as chocks
from under the landing tires and Jeff opened
up the throttle.</p>
<p>With wind unchanged the trees which had
complicated their landing were behind them.
Jeff’s only problem, Larry saw, was to get the
craft, heavier with its wing tanks full, off the
short runway and over the hangar.</p>
<p>“If he gets a ‘dead stick’ here,” Larry mused,
“it will be just too bad!”</p>
<p>He had no trouble lifting the craft and flying
for seconds just above the ground to get flying
speed after the take-off, then giving it full gun
and roaring up at a safe angle to clear the obstruction.</p>
<p>“We’re off!” exulted Dick.</p>
<p>They were—off on an adventure that was to
start with a mad race and terminate—in smoke!</p>
<p>Down the backbone of Long Island, not very
high, they flew. The farms, landscaped estates
and straight roads of the central zone were in
striking contrast to the bay and inlet dented
North Shore with its fleets of small boats, its
fishing hamlets, rolling hills and curving motor
drives and the seaside with its beach resorts,
yellow-brown sand and tall marsh grass clustered
between crab-infested salt water channels.</p>
<div class="pagenum" id="Page_36">36</div>
<p>Passing over the fashionable Summer homes
of wealthy people at Southampton, they held
the course until Montauk Point light was to the
left of the airplane, then Jeff swung in a wide
circle out over the desolate sand dunes, the
ooze and waving eel-grass of marshes and the
tossing combers of the surf.</p>
<p>“There’s the hydroplane!” Dick, leaning over
the left side, made a pointing gesture. Larry,
watching seaward, had not been looking in the
right direction. Sandy, alert to pass signals,
touched Jeff and received a nod from the pilot.</p>
<p>The first step of the plan was taken. They
had made contact with the small, speedy craft
which, on a later signal that they had “picked
up” the incoming yacht, would speed out to
sea to meet her.</p>
<p>“Now we’ll climb!” decided Sandy.</p>
<p>Climb they did, until the sea dropped down to
a gray-green, flat expanse and only the powerful
binoculars Larry was using could pick out
the cruising hydroplane slowly verging away
from the shore in an apparently aimless voyage.</p>
<div class="pagenum" id="Page_37">37</div>
<p>“This isn’t such a bad scheme, at that,” Dick
concluded mentally. “If there should be anybody
on the lookout—robbers or somebody who
wants to see what’s going on—no one will see
any connection between us passing here and then
climbing to get a good wind for a run down the
coast toward Maine, and a hydroplane that’s
acting as if it had some engine trouble.”</p>
<p>Higher and higher they went, probably out
of sight of anyone without strong field glasses,
and while they swung in a wide circle, Larry’s
binoculars swept the horizon.</p>
<p>“Smoke!” He turned the focusing adjustment
a trifle. “Too soon to signal—it may be an
oil-burning steamer and not the yacht—or a
rum-runner of a revenue patrol—it’s thick,
black oil smoke, the sort the yacht would give—it
is a small boat—yes——”</p>
<p>His signal, relayed through Dick and Sandy
to Jeff, shifted the gently banked curve into
a straighter line and swiftly the lines of the oncoming
craft, miles away, became clear.</p>
<p>Larry verified his decision that the low, gray
hull, with its projecting bowsprit, the rakish
funnel atop the low trunk of the central cabin,
and the yacht ensign, identified the <i>Tramp</i>.</p>
<p>The signal went forward.</p>
<p>Jeff, glancing back, caught Sandy’s nod.</p>
<p>“Now we’ll dive to where the hydroplane can
see us, and the dive will signal the yacht that
we’re the airplane they’ll be watching for,” Dick
decided.</p>
<div class="pagenum" id="Page_38">38</div>
<p>The maneuver was executed, ending in a fairly
tight circle after Jeff had skilfully leveled
out of the drop.</p>
<p>“Smoke was trailing over the yacht’s stern,”
Sandy murmured. “Now it’s blowing off to the
starboard side. She’s swinging toward us.”</p>
<p>Through his glasses Larry saw the hydroplane
awaken the sea to a split crest of foam,
saw a cascade of moiling water begin to chase
her, and knew that the tiny craft was racing
out to the meeting.</p>
<p>“All’s well!” he grinned as Dick looked back.</p>
<p>Dick nodded and passed the report to Sandy.</p>
<p>Sandy did not smile. Instead, as they swung,
he scanned the sky. That was not his instructions,
but it was his determined plan.</p>
<p>“I’ll see the amphibian Jeff was working on,
nights,” he mused. “It ought to be in sight
now——”</p>
<p>Convinced that both the hydroplane and the
yacht would have located the spot on the sea
where they would meet, Jeff broke the tedium
of his tight circle by a reverse of controls, banking
to the other side and swinging in a climbing
spiral to the right.</p>
<p>Closer and closer together came the swift turbine
propelled yacht and the surface-skimming
hydroplane.</p>
<div class="pagenum" id="Page_39">39</div>
<p>“I was right!” shouted Sandy, unheard but
triumphant—and also a little startled that he
had so closely guessed what would happen.</p>
<p>He swung his head, signaled Dick, waved an
arm, pointing. Dick and Larry stared, while
Sandy poked Jeff and repeated his gestures.</p>
<p>On the horizon, coming at moderate speed,
but growing large enough so that there could be
no error of identification, came the amphibian.
Its dun color and its tail marking were unmistakable.</p>
<p>“The amphibian!” cried Larry. “I wonder
why——”</p>
<p>“I wonder who’s in it?” Dick mused as Jeff
cut the gun and went into a glide, the better to
get a look at the oncoming craft low over the
seashore.</p>
<p>Larry realized with a pang that he was neglecting
Jeff’s plan.</p>
<p>He looked down.</p>
<p>No glass was needed to show him the yacht,
swiftly being brought almost under them by its
speed and theirs. A quarter of a mile away was
the hydroplane, coming fast. A mile to the
south flew the approaching amphibian. And in
every mind—even Jeff’s, had they been able to
read it—was the puzzled question, “Why?”</p>
<div class="pagenum" id="Page_40">40</div>
<p>Jeff began to climb in a tight upward spiral
to keep as well over the scene of activity as he
could without being in the way.</p>
<p>“And to be high enough to interfere if something
has slipped,” Larry decided on the purpose
in Jeff’s mind. Then, as the amphibian
came roaring up a hundred yards to their left,
and in a wide swing began to circle the yacht,
Sandy screeched in excitement and pointed
downward.</p>
<p>“Something’s happening!” he screamed.</p>
<p>Swiftly Larry threw his binoculars into focus
as he swept the length of the yacht to discover
what caused Sandy’s cry, for with a wing in his
way he did not see the stern. They swung and
he gave a shout of dismay and amazement.</p>
<p>“Somebody’s overboard!”</p>
<p>Instantly he corrected himself.</p>
<p>“No—but there’s a life preserver in the water—it
was thrown over but the yacht isn’t stopping.”
His glasses swept the bridge, the deck.</p>
<p>“No excitement—now, I wonder——”</p>
<p>The lenses brought the stern and after cabin
into view.</p>
<p>Turning away, back to his view, in a dark
dress, a woman who had been at the extreme
after rail was racing out of sight behind the
cabin.</p>
<div class="pagenum" id="Page_41">41</div>
<p>“There’s a life preserver in the water!” Dick
could see it without glasses. Sandy looked.</p>
<p>“The amphibian is making for it!” he yelled.</p>
<p>“The hydroplane can’t get there in time!”
shouted Larry.</p>
<p>None of them realized that Jeff’s roaring engine
drowned their cries.</p>
<p>“Jeff! Look——” Wildly Sandy gesticulated.</p>
<p>Fast and high, in a swift glide, coming like
a hawk dropping to its prey, a light seaplane,
skimming the edge of an incoming fog bank,
showed its slim, boatlike fuselage and wide
wingspan, with two small pontoons at wingtips
to support it in the surf.</p>
<p>There was a swift drop of their own craft as
Jeff dived, came into a good position and
zoomed past the yacht, close to it.</p>
<p>Wildly, as those on the bridge came into clear
view, Sandy, Larry, Dick and Jeff gesticulated,
pointing astern. Bells were jangled, the yacht
was sharply brought up by reversed propellers
and a tender was swiftly being put down from
its davits, an excited sailor working to start its
engine, even as it was lowered.</p>
<p>Then, helpless to take active part because
they had no pontoons, the Sky Patrol witnessed
the maddest, strangest race staged since aviation
became a reality. And the prize? A mysteriously
flung life preserver!</p>
<div class="pagenum" id="Page_42">42</div>
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