<h2 id="c11">CHAPTER XI <br/><span class="small">“POP! GOES OUR MYSTERY!”</span></h2>
<p>Before the lowered landing wheels of the
amphibian touched the private landing field,
after a flight delayed by the need of more fuel,
Larry saw his chums waiting by the hangar.</p>
<p>As the aircraft taxied to the end of the runway
he saw that their expressions were doleful.</p>
<p>“Bad news?” Larry asked, climbing to the
turf.</p>
<p>“Our adventure is over and done with,” Dick
said. “It has gone ‘poof’ like a bursted soap
bubble.”</p>
<p>“But Jeff and I have caught the man who was
with the one claiming to be Mr. Everdail——”</p>
<p>“Claiming to be,” Sandy said disgustedly. “I
was wrong. He <i>is</i> Mr. Everdail.”</p>
<p>“How did you find out?”</p>
<p>“He came back, Larry.” Dick chuckled.</p>
<p>“Came back? I thought——”</p>
<div class="pagenum" id="Page_96">96</div>
<p>“He wrote the note for Jeff, and then called
up the hospital where the pilot was taken,” Dick
stated. “They said the man seemed to be coming
out of his sleep and Mr. Everdail went out
to the road while we weren’t especially watchful,
and got a passing car to take him to the next
village. Then he took a taxi to the hospital.”</p>
<p>“And what he heard there made him come
home,” Sandy added.</p>
<p>“What did the pilot say?”</p>
<p>“You recall what you thought was part of a
word?”</p>
<p>“Yes, Dick—the beginning of ‘Gaston,’ we
thought.”</p>
<p>“Larry—it was a whole word.”</p>
<p>“Gast?——”</p>
<p>“It sounds the same, but if I spell it you’ll
see.”</p>
<p>Slowly he spelled a word of six letters.</p>
<p>“G-a-s-s-e-d.”</p>
<p>“Gassed?”</p>
<p>“Carbon monoxide—deadly fumes that blew
in from the exhaust of the engine—it was an
old crate, and the engine didn’t have perfect
combustion, he said,” Sandy gave the explanation.</p>
<div class="pagenum" id="Page_97">97</div>
<p>“The direction they flew,” Dick added, “across
the wind—the fumes blew into his cockpit. It
was set low, you know. Well, before he knew
what was what, he felt himself going. Then he
thought he could snap out of it, loosened his
safety belt, tried to lift himself for a breath of
pure air—the seaplane dived, and he fell against
something that knocked him out!”</p>
<p>“Then the passenger didn’t——”</p>
<p>“No. He didn’t throw anything. The pilot
explained all that,” Dick said, while Jeff formed
an interested fourth of the group. “You recall,
Jeff, the captain of the yacht took out extra
insurance on the emeralds?”</p>
<p>“I remember that, too,” Larry said.</p>
<p>“The English company became suspicious,”
Dick went on. “They sent a man—we’ve called
him ‘the passenger’—to this side, suspecting
that some effort was on foot to hide the gems
or get rid of them till the insurance was paid—it’s
a trick that has been worked.”</p>
<p>“I begin to understand,” said Larry. “The
man from England hired the stunt pilot to fly
him out to meet the yacht—but how did he know
when it would arrive?”</p>
<p>“Can’t you guess?”</p>
<p>“I can,” said Jeff. “That English fellow was
that-there ‘spook.’ Maybe he ‘listened in’ on
the short wave set in the big house yonder.”</p>
<p>“That’s probably it,” Dick retorted. “Anyway,
he flew out, and when he saw the amphibian
and the small hydroplane and our airplane,
he jumped to the idea that either one or more
gangs of robbers had somebody on the yacht to
get the jewels and throw them out, or else——”</p>
<div class="pagenum" id="Page_98">98</div>
<p>“Wait!” urged Larry. “How does the gum
fit in with that?”</p>
<p>“That’s so,” said Dick. “Let’s go up to the
house and see what Mr. Everdail says.”</p>
<p>“If he is Mr. Everdail, after all,” Larry said.</p>
<p>“Oh, his wife would know any impersonator,”
argued Dick. “So will Jeff.”</p>
<p>“That’s so. Come on.”</p>
<p>That the millionaire was genuine, “in person
and not a caricature,” as Dick put it, was evident.
Both the nurse, his relative, and his wife,
were chatting with him as Jeff delivered the
heavy packed ball made up of the gum.</p>
<p>“How about this-here?” he asked. “How does
this fit in?”</p>
<p>“That’s simple enough,” responded the rich
man, breaking the exhibit into its separate
pieces. “The special agent from England, watching
here, had seen Jeff making his nightly hops
over from the airport. He thought, quite naturally,
Jeff was working with some jewel robbers.”</p>
<p>“That doesn’t explain this-here gum,” objected
Jeff.</p>
<div class="pagenum" id="Page_99">99</div>
<p>“This will. The agent from London thought
it likely that some attempt would be made to
get the jewels. He proposed to see whether it
would be made by professionals or by some one
working for me. He thought my wife or I had
the intention of robbing ourselves—making the
gems disappear until we could collect the insurance.
When he couldn’t make up his mind which
was most likely—professionals or amateurs
hired by us—he thought of trying to get the
jewels—and that meant——”</p>
<p>“A safe hiding place if he was followed, until
he could get to a vault and notify his firm,”
Sandy broke in, eager to declare how mistaken
he had been by giving the true facts.</p>
<p>“And how about the man who was with you?”
Larry turned to Mr. Everdail, while Mrs. Everdail
with a little grimace of disgust, drew
Sandy’s first discovery of the gem in the gum
closer to look at.</p>
<p>“He’s one of my divisional managers in the
transcontinental tourist airlines,” stated the
millionaire.</p>
<p>“Then we’d better get him off that wrecking
tug,” and Larry gave the story of the man’s
appearance and capture, giving Jeff the credit
which Jeff, generously and promptly, returned
to him with interest.</p>
<div class="pagenum" id="Page_100">100</div>
<p>“Well,” concluded Mr. Everdail, “here are
the emeralds, minus the chain, which can easily
be duplicated. And you know who’s who, and
why the hangar seemed to be haunted, and all
about the gum. Is there anything you don’t
understand?—before Larry starts taking flying
instructions from Jeff and you others join my
wife and I for a cruise to Maine where I will
leave Mrs. Everdail.”</p>
<p>“Yes, sir,” Larry responded. “We saw that
parachute the man in the seaplane had come
down with—the harness was unbuckled, so he
wasn’t hurt in the drop. What I want to bring
up is this: why did he desert the stunned pilot—and
not appear when we landed there?”</p>
<p>“I wonder,” the millionaire was thoughtful.
“I wonder what you would do if you had to
make a ’chute jump and then, after the excitement
discovered that the pilot was ‘out’ and had
a blow on the temple—and with concealed jewels
in his cockpit——”</p>
<p>“Guess I’d hide too!”</p>
<p>“But why were the chunks of gum put in the
pilot’s cockpit and not in the passenger’s?”
Larry persisted.</p>
<p>“You’re getting worse than I am,” grinned
Sandy.</p>
<div class="pagenum" id="Page_101">101</div>
<p>“The passenger was not an aviator,” the rich
man retorted soberly. “He put them where he
thought he would sit—in the wrong place, it
happened. So, when they got the jewels, it
was simpler to put them where the pilot could
hide them, where the gum was.”</p>
<p>“Another reason would be,” Jeff said, “pilots
use gum and it would look more natural for it
to be stuck around where he did his control job
than up forward, where the special agent had
it in the amphibian.”</p>
<p>“That’s all that bothered me,” admitted
Larry.</p>
<p>“And Pop! goes our mystery,” chuckled Dick.</p>
<p>Mrs. Everdail bent forward, and then looked
up sharply.</p>
<p>“I don’t know about that?” She turned to her
husband.</p>
<p>“Atley,” she said, excited and nervous. “Look
here!” The man almost raced around the library
table, bending close to where her finger touched
the dark green showing through the adhesive
gum.</p>
<p>“I don’t see anything—out of the way,” he
replied to her look.</p>
<p>The Sky Patrol saw her expression and each
grew taut with excitement at her next words.</p>
<p>“Don’t you see? Can’t you?” She raised
her voice to a shrill pitch of excitement.</p>
<p>“I see one of the emeralds——”</p>
<p>“Don’t you see that it is pitted—burned—by
acid?”</p>
<div class="pagenum" id="Page_102">102</div>
<p>“Glory-gracious-golly!” Larry was agitated
enough to couple all the exclamations.</p>
<p>“This isn’t the Everdail Emerald,” the lady
was almost screaming, her hands trembled as
she pointed. “It is the emerald that I had in
the hotel room——”</p>
<p>“The imitation!”</p>
<p>“Yes, Atley! Oh——”</p>
<p>Dick turned to Larry.</p>
<p>“I just said, ‘Pop! goes our mystery.’” He
had to laugh in spite of the grave situation, the
new development, as he added:</p>
<p>“Well—‘Pop!’ Here comes our mystery back
again!”</p>
<p>“Bigger than ever!” agreed Larry.</p>
<p>For once Sandy was absolutely speechless.</p>
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