<h2>CHAPTER XI</h2>
<h3>THE CIPHER</h3>
<p>"Locked!" exclaimed Betty, laconically, when she had tried the cover of
the box.</p>
<p>"Oh, dear!" came petulantly from Grace. "Isn't that horrid!"</p>
<p>"Well, I suppose the men have a right to lock up their treasure," coolly
remarked Betty, again vainly trying to raise the cover.</p>
<p>"You will have it that those men hid the box," said Amy, with a smile.
"Also that it is treasure."</p>
<p>"I'm getting romantic—like Grace," commented the Little Captain.</p>
<p>Then, as they found that their efforts to open the box were vain, the
girls looked at it more closely.</p>
<p>It was a black japanned box of tin, or, rather, light sheet iron, rather
heavier than the usual box made for holding legal papers. It was such a
receptacle as would be described, in England, as a "dispatch box." And
in fact, the box did<span class="pagenum"><SPAN name="Page_82" id="Page_82">[82]</SPAN></span> seem to be of some foreign make. It was not like
the light tin affairs used locally to hold deeds, insurance policies and
the like.</p>
<p>The cover fitted on tightly. This much was seen at a glance, and so well
did it fit that it needed a second look to make sure which was the
bottom and which the top, for there was no bulge or "shoulder" of the
metal to indicate where the lid rested.</p>
<p>"It's water-tight, I'm sure," Mollie said, when the box had again been
set upright. They decided that the top was that place where the initials
"B. B. B." showed, half-obliterated, in white paint.</p>
<p>"Then it might have been washed ashore from some wreck," Amy said.</p>
<p>"Too heavy to float," was the answer of Mollie, as she again lifted it.</p>
<p>"But it could work up in a heavy wind or sea; that is, if it didn't go
down too far from shore," Grace remarked. "But can't we get it open some
way?"</p>
<p>"We might break it," Mollie observed. "Otherwise, I don't see how we
can. It is a complicated lock, if I am any judge," and she looked at the
front of the box. "Let me take that stake, Amy."</p>
<p>"Oh, no! Don't break it open!" expostulated<span class="pagenum"><SPAN name="Page_83" id="Page_83">[83]</SPAN></span> Betty. "We must try and see
if we can't slip the lock, after we get it home. Papa has a lot of odd
keys."</p>
<p>"But I don't see any lock!" exclaimed Grace.</p>
<p>"There it is," and Betty pushed to one side a round disk of metal that
fitted over the keyhole.</p>
<p>Whether this was to keep out sand or water, the girls could not
determine. It might even have been designed to hide the keyhole, but
former use, or the battering which the box had received, had loosened
and disclosed the metal slide, and Betty's quick eyes had discerned the
object of it.</p>
<p>"It would take a peculiar key to open that," decided Mollie. "Mamma has
a historic French jewel case home, and it has a lock something like
that."</p>
<p>"Oh, suppose this contains—jewels!" cried Grace. "Wouldn't it be
just—"</p>
<p>"Nonsense!" broke in Betty. "If the box contains anything at all it is
probably papers of no value. My own opinion is that there's nothing in
it, for it's too light. However, we'll take it home, and see what the
boys say."</p>
<p>"You seem to have a great deal of faith in their opinion," laughed
Mollie. "Ah, my dear!" and she put a finger on Betty's blushing cheek.
"Methinks it is the opinion of <i>one</i> certain boy you want."<span class="pagenum"><SPAN name="Page_84" id="Page_84">[84]</SPAN></span></p>
<p>"Silly!" murmured Betty.</p>
<p>"Oh, don't mind us. A legal opinion would be most excellent to have,"
mocked Grace. "Now who is eating the chocolates?" she wanted to know.</p>
<p>Betty did not answer. She bent over the black box, with its indefinable
air of mystery, and the three queer letters on the top. She was,
seemingly, trying to find a way to open it.</p>
<p>Finally she straightened up, looked once more across the bay and said:</p>
<p>"Well, let's take it to Edgemere."</p>
<p>"And let's hurry, too!" urged Amy.</p>
<p>"Hurry? Why?" asked Grace. "There's no more danger from the storm."</p>
<p>"No, but those men might come back, and, finding their treasure
gone—oh, well, let's hurry," she finished.</p>
<p>"Don't make me nervous," begged Grace, with a glance over her shoulder.
"Come along, Betty. I'm just dying to see what is in it. But I'm not so
sure those men in the boat left it, and if they demand it don't you give
it up to them."</p>
<p>"Oh, I should say not!" cried Mollie, bristling a bit. "<i>We</i> found the
box. They'll have to prove ownership."</p>
<p>Betty tucked the box under her arm. No one disputed her right to carry
it, for the other girls<span class="pagenum"><SPAN name="Page_85" id="Page_85">[85]</SPAN></span> deferred to the Little Captain in matters of
this sort.</p>
<p>"Won't the boys be surprised when they see it!" commented Amy.</p>
<p>"But listen!" cautioned Betty. "We mustn't pretend that we think there
is anything in it. If we do, and there isn't, they'd have the laugh on
us."</p>
<p>"Oh, of course," assented Grace. "We'll just say we found the box on the
beach, and couldn't open it. The boys will be anxious enough to do
that."</p>
<p>And, sure enough, when the girls reached the cottage, the boys being not
far behind them, the latter were even more eager than Betty and her
chums to have a look inside the mysterious iron case.</p>
<p>"Pry the cover off!" cried Will, when he and the others had briefly
related their experience in saving their motor boat and sailing back in
the other craft, while the girls gave their story bit by bit, from the
sighting of the men in the boat, to the finding of the box. Only Betty
said nothing about the faces at the window of the fisherman's hut.</p>
<p>"Pry the cover off!" cried Will. "An axe is the best thing to use!"</p>
<p>"Indeed not!" exclaimed Betty. "Let's see if<span class="pagenum"><SPAN name="Page_86" id="Page_86">[86]</SPAN></span> we can't open it with a
key. You have some odd ones; haven't you, Daddy?"</p>
<p>"Yes," assented Mr. Nelson, who was down at the shore for the week-end.
"Betty, get them. You'll find them in that desk in the living room."</p>
<p>Betty's father had looked at the box on all sides, had shaken it, and
had examined the lock through a reading glass.</p>
<p>"It sure is a find, all right!" declared Roy Anderson. "I wish I had
been with you."</p>
<p>"Oh, if it's a treasure-trove, we'll all share, as they did in Treasure
Island," declared Betty, who was almost a boy in her liking for
adventure stories.</p>
<p>"Ahem!" exclaimed Allen Washburn, with an elaborate assumption of
dignity. "Treasure, you know, is subject to the claim of the
commonwealth, if the lawful heirs cannot be located. I must look up the
law on that subject."</p>
<p>"More likely it's the spoil of pirates, and fair booty for whoever finds
it!" declared Will. "I think I'm the proper one to take charge of this,
representing as I do the United States Government, which takes
precedence over any State commonwealth."</p>
<p>"Go on!" laughed Henry Blackford. "You'll be saying next that it's
smugglers' booty, and you'll be asking us to pay a duty on it. Let's<span class="pagenum"><SPAN name="Page_87" id="Page_87">[87]</SPAN></span>
open the box and see what it is—maybe nothing but seaweed. I've heard
of jokes being played before," and he looked at the girls meaningly.</p>
<p>"Oh, <i>we</i> didn't hide it and then find it again," Amy assured him, so
earnestly that the others laughed.</p>
<p>"Well, here goes for a try, anyhow," said Mr. Nelson.</p>
<p>With a bunch of assorted keys he tried one after another in the strange
lock. Some keys would not even enter the aperture, while others turned
uselessly around in it.</p>
<p>Betty's father used all he had without success, and then the boys were
called on. They were not able to produce the Sesame to the japanned box,
and Will's plan of using an axe was finding more favor when Allen
produced a small key of peculiar make.</p>
<p>"Try this," he said. "It locks the switch on the motor boat, but it may
fit. It looks as though it would."</p>
<p>And, to the surprise of them all, it did. As though it had been made for
that lock, the little switch key slipped in. There was a click, a
grinding sound, as the cover slipped on the sand-encrusted hinges, and
the lid went back.</p>
<p>"Stung!" cried Roy, as nothing was seen but a slip of paper within the
black interior.<span class="pagenum"><SPAN name="Page_88" id="Page_88">[88]</SPAN></span></p>
<p>Mr. Nelson lifted it out.</p>
<p>"I can't make anything of this," he said. "It's some sort of a note,
written in cipher, I should judge. It is signed 'B. B. B.'"</p>
<p>"The same letters that are on top of the box," said Allen.</p>
<p>"Was there ever a pirate who had those initials?" asked Mollie, and the
others laughed. "Well, there might have been," she went on. "I don't
think it's so funny."</p>
<p>"Of course it isn't, dear," declared Betty. "I guess we're all a bit
nervous. Is that all there is, Daddy?"</p>
<p>"Everything, my dear. The box is empty save for this bit of paper that
doesn't make any sense."</p>
<p>"We must translate that at once, sir," said Allen. "If it is in cipher
that's all the more evidence that it means something. I might have a try
at that secret message, or whatever it is."</p>
<p>"Well, you're welcome to have a go at it," assented Mr. Nelson. "It may
all be a joke, so don't take it too seriously."</p>
<p>"I'll not," agreed Allen.</p>
<p>He took the paper from Mr. Nelson's hand. The others looked over his
shoulder at it.</p>
<p>"Oh, what do you suppose it means?" marveled Grace. "Do hurry and
translate it, Allen."<span class="pagenum"><SPAN name="Page_89" id="Page_89">[89]</SPAN></span></p>
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