Meanwhile Allen and Henry had come out from the fisherman"s cottage, having satisfied themselves, by a quick search, that no one was in the upper story, or down in the cellar.
"They were here, though," Allen said.
"Yes, my sister"s handkerchief proves that," agreed his chum. "Now we must go back to the others."
"But Grace and Mollie will have a fit when they know we haven"t found Betty and Amy."
"It can"t be helped. There has been some mix-up somewhere. I have an idea, but I won"t spring it now. Come on."
They hurried back to where the motor boat had been left.
"Were they there?" asked Grace, eagerly.
"Yes, they--_were_," said Allen, slowly. "But they"ve gone home."
"How do you know that?" asked Henry in a low voice.
"I don"t know it!" came the reply in a whisper. "But we"ve got to pretend that until we find it isn"t so. I"m hoping it is, though. You see," he went on, aloud, "we found they had been there. Amy dropped her handkerchief."
"But where are they now?" demanded Mollie.
"They probably hurried back to the cottage."
"But without coming to tell us?" objected Grace.
"They probably had no time," said Allen. "My idea is," he went on, speaking rapidly so he would not be interrupted, "that they got some news about the diamonds, and had to act on it quickly. I think that is why they didn"t wait to tell you girls. They knew if they didn"t come back that you would know enough to come home, or they may have planned to return to you later."
"What had we better do?" asked Grace.
"Get back to Edgemere as soon as we can," was Allen"s opinion. "We"ll probably find them waiting for us."
They piled into the motor boat, and used all speed in getting back. No sooner had they reached the little dock, where Tin-Back tied his boats, than Will Ford came racing down from the cottage.
"I thought you would never come back!" he cried, his face showing excitement.
"Why, have you found them? Are they here?" asked his sister, wondering why her brother had returned from Boston.
"Here? Of course they"re here!" he answered. "Where else would they be.
And I"ve found them."
"I don"t see how----" began Allen.
"Oh, it wasn"t easy, I a.s.sure you. I had to work on a lot of clues. But I came out all right. I"ve found out all about "em. Those diamonds were smuggled, and there"s a good reward offered for the capture of the men, as well as something due for turning the diamonds over to Uncle Sam."
"The diamonds!" cried Mollie.
"Yes. I"ve found out their secret!" Will said.
"We--we thought you meant you had found Betty and Amy," returned Grace, in a strange voice. "They--they"re lost! They"re gone!"
CHAPTER XXIV
TO THE RESCUE
"What gone? Not the diamonds!" cried Will, hopping about, first on one foot, and then the other. "Don"t tell me those sparklers are gone, after all the trouble I"ve had on this case--and it"s my first, too! That"s a shame! How did it happen."
"Oh, you and your diamonds!" cried Allen. "It"s the girls who are missing! Don"t you understand? The girls!"
"I don"t understand," replied Will. "What"s the game?"
"And Betty and Amy are not up at the cottage?" asked Mollie.
Will shook his head.
"I just came down from Boston," he said. "I was told you were all out--the boys fishing and the girls on a picnic. I could hardly wait until you came back to tell you the news. But you"ve knocked my feet from under me."
"Oh, it"s just terrible!" said Grace. "What will Mrs. Nelson say?"
"Now look here!" exclaimed Allen, taking charge of matters in the masterful way he had. "We"ve got to do something in a hurry. Of course Mrs. Nelson will have to be told, but it may be all right after all.
Betty and Amy may have gone in to the village, to send a telegram, or something like that."
"What about?" asked Grace.
"The diamonds, of course. They may have struck a clue. Now look here,"
Allen went on quickly. "Will, as I understand it, you have found out to whom those stones belong?"
"Well, yes; that is, almost. There"s been a big smuggling job, and those diamonds are part of the loot, or swag----"
"Such slang!" protested Grace.
"Don"t worry about slang at a time like this," said Mollie. "Go on, Will."
"No, we haven"t time for all his story now," said Allen. "It is enough for us to know that he has solved the mystery."
"This much of it, at any rate," Will a.s.sented, "though I"m in the dark yet about the missing girls. As I said, I"ve been working my government position for all it"s worth. There was a big smuggling job lately, and they were keeping it quiet. These diamonds are undoubtedly part of it, and now if I can only help get some of the men it sure will be a feather in my cap--a whole ostrich plume, in fact."
"Well, the rest of your story will keep," Allen remarked. "The next thing is to trace the girls. Here"s the story about them, Will," and he rapidly told it as he had gathered it from Mollie and Grace.
"At the fisherman"s hut, eh?" mused Will. "I always thought he had a hand in the affair. But where did the girls go from there?"
"That"s just what we don"t know," Henry remarked. "I found Amy"s handkerchief in the cabin, or we wouldn"t have known that much."
"It"s a bare chance that they may have gone to the telegraph office in the village, to send a wire to Betty"s father," said Allen. "We"ll try there before we raise an alarm."
"But can we keep the news from Mrs. Nelson?" asked Mollie.