He leaned forward, regarding the paper closely in the yellow lamplight, while the others crowded eagerly about him.

"Well--what-do-you-know-about-that!" he said slowly, pushing the paper from him disgustedly. "All in code--and a code that will need an expert to figure it out. Gee, that's a mean trick, that is!"

Frank picked up the paper and pored over it for a moment, while the rest watched him anxiously.

"Yes, that's a stiff one," he said at last. "I guess there's no use in our wasting time over it."

"It proves one thing anyway," put in Allen, from his corner. "The paper is important, and our friend to-night is undoubtedly what we thought he was."

"Much good that does us," said Will, morosely folding the paper and stuffing it carefully into his pocket. "Of course, it's better than nothing, and we'll get it into official hands just as soon as we can; but we certainly ought to have caught that rascal."

"Say!" exclaimed Roy suddenly, his eyes gleaming with the light of adventure, "maybe it isn't too late yet. Unless Adolph, the spy, had a boat or swam to the nearest island, which is more than a mile away, he's still on this island somewhere. We've got our good old trusties over in the big tent, and there's a bare chance we might be able to round him up."

"No, you don't!" said Grace decidedly, while all the girls looked startled. "You're going to use your guns to keep that man away from here. Do you suppose we're going to lie awake all night listening for shots?"

"Oh, all right," said Roy, "I'm properly squelched."

"Let's go to bed," yawned Grace, "I'm dying by inches. And, oh, Mollie, dear, don't forget to bring the candy box!"

Half an hour later the lights in the little cottage were out and the boys, all except Allen, who had been made as comfortable as possible in the house, were taking turns at standing guard outside.

Despite the quiet beauty and peace of the night, the girls found it almost impossible to sleep. They tossed and dozed, and waked and dozed again until, toward daylight, they fell into a restless, uneasy sleep.

CHAPTER VII

ROBBED

Crack! Crack!

The girls started to a sitting posture and regarded each other fearfully.

"What is it?" cried Mollie, her eyes big and round in the semi-dark.

"Betty, what are you doing?"

"That was a shot," responded Betty, her voice quivering with excitement. "I've been listening for it all night. Who's coming--"

"Oh, dear!" wailed Amy. "I knew some one would get killed! It's worse than some awful nightmare."

But Betty was already running from the room, with Mollie close at her heels. Reluctantly, Grace and Amy slipped on their robes and slippers and followed.

Betty almost ran into Mrs. Irving on the landing, and gasped an apology.

"Oh, dear, what do you suppose it is?" she panted, as they went on down the stairs together. "If another of the boys is hurt--"

But at that moment the boys themselves came bursting in upon them, rumpled, sheepish and out of temper, to confront the excited girls in the lower hall.

"What do you know about that?" cried Roy disgustedly. "If I'm not the biggest fool that ever lived, I'll eat my hat."

"Far be it from me to stop you," growled Will. "He must have pa.s.sed near enough to touch you, and you let him get away."

"Well, you needn't rub it in," retorted Roy, turning upon him savagely, while the girls looked from one to the other uncomprehendingly. "You ought to know I'm sore enough without having you find fault."

"Cut it out, fellows," Frank put in peaceably. "It wasn't anybody's fault; just hard luck, that's all."

"But what?" Mollie interrupted impatiently. "What happened?"

"Well, you see it was like this," began Will, still in a bad temper.

"We fellows decided that our friend, Adolph Hensler, might have some mistaken longings for the code letter he dropped, and might follow us and try to steal it back. So we thought we'd set a trap for him by keeping watch, turn and turn about, in such a position that he couldn't possibly see us."

"Yes, and that's about all," Roy, speaking bitterly, took the story away from Will, "except that it was yours truly's turn at sentry duty, and he went to sleep, leaving Adolph a clear field."

"And did he really come back?" asked Betty, glancing apprehensively over her shoulder as though she was afraid the rascal might be close at hand.

"Yes, he really did," said Roy, still bitterly. "And if I hadn't happened to see him coming out of the window--"

"Out of the window!" echoed Grace, who, with Amy, had decided that the lower hall with company was more to be desired than a room upstairs alone. "Oh, Roy, from this house?"

"Since this is the only one for three miles around, I suppose it was," said Roy, with biting sarcasm.

"But he may have been in our room," cried Amy, beginning to shiver again.

"Very likely," said Will grimly, while Mrs. Irving looked decidedly worried. "The one good thing about the whole affair is, that he didn't get the letter."

"Oh, bother the letter," cried Mollie, cross because she could not stop trembling. "I--I wish it were daylight. I never wanted to see the sun so much."

"Well, it is, almost," said Frank, waving his hand toward the east where a dim grey veil was replacing the blackness of night. "Adolph must have been hanging around for some time, before he got the chance he wanted."

"Before I went to sleep," put in Roy moodily.

"But didn't you follow him?" queried Betty, eagerly.

"Of course," said Will, "until he disappeared in the woods; and you might just as well hunt for a needle in a haystack, as look for him there. Besides, we wanted to see if you girls were all right."

"Well, we're not," said Grace dispiritedly. "We didn't have half enough sleep, and now we've been scared to death for the second time in one night."

"Well," said Mrs. Irving, coming out of a brown study, and speaking decidedly. "There's nothing to be gained by standing here. Probably none of us will be able to sleep any more to-night, but we can at least get dressed. Come, girls, we don't want to add sickness to our problems."

"This time we're all going to watch," Will called after them, as they started up the stairs. "If Adolph comes back again, he won't get away so easily."

Slowly the girls reentered their room, and were relieved to find that the long night with all its weird suggestions and imaginings, was really over. Beds and dressers were distinctly visible in the faint grey light that filtered into the room. Soon the sun would be up.

"Oh, I'm so tired," sighed Mollie, sinking down on the edge of her bed and gazing about her disconsolately. "I feel as if I ought to be tremendously excited, but I'm too sleepy to care much about anything."

"Wait till the sun comes up," said Betty, recovering a little of her old cheeriness. "That makes everything look different. I wonder," she added, as if the thought had not been in her mind all the time, "how Allen is. The noise didn't even seem to disturb him. I think I'll ask Mrs. Irving if I can go--and--see----"