"Then of course it must have been a human being," remarked Will, for Frank's decisions seemed to leave no other explanation possible.
"I'm wondering why he came in here, and what he did," continued the other, as he wandered about the place scrutinizing everything. "There's not a sign of anybody's sleeping in one of our bunks, and so far as I can make out there's been no cooking going on here since we had our lunch yesterday, because I remember just how I put everything away then."
"Frank, it's certainly a deep mystery."
"Oh, well! what's the use of bothering our poor heads over it when there was no mischief done. Let's get busy with something to eat. I'm as hollow as a drum right now, and I'm not ashamed to say it, either."
When presently the coffee began to throw out the most tantalizing odor, and the sizzling bacon added its quota to the aroma, the boys felt they could hardly wait until things were ready.
Munching some crackers helped them to hold off a bit, and presently, when things were done, the welcome call to breakfast sounded.
The lake must have been rough and high during the previous night's gale, for the waves still rolled up on the beach in places, though the wind had changed.
"Don't you think they must have started from over yonder by now?" Will was asking as he and Frank began to eat more slowly, having taken the fierce edge from their appetites.
"Yes, the sea has gone down enough by now to let them take chances," Frank admitted; "and after we're through eating we'll use the glasses to find out."
Although he had not said anything about it to his chum, Frank believed he had detected a moving spot far away on the water, and in the direction of the village, which he thought might be the camp boat with their two mates.