"Not till we have something more tangible to go upon. After all, we have proved nothing, but to-night we'll keep a close watch on Barton and in that way find out if our suspicions are correct or not."
And so it was arranged. The boys hunted a bit more, but somehow the strange signals and the peculiar behavior of Barton had got on their minds, and they gave up their sport earlier than they had expected and trudged back to camp to complete their arrangements for the night's work.
CHAPTER XVI.
SCOUTING FOR UNCLE SAM.
"Rob! Rob! Rob!"
Merritt nudged his dozing companion as they lay near to the submarine shed, where they had taken up their position earlier in the night. Immediately after supper the lads had, apparently, slipped off to their tents; but as soon as they were sure that they were free from observation they had, in pursuance of their plans, taken up a position close to the sheltering place of the Peacemaker.
Rob had dozed off shortly before midnight, and the words at the beginning of this chapter formed Merritt's notification to him that it was time to bestir himself.
The boy, aroused at once from his nap, sat up at his comrade's summons.