"I can't make out unless they are a party of crazy campers amusing themselves," rejoined Rob; and then he suddenly burst out: "By Jove, I have it; they are signalling."
"I haven't decided yet; but I wonder if the same thought has occurred to you as to me?"
"Namely, what?"
"Why, that Barton was watching those signals."
"You mean that they were intended for him?"
"That's what."
"But what would they be signalling him for?"
"Only one thing that I can think of. You know what the ensign said about spies; well, if that fellow Barton isn't up to some crooked work, why should he sneak off like this and be so anxious to hide from us when we happen along accidentally? Then, too, there's that paper covered with drawings that I found in the engine room."
"By ginger, I see what you are driving at. You think that Barton is a traitor, and is in league with those spies?"