their keen minds.

"What do you suppose they want to know that for?" asked Barney. "The
war's over."

"Perhaps further intrigue by our former enemy. Perhaps smugglers.
Perhaps--well, do your own perhapsing. But say!" Bruce exclaimed,
"wouldn't it be great to take packs, rifles and mosquito-bar netting and
go hunting that fellow in that Northern wilderness?"

"Great sport, all right," grinned Barney. "But you'd have about as much
chance of finding him as you would of locating German U boat M. 71 by
walking the bottom of the Atlantic."

"That's true, all right," said Bruce thoughtfully. "But just think of
that wilderness! Lakes no white man has seen; rivers no canoe has
traveled; mountain tops no human ever looked from! Say! I've lived in
Canada all my life and up to now I've been content to let that wilderness
just be wild. But the war came and I guess it shook me out of myself. Now
that wilderness calls to me, and, the first chance that offers, I'm going
to turn explorer. The wireless station offers an excuse, don't you see?"

Barney grinned. He was a hard-headed, practical Yankee boy; the kind who
count the cost and appraise the possible results.

"If you are talking of hunting, fishing, and a general good time in the
woods, then I'm with you; but if you are talking of a search for that
wireless, then, I say, give me some speedier way of travel than tramping.
Give me--" he hesitated, then he blurted out: "Give me an airplane."