"Did you ever see the smoke of a camp-fire act like that?"
"Never; have you?"
"Many a time; that's an Injin signal-fire."
This was interesting, but caused nothing in the nature of fear on the part of the boys. It was Fred who remarked:
"The Indians must be signaling to some one."
"Exactly."
"It can't be to us?"
"Not much; it's to another party of Injins, and that other party is calling back to 'em. See whether you can find t'other signal."
The boys moved the points of their glasses back and forth and up and down, but it was not until their guide again pointed out the right spot that they located the second signal. Indeed the vapor was so fine and feathery that it was wonderful how Hank himself had been so quick to note it.
The points were of about the same elevation, and separated by a distance of some two miles. Peak and valley, gorge and canyon, rock and boulder in profusion lay between. No doubt could remain that two parties of Indians were telegraphing messages back and forth, and that they were understood by each party.