"That isn't a bad idea," Phil told him; "so start in right away with a yodel."
This was all the other was waiting for, and he accordingly lifted up his voice in a loud shout. Any camper hearing it would understand that the call was meant for a friendly one, and must hasten to reply.
"There, wasn't that an answer; or do they have echoes as wonderful as that up here in the North Woods?" demanded X-Ray, excitedly.
"It was a shout, all right," Ethan told him, positively.
"And came from over on our right," added Phil, pleased at least that all their labor had not been for nothing.
"Let's mark the trail so we can be sure to find her again," Ethan continued; always cautious about letting a good thing slip him.
This being done by means of a certain tree that all of them felt sure they must easily recognize, even at some distance, the four Mountain Boys turned toward the spot where that faint "hallo" had come from.
Presently keen-eyed X-Ray Tyson told them he saw smoke.
"That's right," admitted Ethan, when he had followed the extended finger of the other chum; "and of course it means they've got a camp fire burning; though after all that rain it'd take a good woodsman to know where to find dry wood, except in the heart of some stump. Let's hurry up and get there."
He kept watching as he went on. It would grieve Ethan sorely should he find at any time they were actually lost, and after he had taken so many precautions in the bargain.