“What then?” Bob asked.
“’Bout twenty mile up north ees Lake Chesuncook. I tink mebby they mak’ for dat lake. Cabin on shore. Mebby we find heem there. We try, oui?”
They were about to adopt this plan when suddenly Bob held up his hand.
“Listen,” he whispered.
All strained their ears.
“Hear that?”
“I don’t hear nothin’.” Tom replied; but Jacques, keener of ear, said:
“I hear dog.”
“And it’s Sicum,” Bob declared.
In a few moments the sound came again and this time it was heard plainly by them all. Bob put his fingers to his mouth and a shrill whistle sounded through the still forest. The sound had hardly died away when his quick ears caught the faint sound of an answering whistle.