He scarcely breathed while he listened.

But there came no repetition of the noise.

Had some animal, a fox or a wolf, perhaps, set a stone rolling down one of the precipitous walls of the chasm?
He went on slowly, listening, watching.

A few paces more and he stopped again.

There was a faint, suspicious odor in the air; a turn around the end of a huge mass of rock and his nostrils were filled with it, the pungent odor of smoke mingled with the sweet scent of burning cedar! There was a fire ahead of him.