There was no answer except the echo, and it rolled up out of the chasm with strange, hollow mockery.
"Don took a cougar down this slide," said Frank.

"I saw the brute, an' Don was makin' him hump.

A--ha! There! Listen to thet!" From the green and yellow depths soared the faint yelp of a hound.
"That's Don! that's Don!" cried Jones.

"He's hot on something.

Where's Sounder?
Hyar, Sounder! By George! there he goes down the slide.