Then a second call was heard, emitted in precisely the same manner as before.

This was the one which did the business.
The trained ear of the veteran scout could have detected no difference that had been made, but there was, for all that, and a very wide one, so far as meaning was concerned.

The red-skin had no sooner caught it than he dismounted and moved carefully forward, his mustang quietly following him, bearing the lad upon his back.
The warrior glanced backward only once, to satisfy himself that his steed was there, and understood what was required of it.

In the meantime, the heart of Fred was throbbing painfully with hope.

He felt as if Providence was interfering directly in his behalf.
"Now is my time," he added, a moment later..