It came and vanished like the flitting of a bird's wing.
The youth for the moment was amazed beyond expression, and was at a loss to explain what it could be.

Then the truth flashed upon him.

Some one else was also going up the canyon, and had leaped from the rock to which Jack was clinging, on his way to the next one.

He strove to pierce the darkness, but the effort was useless.
"I would give a good deal to know who he was; I couldn't make out whether it was a white man or an Indian.

It may have been Motoza, Tozer, Hank, or a stranger; but whoever he was, he has no use for me." Half suspecting a third party might put in an appearance, Jack waited on the rock for some minutes, but nothing of the kind occurred, and he prepared to continue his retreat.
The water was almost icy cold, the temperature being perceptibly lower between the walls of the canyon and the clear air outside.