It was to be supposed that where this furious current was compressed into such a narrow compass its depth was considerable, and within its grasp the most powerful swimmer would be helpless.
Peering into the gloom, the youth saw the top of the next rock which was used as a stepping-stone by other visitors.

If he were mistaken it would be bad for him, but, with only a few minutes' pause, he gathered his muscles and proved he was right.

He was now fairly within the canyon and still standing on solid support, while there had been no trouble to maintain his foothold from the moment he made the first leap.
His success thus far gave him renewed courage.
"What one person has done another can do," was his thought.

"Fred and I agreed that there is a good deal of risk in this, but if I had a little more light nothing could be easier.

These rocks seem to be placed at the right intervals, and so long as I can locate them I'll go ahead." The belief of Jack was that somewhere in the side of the canyon was a cave in which his comrade was held captive.