At the point where the stream issued from the canyon, its width was about twenty yards.

It flowed swiftly, but quickly slackened its pace, since its expansion was fully a hundred feet.

This flowed for probably double that distance, when the high banks again appeared, and what may be called the regular canyon was resumed.
Jack and Fred sat down to survey the curious picture.

They noticed that the canyon seemed to be dotted at intervals with rocks, some of which rose to a considerable height above the current.

Many were near one side or the other, while others were in the middle of the swift stream, which dashed against them with a violence that threw the spray and foam high in air.