The first indication of descending waters was a slight swiftness, the river having narrowed up to its canyon-character.

At one place it doubled back on itself, forming in the bend a splendid amphitheatre which was called after Sumner of the former party.

This beautiful wall, about one thousand feet high, was carved and sculptured by the forces of erosion in a most wonderful manner.

It is shown on page 205.

After a few miles between such walls we began to expect rapids, and hardly had the expectation been formed when it was gratified.