Every move was planned and carried out with the exactness of a battle; as if the falls were actual enemies striving to discover our weakness.

One practice was to throw sticks in above them, and thus ascertain the trend of the chief currents, which enabled us to approach intelligently.

The river here was not more than four hundred feet wide.

As we continued, the canyon finally widened, and at one place there was a broad, rocky beach on the left.

The opposite wall was nearly three thousand feet high.