The companion boats were detained by whirlpools and could not quickly go to the rescue, but when they finally did reach the Dean, she was bailed out, the men climbed on board of her again, and they all went on without even trying to land.
The next day, in one hour, they ran on a wild dashing river ten miles without stopping, and, what was to them most important, they ran out of the granite.

The bright colours of the sedimentary rocks put new cheer into them.

On they ran, down the narrow canyon, now about three thousand feet deep, always on swift water, but for a time there were no bad rapids.

On August 25th they reached a fall where the river was once dammed up for a great height by an overflow of lava from craters on and near the brink.

One of the craters was plainly visible from below.