But the moment a break occurs the turbulence and commotion are instantly very great.
The summer is the wet season here, and to add to our troubles we were treated to frequent rains.

The next day toward noon, as we were sailing along between the black walls, on a rather sluggish current, a deep-toned roar was borne up to our ears.

Nothing could be seen of the cause of it, but a complete disappearance of the river from our sight warned us to make a landing as soon as possible.

Some broken rocks protruding a few feet above the water at the base of the right-hand wall afforded the desired opportunity, and running in we stepped out and mounted them.

The cause of the roaring was immediately apparent.