The canyon became suddenly very close and assumed a formidable appearance.

We listened for the roar of a rapid but for some time nothing was heard.

The splendour of the walls impressed us deeply rising 2000 feet, many coloured, carved, and terraced elaborately.

Our admiration was interrupted by a suggestive roar approaching and suddenly a violent rapid appeared.

There was ample room and we got below it by a let-down, that is by lowering the boats one at a time with their cargoes on board, along the margin, working in and out of the side currents.