It would have been nothing to run had it been free from rocks; but it was in reality the rocks which formed it.

They had fallen from the left-hand wall within some comparatively recent time, and acted as a dam.

Many more were piled up against the left-hand cliff.

The river, averaging about two hundred and fifty feet wide, had been narrowed by about one-third and a rapid had thus been changed into a fall.

We made a portage here with the first and third boats.