We had got four or five miles up the river when the roaring sound of rushing waters struck our ears, and we knew that we should have to make another portage.  The only practicable one was on the east bank, and as it would occupy us the greater part of an hour, we could scarcely hope to escape the Indians, even should they not already have arrived at the spot.  On the left rose a line of precipitous rocks, over which we should be unable to force our way.  At length we got up to the foot of the rapids.  Uncle Donald took a survey of them.  I observed on the west side a sheet of water flowing down smoother and freer from rocks than the rest.