from the mountains, overlain by a considerable thickness of clean pebble deposit formed no doubt partly by rearrangement of last & partly from surrounding rocks by river itself when at higher level.

Aug 25 Thinking that E-side of lake S of camp best place to see the lower series of rocks seen yesterday at the Cascade &c, & East also wanting to go over there for survey purposes accompanied him. Attempted to go round to a narrow place N of this & cross on horseback. Found the way so tangled & boggy that came back determined to build a raft. Got a raft built after a good deal of trouble, the wood not being suitable. Embarked, 5 in all after lunch & tried to paddle over. Got on slowly till about 1/3 over when light breeze sprung up ahead & soon reduced progress to nil. The water washed nearly all over the raft its power application so small. The traverse about a mile. Obliged at last to turn back & give up attempt with so clumsy a raft. Water of lake from colour & cleanness must be immensely deep. Got horse saddled & went down to look at rocks near the fall. Also tried for a trail going along W. side of lake but could find none passable.

Found a Lymnaea & Physa along shore of lake. Not very common. Also found a small fish like a Cottus lurking among stones along the margin. Managed to catch 4 or 5 of them & put them in spirits.