J.G. Hall 1952 June 27 Sagehen Creek, 3 mi. NW Hobart Mills, Nevada Co, Calif. Live on the rockslide north of the pond. Some raspberries & other low herbs. Many of the rocks are covered with a hard white deposit which looks like cord white wash but is ex- tremely hard and can barely be scraped off with a knife. Down in the crevices between such rocks are piles of little droppings probably of some rodent. Heard some peculiar chirrings coming from deep down between these rocks but didn't see anything. Found a flya of some kind perched on one of the boulders. Main dam is just downstream from lodge and there are smaller ones above & below it. Extensive signs of willow cuttings, mostly old, con- tinues downstream for at least 100 yds. Some canals. Just above intake is another dam-like structure. The boys insist it is a beaver damt but probably is, though at high water its hard