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[[underlined]] Down to Beaver Camp [[/underlined]]

[[underlined]] Aug. 21 [[/underlined]] - Followed down Castilla River to just above the narrows, a deep impassable canyon and camped at 9500 feet at a little spring creek in a side gulch 100 feet above the river. A colony of beaver with several big dams & ponds & houses was the immediate cause of our camping. Came about 15 miles down the river and about 5 miles below the mouth of Comanche Creek & Gibralter rock. All the way down beautiful valleys with grassy sides & bottoms but no settlements.

Began to strike traces of Transition zone at mouth of Comanche Creek on S.W. slopes and at our camp were fairly in Transition with yellow pines, flexilis, & douglas spruce over open S.W. slopes to 500 feet above us. Still Pinus arristata is abundant on rocky slopes with flexilis & ponderosa. I cant account for it unless this proves to be another zone -- possibly balfouriana.