162 at least 1000 ft deep On top of this glacier pass there are lakes & [moraines] smooth & par [parallel] If this pass had been made by the cutting away of the present summit by gls [glaciers] thus [sketch] then the bottom of the pass would have been uneven & scalloped by the downward action of the ice success-
163 ively applied to every portion [sketch] as it (the ice) worked back just as the bottom of the right fork is roughened with lake basins & hillocks of hard rock but the bottom of this left fork is smooth & very straight by the steady & horizontal thrust of oversweeping ice from main summit. Summit cans [cañons] all curve N ward [northward] but overswept cans [cañons] are straight [this left]
Original journal dimensions: 7 x 15 cm.
Holt-Atherton Special Collections, University of the Pacific Library
John Muir, journals, drawings, writings, travel, journaling, naturalist