7/22 92Martinez July 22, 1892Mr Elliott McAllisterDear SirI think you may find the map of the Wheeler Survey at the rooms of the U.S. Geological Survey at Berkeley. The State Survey map of the Sierra will however answer your purpose fairly well & this you may perhaps find at Pagot Upham & Co S.F. You will have difficulty in finding or climbing Tyndall.With best wishes I am yours trulyJohn Muir
1892 Jul 22
Original letter dimensions unknown.
Reel 07, Image 0607
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