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US Geographical survey west from 1872

U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey) Colorado Canyon Etc. No. 6. From Mt. S. of Mt. Trumbull. Locales noted, left to right: Breaks San Francisco Mt. Camp. On back: "From cone S. of Oak Spgs." Arizona, November 31, 1872.

Surveywest1872USgeographicaldrawing1800s