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Start Over Institution University of Michigan Author Geographical Surveys West of the 100th Meridian (U.S.) Bounding Box -40.000931 39.999015 -39.999064 40.000987

1. Map showing routes of the river and land parties engaged in exploring the Grand Cañon of the Colorado; under the command of 1st. Lieut. Geo. M. Wheeler, Corps of Engineers, U.S. Army; P.W. Hamel and L. Nell, Topographers; Weyss, Thompson & Lang del. [i.e. delineator or engraver].

Maps University Of Michigan Public content
1878. Dahl, James, former owner, Geographical Surveys West of the 100th Meridian (U.S.), Hamel, P. W., topographer, Humphreys, A. A. (Andrew Atkinson), 1810-1883, Nell, Louis, topographer, and Wheeler, George M. (George Montague), 1842-1905. Relief shown by hachures and spot heights. Prime meridian: Washington. Shows exploration routes, state borders. At lower left: "Issued Feb. 4th, 18...

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