| William Bell Sand sculpture, Grand Caņon. [U.S. War Dept., Corps of Engineers; Geographical Explorations and Surveys West of 100th Meridian, Expedition of 1872; Lieut. Geo. M. Wheeler, commanding. / Geological Series.] 1872 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00268 (digital file from original photo, front) LL/108294
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