Black Cañon, above camp 7, Colorado 19th century sterescope card.

Photograph shows one of the survey's small boats docked near rock walls along the Colorado River. A man sits on a rock overlooking the river.
Original negative number: 117.

Part of series: U.S. War Dept., Corps of Engineers; Geographical Explorations and Surveys West of 100th Meridian, Expedition of 1871; Lieut. Geo. M. Wheeler, commanding.
Part of: Colorado River Series.
Exhibited: "Framing the West : The Survey Photographs of Timothy H. O'Sullivan" at the Smithsonian American Art Museum, Washington, D.C., February-May 2010.