| Timothy H. O'Sullivan No. 4, Black Cañon, Colorado River, Looking Below from Big Horn Camp [Photographs showing landscapes, geological and other features, of portions of the Western Territory of the United States…] 1871 (taken) 1873 (published) Albumen print, from wet collodion glass negative, on printed mount Bibliothèque Nationale de France, Département des Estampes et de la Photographie Département Société de Géographie, SG WF-237, Identifier: ark:/12148/btv1b53067282f, 10 of 60 LL/87959 Lieut. Geo[rge] M[ontague] Wheeler, 1873, Photographs showing landscapes, geological and other features, of portions of the Western Territory of the United States obtained in connection with Geographical and Geological Explorations and Surveys West of the 100th Meridian, seasons of 1871, 1872 and 1873, (Washington: War Department, Corps of Engineers, U.S. Army)
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