Timothy H. O'Sullivan, 1871-1874 (survey), (expedition), 3. View down Black Canon, from Mirror Bar. the walls repeated by reflection., [Wheeler Survey, Explorations and Surveys West of the 100th Meridian], Stereocard, Etherton Gallery, LL/24714
Timothy H. O'Sullivan 1871-1874 (survey), (expedition) 3. View down Black Canon, from Mirror Bar. the walls repeated by reflection. [Wheeler Survey, Explorations and Surveys West of the 100th Meridian]
