Timothy H. O'Sullivan, 1871-1874 (survey), 1872 (expedition), 12. View in the Grand Canon of the Colorado River., [Wheeler Survey, Explorations and Surveys West of the 100th Meridian], Stereocard, Etherton Gallery, LL/24732
Timothy H. O'Sullivan 1871-1874 (survey), 1872 (expedition) 12. View in the Grand Canon of the Colorado River. [Wheeler Survey, Explorations and Surveys West of the 100th Meridian]