Timothy H. O'Sullivan, 1871-1874 (survey), (expedition), 2. View across Black Canon. the grand walls in perspective., [Wheeler Survey, Explorations and Surveys West of the 100th Meridian], Stereocard, Etherton Gallery, LL/24712
Timothy H. O'Sullivan 1871-1874 (survey), (expedition) 2. View across Black Canon. the grand walls in perspective. [Wheeler Survey, Explorations and Surveys West of the 100th Meridian]
