| Timothy H. O'Sullivan Chanon de Chelle. Walls of the Grand Canon about 1200 feet in height [Geographical & Geological Explorations & Surveys West of the 100th Meridian. Expedition of 1873.- Lieut. Geo. M. Wheeler, Corps of Engineers, Commanding.] 1873 Albumen print Museum für Kunst und Gewerbe / MKG Inventory number: P1976.421.4 LL/126283
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