| Timothy H. O'Sullivan Wall in the Grand Canyon, Colorado River 1871 Albumen print 27.62 x 20.32 cm (10 7/8 x 8 in.) (image) National Gallery of Art Gift of Mary and Dan Solomon and Patrons' Permanent Fund, Accession Number: 2006.133.112 LL/117830 All on mount, across top in letterpress: Explorations in Nevada and Arizona. War Department Corps of Engineers U.S. Army. [around insignia] Expedition of 1871.-Lieut. Geo. M. Wheeler, Com'd'g; across bottom: T.H. O'Sullivan, Phot. No. 11 / WALL IN THE GRAND CAŅON, COLORADA RIVER.
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