| O.H. Willard Engineer Sergeant 1865 (ca) Albumen silver print, hand-colored, from a wet collodion negative 7 15/16 × 5 15/16 ins (20.2 × 15.1 cm) (image and sheet) 13 1/8 × 10 1/4 ins (33.3 × 26 cm) (mount) Philadelphia Museum of Art Purchased with the Lola Downin Peck Fund, 2015, Accession Number: 2015-143-2 LL/71232
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