O.H. Willard's Galleries, ‘Ordnance, Sergeant’, ca. 1864, National Gallery of Art, Washington, D.C.
image: 20.2 x 15 cm (7 15/16 x 5 7/8 in.)  mount: 33.7 x 25.5 cm (13 1/4 x 10 1/16 in.)