Earl of Caithness and William Bambridge, ‘Queen Adelaide's Beech’, 1864, National Gallery of Art, Washington, D.C.
sheet (trimmed to image): 29 x 23.3 cm (11 7/16 x 9 3/16 in.)  support: 56.8 x 42.9 cm (22 3/8 x 16 7/8 in.)