William Bell, ‘Looking South into the Grand Ca–on, Colorado River, Sheavwitz Crossing’, 1872, National Gallery of Art, Washington, D.C.
image: 27.4 x 20.4 cm (10 13/16 x 8 1/16 in.)  mount: 50.7 x 40.5 x 0.1 cm (19 15/16 x 15 15/16 x 1/16 in.)