Carleton E. Watkins, ‘Alcatraz Island and San Francisco Bay, Looking North’, 1880s, National Gallery of Art, Washington, D.C.
image: 9.3 x 16.2 cm (3 11/16 x 6 3/8 in.)  mount: 10.7 x 16.5 cm (4 3/16 x 6 1/2 in.)

About Carleton E. Watkins