Grafton Tyler Brown, "View of the Lower Falls, Grand Canyon of the Yellowstone" oil on canvas, 1890.

Brown, Grafton Tyler:

(1851-1918) An African American artist and draughtsman, Grafton spent most of his life in the pacific northwest of the United States. Although he was trained in both lithography and drafting, he did numerous landscape paintings of the terrain of that region.
http://www.onlinenevada.org/grafton_brown

Source: Patton, Sharon F. African-American Art. Oxford: Oxford University Press, 1998. 85-86.