Link to the Image Source
Smithsonian American Art Museum

Artwork Details 

Title: A'h-sha-la-coots-ah, Mole in the Forehead, Chief of the Republican Pawnee
Dated: 1832
Medium: oil on canvas
Dimensions: 29 x 24 in. (73.7 x 60.9 cm)
Location: Smithsonian American Art Museum
City, State: Washington, D.C.