Green River, Wyoming Territory. Dated: 1886. Dimensions: plate: 13.2 x 20.2 cm (5 3/16 x 7 15/16 in.) sheet: 23.2 x 30.2 cm (9 1/8 x 11 7/8 in.). Medium: etching in brown on laid paper. Museum: National Gallery of Art, Washington DC. Author: Thomas M