Western Frontier

Carleton E. Watkins

First View of the Yosemite Valley from the Mariposa Trail

Carleton Watkins

Castle Rock, Washington Territory

Timothy O'Sullivan (American, born Ireland, 1840–1882)

Apache Indians, as they appear ready for the war-path, No. 33 from the series "Geographical Explorations and Surveys West of the 100th Meridian"