This primary source comes from the Records of the U.S. Geological Survey.
National Archives Identifier:
516897Full Citation: Looking west from over Devil's Gate showing the plains of the Sweetwater, the Oregon Trail, and the Seminole Mountains in the distance. Gifford and Elliot in the foreground. Ambulance below carrying p; 1870; Records of the U.S. Geological Survey, Record Group 57. [Online Version, https://docsteach.org/documents/document/looking-west-from-over-devils-gate-showing-the-plains-of-the-sweetwater-the-oregon-trail-and-the-seminole-mountains-in-the-distance-gifford-and-elliot-in-the-foreground-ambulance-below-carrying-photo-, May 7, 2024]