The USGS en-route with pack train. Yellowstone National Park, Wyoming. 1871.

Album caption: The U.S.G.S. en-route with pack train. Yellowstone Series 1871. Handwritten notes on album caption: Gilbert Doane in the lead. Also Engr. Corps Topog. mapping party in charge of Captains Barlow & Head with a missing escort. New no. 57-HS-114 USGS in National Archives. Descriptive Catalog of the Photographs of the United States Geological Survey of the Territories, W. H. Jackson, Photographer, Second Edition, Illustrated, 1871 Series, page 31, No. 303: The United States Geological Survey, with pack-train, en route upon the trail between the Yellowstone and the East Fork, showing the manner in which all parties traverse these wilds.