Portrait of Almon Harris Thompson Taken During a Geographic Survey Expedition Somewhere in the United States Titled “Professor A.H. Thompson and His Horse ‘Old Ute’ and Their Shadows" (1871)

Portrait of Almon Harris Thompson taken during a geographic survey expedition somewhere in the United States titled “Professor A.H. Thompson and his horse ‘Old Ute’ and their shadows, 1871.” Attributed to John K. Hillers, Elias Olcott Beaman, and James Fennemore.

Source: National Archives and Records Administration.

Portrait of a Geographic Survey Team in a Camp Near the Mount of the Holy Cross in Colorado Titled "Camp Study. Hayden, Stevenson, Holman, Jones, Gardner, Whitney and Holmes. The Party That Made the First Ascent of the Holy Cross Mountain" (1873)

Portrait of a geographic survey team in a camp near the Mount of the Holy Cross in Colorado titled "Camp study. Hayden, Stevenson, Holman, Jones, Gardner, Whitney and Holmes. The party that made the first ascent of the Holy Cross Mountain," 1873. By William Henry Jackson.

Source: National Archives and Records Administration.