Photograph by William Henry Jackson of Fort Laramie, at the time of the Indian Peace Treaty of 1868. U.S. Geological Survey. Information taken from photocopies of Jackson's The Oregon Trail. Buildings and tents, men standing in road talking.

Photograph of wagons and men camped in grass by the river. The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

Photograph of two men and horses looking up at Independence Rock. The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

Photograph of two men and horses looking up at Independence Rock. The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

Photograph of one man looking down on a campsite from Independence Rock. Note on back: "Camp of the US Geological Survey made at Independence Rock, August 26 -1870." The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

Photograph of one man looking down on a campsite from Independence Rock. Note on back: "Camp of the US Geological Survey made at Independence Rock, August 26 -1870." The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

Photograph of two men on rocks looking down at a wagon and other men on banks of the Sweetwater River. The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

Photograph of two men on rocks looking down at a wagon and other men on banks of the Sweetwater River. The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).

The photograph was taken on the Oregon Trail area through Wyoming, according to Newhall and Edkins (137).