Scope and content: There are 19 large William Henry Jackson photographs in the archives. Seven of these are of the Grays, Hooker, et al. camped in La Veta Pass, Colorado, July 1877; there are two different views, with two prints of one and five of the other; several prints are mounted on the printing backings of the US Geological Survey of the Territories. Ten photographs are of Yellowstone and the surrounding area; all of these are on the US Geological Survey of the Territories backings. ...