University of Wyoming
Pfeiffer, along with partners, Wesley C. and Ernest W. Copps, operated the Bar OP cattle ranch near Buffalo, Wyoming.
Collection consists of Pfeiffer's financial ledger (1886-1910) containing ranch accounts, annual recapitulations, agreements with the Copps and others, and drawings and specifications for buildings on the Bar OP Ranch and the Armstrong and Remington Ranch, also near Buffalo.
There is a photograph album of an 1889 trip of Pfeiffer and others to Yellowstone National Park, with photographs of the park, Mammoth Hot Springs Hotel and F.J. Haynes' photograph counter in the hotel. The album also contains photographs of Cooke City and the Crow Indian Reservation in Montana, interior and exterior views on the Bar OP Ranch and Armstrong and Remington Ranch. There are also miscellaneous materials (1912-1916) concerning the settling of Oscar Pfeiffer's estate by the Pfeiffer family, and a group of photographs (1908) of Bar OP Ranch scenes.
There are no access restrictions on the materials for research purposes, and the collection is open to the public.
The researcher assumes full responsibility for observing all copyright, property, and libel laws as they apply.
There are no known other archival collections created by Oscar Pfeiffer at the date of processing.
Finding aid available in repository.
Item Description, Box Number, Folder Number, Collection Name, Collection Number, American Heritage Center, University of Wyoming.