Abstract The papers of Walter Cooper, a prominent Bozeman pioneer, consist of correspondence (1901, 1913, 1924) including letters by Nancy Russell discussing illustrations for A Most Desperate Situation; a typescript of a diary (1881) kept by Cooper during the West Gallatin Pacific Exploring Expedition; financial records (1904-1911) regarding lead ore shipping; a speech (1907) given by Cooper to the Gallatin County Pioneer regarding W.W. Alderson); writings (1910) including handwritten and typescript...