Diaries, 1866-1923, daily entries maintained throughout most of Klotz's working life; Correspondence, notes, reports, and memoranda, n.d., 1903, material relating mostly to the Alaska Boundary, genealogical notes, poems and addresses, miscellaneous programs and souvenirs; Printed material, 1886, 1907, comprises pamphlets, official printed memoranda, and articles relating mostly to the Alaska Boundary; Preston School, 1892, (photocopy) "Statistics and History of the Preston School Compiled and Written by Otto Klotz for the Use of His Family;" Scrapbooks, 1886-1922, clippings relating to the Klotz family, Otto Klotz's work, professional matters, and world events.The fonds also contains works of art entitled "One of Sitting Bull's Band of Sioux Indians", "Weh-Win-Chica-Pow, Cree Indian", and "Fort Ellice", [ca. 1881]; and a portrait entitled "Wah-Coo-ai, an Assiniboine Indian" from the 1881 diary of Klotz.