Guide to Research CollectionsMinnesota Historical Society
St. Paul, MN
Papers: 1873-1929. 1 roll of microfilm, originals loaned by Mrs. Clapp. Correspondence, clippings, and miscellany relating to political campaigns and activities as senator. Finding aid.
Additional Papers: Letters in many other collections; published speeches.
State Historical Society of North Dakota
Papers: Correspondence in Frank S. Talcott papers, 1883-1908.
Yale University Libraries
Manuscripts and Archives
New Haven, CT
Papers: In Wallace Notestein papers, 1899-1969.