The collection includes family letters of Sidney and Mianda Smith, John U. Smith, and Irene Smith Calbreath; political letters from U.S. Senator John H. Mitchell and U.S. Senator George W. McBride, 1896-1897; business and family papers and letters of John Franklin Calbreath; and Calbreath-Smith genealogical materials. Also included is a copy of the 1839 overland diary of Sidney Smith; biographical materials about J. F. Calbreath and Daniel Bailey, great-grandfather of Helen Calbreath; papers relating to Masonic activities; five account books; and a copy of Western Cycling and Recreation, 1897, containing an article about the McMinnville Cycling Association, which was headed by John F. Calbreath.