1. Breckinridge Family Papers Desha Breckinridge Issa Desha Breckinridge Sophonisba Preston Breckinridge William C.P. Breckinridge
2. Grace and Edith Abbott Papers Sophonisba P. Breckinridge Papers Julius Rosenwald Papers University Presidents’ Papers, 1889–1925
3. General Records, Class of 1888 Class History ’88 Class Letters: 1894–1895
4. Anita McCormick Blaine Papers
5. Sophonisba Preston Breckinridge, Official Transcript, University of Chicago, Office Of the Registrar Kentucky Court of Appeals Order Book 73, p. 376, Kentucky Department for Libraries and Archives, Public Records Division.