Law Department of the University of Chicago certificate that Robert Nixon has qualified for admission to the Bar as an attorney and counselor at law and a State of Illinois Supreme Court certificate for Robert Nixon to practice law in the state, July 1861, Box: 1, Folder: 1. Nixon and Williamson family papers, RH MS 1116. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/42826 Accessed May 26, 2024.