Muster Roll of Captain Jacob M. Early's Company of Mounted Volunteers, 10 July 1832 (Legislative Digital Edition)
Certification of Abraham Lincoln, John Brannen, and Hugh Armstrong, July 1832 (Legislative Digital Edition)
Peter Hagner to Abraham Lincoln, 19 March 1849 (Campaign Digital Edition)
Abraham Lincoln to Peter Hagner, 2 April 1849 (Campaign Digital Edition)