Report of Abraham Lincoln, Michael Killion, and Hugh Armstrong to the Sangamon County Commissioners' Court, [2] June 1834 (Legislative Digital Edition)
Survey of Huron, Illinois, 21 May 1836 (Legislative Digital Edition)
Survey for the Sangamon County Commissioners' Court, 2 June 1836 (Legislative Digital Edition)
Survey of Albany, Illinois, 16 June 1836 (Legislative Digital Edition)