Survey of Section 16 in Township 17 North, Range 6 West, 10 May 1836 (Legislative Digital Edition)
Statement of Payment from Sangamon County Commissioners' Court to Abraham Lincoln for Surveying School Section, 4 September 1836 (Legislative Digital Edition)
Report of George Pasfield, Washington Iles, and John Williams to the Sangamon County Commissioners' Court, 23 May 1837 (Legislative Digital Edition)