1Thomas Jefferson to Richard Peters, 6 March 1816 (Jefferson Papers)
2Richard Peters to Thomas Jefferson, 25 March 1816 (Jefferson Papers)
3Thomas Jefferson to George Washington Jeffreys, 3 March 1817 (Jefferson Papers)
4Thomas Jefferson to Thomas Mann Randolph, 5 March 1817 (Jefferson Papers)
5George Washington Jeffreys to Thomas Jefferson, 8 April 1817 (Jefferson Papers)
6Thomas Jefferson to Tristram Dalton, 2 May 1817 (Jefferson Papers)
7Enclosure: Thomas Jefferson’s Paper Model of Thomas Mann Randolph’s Plow, [ca. 2 May 1817] (Jefferson Papers)
8George Washington Jeffreys to Thomas Jefferson, 11 May 1817 (Jefferson Papers)
9Tristram Dalton to Thomas Jefferson, 27 May 1817 (Jefferson Papers)
10Richard Peters to Thomas Jefferson, 28 June 1817 (Jefferson Papers)
11George Washington Jeffreys to Thomas Jefferson, 30 March 1818 (Jefferson Papers)
12George Washington Jeffreys to Thomas Jefferson, 3 November 1818 (Jefferson Papers)