1Thomas Jefferson’s Account with Joseph Milligan, [8–10 March 1809] (Jefferson Papers)
2Joseph Milligan to Thomas Jefferson, 28 July 1809 (Jefferson Papers)
3Joseph Milligan to Thomas Jefferson, 2 December 1811 (Jefferson Papers)
4Enclosure: Thomas Jefferson’s Account with Joseph Milligan, [ca. 6 February 1818] (Jefferson Papers)