1David Bailie Warden to Thomas Jefferson, 10 December 1811 (Jefferson Papers)
2John Vaughan to Thomas Jefferson, 1 May 1812 (Jefferson Papers)
3Thomas Jefferson to John Vaughan, 25 May 1812 (Jefferson Papers)
4John Vaughan to Thomas Jefferson, 8 June 1812 (Jefferson Papers)
5Thomas Jefferson to John Vaughan, 3 July 1812 (Jefferson Papers)
6David Bailie Warden to Thomas Jefferson, 1 November 1812 (Jefferson Papers)
7Thomas Jefferson to David Bailie Warden, 29 December 1813 (Jefferson Papers)