1Peter S. Du Ponceau to Thomas Jefferson, 11 December 1817 (Jefferson Papers)
Mexico; and Spain [index entry]
2Thomas Jefferson to Bernard Peyton, 13 October 1818 (Jefferson Papers)
Mexico; and Spain [index entry]
3William Short to Thomas Jefferson, 2 May 1820 (Jefferson Papers)
Mexico; and Spain [index entry]
4William Thornton to Thomas Jefferson, 9 January 1821 (Jefferson Papers)
Mexico; and Spain [index entry]