1James Madison to Thomas Jefferson, 1 May 1809 (Jefferson Papers)
Mexico; and U.S. [index entry]
2Isaac Briggs to Thomas Jefferson, 16 February 1816 (Jefferson Papers)
Mexico; and U.S. [index entry]
3James Monroe to Thomas Jefferson, [received 27] May 1820 (Jefferson Papers)
Mexico; and U.S. [index entry]