1Thomas Jefferson to John Armstrong, 17 January 1818 (Jefferson Papers)
Armstrong, James Kosciuszko; and T. Kosciuszko’s estate [index entry]
2Thomas Jefferson to John Armstrong, 20 March 1818 (Jefferson Papers)
Armstrong, James Kosciuszko; and T. Kosciuszko’s estate [index entry]
3Thomas Jefferson to John Armstrong, 14 March 1819 (Jefferson Papers)
Armstrong, James Kosciuszko; and T. Kosciuszko’s estate [index entry]