1Thomas Jefferson to John Barnes, 5 January 1818 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; wills of [index entry]
2Thomas Jefferson to John Barnes, 14 March 1819 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; wills of [index entry]
3Thomas Jefferson to John Barnes, 10 September 1821 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; wills of [index entry]