1Thomas Jefferson to William Wirt, 5 January 1818 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; wills of [index entry]
2Thomas Jefferson to William Wirt, 27 June 1819 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; wills of [index entry]
3Thomas Jefferson to William Wirt, 5 February 1820 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; wills of [index entry]