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