1William Wirt to Thomas Jefferson, 28 December 1818 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; estate of [index entry]
2William Wirt to Thomas Jefferson, 6 July 1819 (Jefferson Papers)
Kosciuszko, Tadeusz (Thaddeus) Andrzej Bonawentura; estate of [index entry]