1Thomas Jefferson to Joseph Milligan, 26 September 1810 (Jefferson Papers)
Belsham, William; Memoirs of the Kings of Great Britain of the House of Brunswic-Lunenburg [index entry]
2Thomas Cooper to Thomas Jefferson, 15 September 1814 (Jefferson Papers)
Belsham, William; Memoirs of the Kings of Great Britain of the House of Brunswic-Lunenburg [index entry]