1Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 26 May 1815 (Jefferson Papers)
John, Prince Regent (later John VI, king of Portugal and Brazil) [index entry]
2Thomas Jefferson to José Corrêa da Serra, 5 June 1816 (Jefferson Papers)
John, Prince Regent (later John VI, king of Portugal and Brazil) [index entry]
3Francis W. Gilmer to Thomas Jefferson, 24 January 1820 (Jefferson Papers)
John, Prince Regent (later John VI, king of Portugal and Brazil) [index entry]