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] Portugal; and Brazil
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]
3Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 18 August 1816 (Jefferson Papers)
Portugal; and Brazil [index entry]
4Thomas Jefferson to Lafayette, 14 May 1817 (Jefferson Papers)
Portugal; and Brazil [index entry]
5John Adams to Thomas Jefferson, 26 May 1817 (Jefferson Papers)
Portugal; and Brazil [index entry]
6Francis W. Gilmer to Thomas Jefferson, 24 January 1820 (Jefferson Papers)
John, Prince Regent (later John VI, king of Portugal and Brazil) [index entry]
7James Monroe to Thomas Jefferson, 23 August 1820 (Jefferson Papers)
Portugal; and Brazil [index entry]
8Thomas Jefferson to Francis W. Gilmer, 29 November 1820 (Jefferson Papers)
Portugal; and Brazil [index entry]
9Thomas Jefferson to James Madison, 29 November 1820 (Jefferson Papers)
Portugal; and Brazil [index entry]
10John F. Oliveira Fernandes to Thomas Jefferson, 19 May 1821 (Jefferson Papers)
John VI, king of Portugal and Brazil; mentioned [index entry]