1Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 26 May 1815 (Jefferson Papers)
Spain; colonies of [index entry]
2Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 31 March 1816 (Jefferson Papers)
Spain; colonies of [index entry]
3Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 18 August 1816 (Jefferson Papers)
Spain; colonies of [index entry]