1Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 12 May 1816 (Jefferson Papers)
Gilmer, Francis Walker; and P. S. Du Pont de Nemours’s writings [index entry]
2Francis W. Gilmer to Thomas Jefferson, 10 July 1816 (Jefferson Papers)
Gilmer, Francis Walker; and P. S. Du Pont de Nemours’s writings [index entry]