1Pierre Samuel Du Pont de Nemours to Thomas Jefferson, 7 December 1815 (Jefferson Papers)
Virginia; steamboats in [index entry]
2Joseph Miller to Thomas Jefferson, 16 February 1819 (Jefferson Papers)
Virginia; steamboats in [index entry]
3Robert Taylor to Thomas Jefferson, 13 March 1819 (Jefferson Papers)
Virginia; steamboats in [index entry]
4Jerman Baker to Thomas Jefferson, 26 September 1820 (Jefferson Papers)
Virginia; steamboats in [index entry]
5Joseph C. Cabell to Thomas Jefferson, 22 December 1820 (Jefferson Papers)
Virginia; steamboats in [index entry]