1Thomas Jefferson to Patrick Gibson, 18 September 1812 (Jefferson Papers)
du Pont de Nemours, Eleuthère Irénée; gunpowder of [index entry]
2Thomas Jefferson to Patrick Gibson, 12 June 1813 (Jefferson Papers)
du Pont de Nemours, Eleuthère Irénée; gunpowder of [index entry]
3Thomas Jefferson to Patrick Gibson, 20 May 1813 (Jefferson Papers)
du Pont de Nemours, Eleuthère Irénée; gunpowder of [index entry]