1Charles Willson Peale to Thomas Jefferson, 18 June 1815 (Jefferson Papers)
patents; in Europe [index entry]
2Joseph Cabell Breckinridge to Thomas Jefferson, 20 June 1815 (Jefferson Papers)
patents; in Europe [index entry]
3Thomas Jefferson to John George Baxter, 16 July 1815 (Jefferson Papers)
patents; in Europe [index entry]