1Charles Willson Peale to Thomas Jefferson, 18 June 1815 (Jefferson Papers)
Franklin, Benjamin; inventions of [index entry]
2Robert H. Saunders to Thomas Jefferson, 9 May 1817 (Jefferson Papers)
Franklin, Benjamin; inventions of [index entry]
3John Vaughan to Thomas Jefferson, 24 May 1819 (Jefferson Papers)
Franklin, Benjamin; inventions of [index entry]