1Isaac Briggs to Thomas Jefferson, 9 May 1817 (Jefferson Papers)
New York (state); and canals [index entry]
2Isaac Briggs to Thomas Jefferson, 15 May 1817 (Jefferson Papers)
New York (state); and canals [index entry]
3Isaac Briggs to Thomas Jefferson, 21 May 1817 (Jefferson Papers)
New York (state); and canals [index entry]