1Francis Adrian Van der Kemp to Thomas Jefferson, 25 June 1820 (Jefferson Papers)
New York (city); First Congregational Church [index entry]
2John Vaughan to Thomas Jefferson, 5 August 1820 (Jefferson Papers)
New York (city); First Congregational Church [index entry]
3Timothy Pickering to Thomas Jefferson, 12 February 1821 (Jefferson Papers)
New York (city); First Congregational Church [index entry]