1Hezekiah Niles to Thomas Jefferson, 1 October 1811 (Jefferson Papers)
Niles, Hezekiah; letters to accounted for [index entry]
2Samuel Butler (for Hezekiah Niles) to Thomas Jefferson, 11 September 1816 (Jefferson Papers)
Niles, Hezekiah; letters to accounted for [index entry]
3Thomas Jefferson to Edward Ingersoll, 23 March 1820 (Jefferson Papers)
Niles, Hezekiah; letters to accounted for [index entry]
4Thomas Jefferson to Hezekiah Niles, [7 February 1822] (Jefferson Papers)
Niles, Hezekiah; letters to accounted for [index entry]