1Benjamin Waterhouse to Thomas Jefferson, 14 December 1815 (Jefferson Papers)
Unitarianism; and Harvard University [index entry]
2William Short to Thomas Jefferson, 2 July 1822 (Jefferson Papers)
Unitarianism; and Harvard University [index entry]
3Thomas Jefferson to Benjamin Waterhouse, 19 July 1822 (Jefferson Papers)
Unitarianism; and Harvard University [index entry]