1John Adams to Thomas Jefferson, 25 December 1813 (Jefferson Papers)
Leo X, pope [index entry]
2John Adams to Thomas Jefferson, with Postscript by Abigail Adams, 2 February 1816 (Jefferson Papers)
Leo X, pope [index entry]
3William Roscoe to Thomas Jefferson, 28 February 1819 (Jefferson Papers)
Leo X, pope [index entry]