1Thomas Jefferson to John Adams, 15 August 1820 (Jefferson Papers)
A Dictionary of the English Language (S. Johnson) [index entry]
2Thomas Jefferson to Frederick A. Mayo, 2 March 1822 (abstract) (Jefferson Papers)
A Dictionary of the English Language (S. Johnson) [index entry]
3Frederick A. Mayo to Thomas Jefferson, 15 March 1822 (Jefferson Papers)
A Dictionary of the English Language (S. Johnson) [index entry]
4Frederick A. Mayo to Thomas Jefferson, 7 April 1822 (Jefferson Papers)
A Dictionary of the English Language (S. Johnson) [index entry]
5Thomas Jefferson to Frederick A. Mayo, 14 June 1822 (Jefferson Papers)
A Dictionary of the English Language (S. Johnson) [index entry]
6Frederick A. Mayo to Thomas Jefferson, 1 September 1822 (Jefferson Papers)
A Dictionary of the English Language (S. Johnson) [index entry]