1John Adams to Thomas Jefferson, 13 February 1819 (Jefferson Papers)
Pickering, John; An Essay on the Pronunciation of the Greek Language [index entry]
2[John Brazer] to Thomas Jefferson, 15 July 1819 (Jefferson Papers)
Pickering, John; An Essay on the Pronunciation of the Greek Language [index entry]
3Nathaniel F. Moore to Thomas Jefferson, 31 August 1819 (Jefferson Papers)
Pickering, John; An Essay on the Pronunciation of the Greek Language [index entry]
4John Brazer to Thomas Jefferson, 18 October 1819 (Jefferson Papers)
Pickering, John; An Essay on the Pronunciation of the Greek Language [index entry]