21Frederick A. Mayo to Thomas Jefferson, 5 May 1821 (Jefferson Papers)
Post Office, U.S.; and mail service [index entry]
22John F. Oliveira Fernandes to Thomas Jefferson, 27 August 1816 (Jefferson Papers)
Post Office, U.S.; and mail service [index entry]
23Horatio G. Spafford to Thomas Jefferson, 6 April 1815 (Jefferson Papers)
Post Office, U.S.; and mail service [index entry]