1Thomas Cooper to Thomas Jefferson, 12 July 1820 (Jefferson Papers)
Memoirs of Dr. Joseph Priestley, to the year 1795, written by himself (J. Priestley) [index entry]
2Thomas Cooper to Thomas Jefferson, 1 March 1820 (Jefferson Papers)
Memoirs of Dr. Joseph Priestley, to the year 1795, written by himself (J. Priestley) [index entry]
3Thomas Cooper to Thomas Jefferson, 24 April 1820 (Jefferson Papers)
Memoirs of Dr. Joseph Priestley, to the year 1795, written by himself (J. Priestley) [index entry]