Columbia subject headings:
Cartwright, John, 1740-1824--Correspondence.
Clarkson, Thomas, 1760-1846--Correspondence.
Great Britain--Politics and government--1800-1837.
Harvard subject headings:
Cartwright, John, 1740-1824--Correspondence.
Clarkson, Thomas, 1760-1846--Correspondence.
Great Britain--Politics and government--1800-1837.
Princeton subject headings: