Columbia subject headings:
Harvard subject headings:
Great Britain--Politics and government--1760-1789--Manuscripts--Catalogs.
Great Britain--Politics and government--1760-1789--Sources--Bibliography--Catalogs.
Manuscripts, English--England--Sheffield--Catalogs.
Rockingham, Charles Watson-Wentworth, Marquis of, 1730-1782--Manuscripts--Catalogs.
Sheffield City Libraries--Catalogs.
Whig Party (Great Britain)--History--Sources--Bibliography--Catalogs.
Whig Party (Great Britain)--Manuscripts--Catalogs.
Princeton subject headings:
Great Britain--History--18th Century--Sources.
Great Britain--History--Stuarts, 1603-1714--Sources.
Wentworth family--Archives.