This is a sample of subject headings to get you started as they relate to 18th Century British Literature:
General
English literature--18th century--History and criticism.
Literature and history--Great Britain--History--18th century.
Literature and society--England--History--18th century.
Women & Feminism
Women and literature--Great Britain--History--18th century.
Feminism and literature--Great Britain--History--18th century.
Gothic
Gothic fiction (Literary genre), English--History and criticism.
Horace Walpole
Walpole, Horace, 1717-1797--Criticism and interpretation.
Jane Austen
Austen, Jane, 1775-1817. Emma.
Austen, Jane, 1775-1817--Criticism and interpretation.
Austen, Jane, 1775-1817--Characters--Women.
Henry Fielding
Fielding, Henry, 1707-1754--Criticism and interpretation.
Fielding, Henry, 1707-1754. History of the adventures of Joseph Andrews.
Aphra Behn
Behn, Aphra, 1640-1689.
Behn, Aphra, 1640-1689. Oroonoko.
Samuel Richardson
Richardson, Samuel, 1689-1761--Criticism and interpretation.
Indentured servants in literature.
Daniel Defoe
Defoe, Daniel, 1661?-1731--Criticism and interpretation.
Defoe, Daniel, 1661?-1731. Robinson Crusoe.