Columbia subject headings:
Literature.
Harvard subject headings:
Epistolary fiction, German--18th century--History and criticism.
Last letters before death--History and criticism.
Letter writing in literature.
Letter writing--History--18th century.
Letters in literature.
Princeton subject headings:
English literature--18th century--History and criticism.
Europe--Intellectual life--18th century.
German literature--18th century--History and criticism.
Literature, Modern--18th century--History and criticism.