Columbia subject headings:
Harvard subject headings:
France--Social life and customs--19th century.
French letters--History and criticism.
French prose literature--19th century--History and criticism.
Letter-writing, French--History--19th century.
Postal service--France--History--19th century.
Princeton subject headings:
France--Social life and customs--19th century.
French letters--History and criticism.
French prose literature--19th century--History and criticism.
Letter writing, French--History--19th century.
Postal service--France--History--19th century.