Columbia subject headings:
Diplomats--United States--History--19th century.
United States--Foreign relations.
United States. Navy--Officers--Political activity--History--19th century.
Harvard subject headings:
Diplomats--United States--History--19th century.
United States--Foreign relations.
United States. Navy--Officers--Political activity--History--19th century.
Princeton subject headings:
Diplomats--United States--History--19th century.
United States--Foreign relations.
United States. Navy--Officers--Political activity--History--19th century.