Columbia subject headings:
Harvard subject headings:
Diplomatic and consular service, Portuguese--History--19th century.
Portugal--Foreign relations administration--History--19th century.
Portugal. Ministério dos Negócios Estrangeiros--History--19th century.
Portugal. Ministério dos Negócios Estrangeiros--Officials and employees--History--19th century.
Princeton subject headings:
Diplomatic and consular service, Portuguese--History--19th century.
Portugal--Foreign relations administration--History--19th century.
Portugal. Ministério dos Negócios Estrangeiros--History--19th century.
Portugal. Ministério dos Negócios Estrangeiros--Officials and employees--History--19th century.