Columbia subject headings:
Diplomatic and consular service, British--History--Congresses.
Great Britain. Foreign Office--History--Congresses.
Harvard subject headings:
Diplomatic and consular service, British--History--Congresses.
Great Britain. Foreign Office--History--Congresses.
Princeton subject headings:
Diplomatic and consular service, British--History--Congresses.
Great Britain. Foreign Office--History--Congresses.