Columbia subject headings:
Great Britain--Foreign relations--Mexico--History--19th century.
Mexico--Foreign relations--Great Britain--History--19th century.
Harvard subject headings:
Great Britain--Foreign relations--Mexico--History--19th century.
Mexico--Foreign relations--Great Britain--History--19th century.
Princeton subject headings:
Great Britain--Foreign relations--Mexico--History--19th century.
Mexico--Foreign relations--Great Britain--History--19th century.