Columbia subject headings:
Great Britain--Foreign relations--1820-1830.
Great Britain--Foreign relations--Mexico.
Mexico--Foreign relations--1821-1861.
Mexico--Foreign relations--Great Britain.
Harvard subject headings:
Canning, George, 1770-1827.
Great Britain--Foreign relations--1820-1830.
Great Britain--Foreign relations--Mexico.
Mexico--Foreign relations--1821-1861.
Mexico--Foreign relations--Great Britain.
Ward, H. G. (Henry George), 1797-1860.
Princeton subject headings:
Canning, George, 1770-1827.
Great Britain--Foreign relations--1820-1830.
Great Britain--Foreign relations--Mexico.
Mexico--Foreign relations--1821-1861.
Mexico--Foreign relations--Great Britain.
Ward, H. G. (Henry George), 1797-1860.