Columbia subject headings:
British--China.
China--History--19th century.
China--History--Opium War, 1840-1842.
East India Company.
Harvard subject headings:
China--History--19th century
China--History--Opium War, 1840-1842
Princeton subject headings:
China--History--19th century.
China--History--Opium War, 1840-1842.