Columbia subject headings:
Harvard subject headings:
Archival resources--Great Britain.
China--Foreign relations--Great Britain--Archival resources.
China--History--Daoguang, 1820-1850--Archival resources--Great Britain.
China--History--Xianfeng, 1850-1861--Archival resources--Great Britain.
Great Britain--Foreign relations--China--Archival resources.
Hong Kong (China)--History--Archival resources--Great Britain.
Princeton subject headings:
China--History--Foreign intervention, 1857-1861--Sources.
China--History--Opium War, 1840-1842--Sources.
Hong Kong (China)--History--Sources.