Columbia subject headings:
Africa--Commerce--Great Britain.
Great Britain--Commerce--Africa.
Slave trade--Africa--History--18th century.
Slave trade--Great Britain--History--18th century.
Harvard subject headings:
Africa--Commerce--Great Britain.
Great Britain--Commerce--Africa.
Slave trade--Africa--History--18th century.
Slave trade--Great Britain--History--18th century.
Princeton subject headings: