Columbia subject headings:
Convict labor--Australia--History--19th century.
Penal colonies--Australia--History--19th century.
Penal colonies--Great Britain--History--19th century.
Harvard subject headings:
Convict labor--Australia--History--19th century.
Penal colonies--Australia--History--19th century.
Penal colonies--Great Britain--History--19th century.
Princeton subject headings:
Convict labor--Australia--History--19th century.
Penal colonies--Australia--History--19th century.
Penal colonies--Great Britain--History--19th century.