Columbia subject headings:
Harvard subject headings:
Famines--Ireland--History--19th century
Ireland--Emigration and immigration--History--19th century.
Ireland--History--19th century.
Irish--Australia--History--19th century.
Irish--United States--History--19th century.
Political prisoners--Australia--History--19th century.
Political prisoners--Ireland--History--19th century.
Prisoners--History--19th century.
Prisoners--Ireland--History--19th century.
Princeton subject headings:
Famines--Ireland--History--19th century.
Ireland--Emigration and immigration--History--19th century.
Ireland--History--19th century.
Irish--Australia--History--19th century.
Irish--United States--History--19th century.
Political prisoners--Australia--History--19th century.
Political prisoners--Ireland--History--19th century.
Prisoners--History--19th century.
Prisoners--Ireland--History--19th century.