Columbia subject headings:
Ireland--Emigration and immigration--History--19th century.
Irish--Great Britain--History--19th century.
Harvard subject headings:
Ireland--Emigration and immigration--History--19th century.
Irish--Great Britain--History--19th century.
Princeton subject headings:
Irish--Great Britain--History--19th century.
Irish--Great Britain--History--20th century.
Irish--Great Britain--Social conditions--19th century.
Irish--Great Britain--Social conditions--20th century.