Columbia subject headings:
Ireland--Emigration and immigration.
Irish--Wales--History.
Wales--Emigration and immigration.
Wales--Ethnic relations.
Harvard subject headings:
Ireland--Emigration and immigration.
Irish--Wales--History.
Wales--Emigration and immigration.
Wales--Ethnic relations.
Princeton subject headings:
Immigrants--Wales.
Irish--Ethnic identity--Wales.
Irish--Wales--History.
Irish--Wales--Social life and customs.
Wales--History--19th century.
Wales--History.