Columbia subject headings:
Christian saints--Ireland--Biography.
Great Britain--Church history--449-1066.
Ireland--Church history--To 1172.
Missions, Irish.
Missions--Europe.
Harvard subject headings:
Christian saints--Ireland--Biography
Great Britain--Church history--449-1066.
Ireland--Church history--To 1172.
Missions, Irish.
Missions--Europe
Princeton subject headings:
Christian saints--Ireland--Biography.
Church history--Middle Ages, 600-1500.
Great Britain--Church history--449-1066.
Ireland--Church history--To 1172.
Missions, Irish--Europe.