Columbia subject headings:
Famines--Ireland--History--19th century.
Ireland--Emigration and immigration--History--19th century.
Ireland--History--1837-1901.
Packets--History--19th century.
Shipping--History--19th century.
Harvard subject headings:
Famines--Ireland--History--19th century
Ireland--Emigration and immigration--History--19th century.
Ireland--History--1837-1901.
Ireland--History--Famine, 1845-1852.
Packets--Ireland--History--19th century.
Shipping--Ireland--History--19th century.
Princeton subject headings:
Famines--Ireland--History--19th century.
Ireland--Emigration and immigration--History--19th century.
Ireland--History--1837-1901.
Packets--Ireland--History--19th century.
Shipping--Ireland--History--19th century.