Columbia subject headings:
Assassins--Ireland--Dublin--History--19th century.
Criminal investigation--Ireland--Dublin--History--19th century.
Irish Republican Brotherhood.
Nationalism--Ireland--History--19th century.
Police murders--Ireland--Dublin--History--19th century.
Police--Violence against--Ireland--Dublin--History--19th century.
Radicals--Ireland--Dublin--History--19th century.
Harvard subject headings:
Assassins--Ireland--Dublin--History--19th century.
Criminal investigation--Ireland--Dublin--History--19th century.
Irish Republican Brotherhood.
Nationalism--Ireland--History--19th century
Police murders--Ireland--Dublin--History--19th century.
Police--Violence against--Ireland--Dublin--History--19th century.
Radicals--Ireland--Dublin--History--19th century.
Princeton subject headings: