Columbia subject headings:
Ireland--History--Union, 1801.
Williams, John (Of Merton College, Oxford). Union of England and Ireland proved to be practicable.
Harvard subject headings:
Great Britain--Politics and government--18th century.
Ireland--History--18th century.
Ireland--Politics and government--18th century.
Williams, John, Esq., active 18th century. Union of England and Ireland proved to be practicable and beneficial to each kingdom.
Princeton subject headings: