Columbia subject headings:
Radicalism--England, Northern--History--19th century.
Working class--Political activity--England, Northern--History--19th century.
Harvard subject headings:
Chartism--England, Northern--History--18th century.
Chartism--England, Northern--History--19th century.
Pressure groups--Great Britain--History--18th century.
Pressure groups--Great Britain--History--19th century.
Radicalism--England, Northern--History--18th century.
Radicalism--England, Northern--History--19th century.
Working class--Political activity--England, Northern--History--19th century.
Princeton subject headings:
Pressure groups--Great Britain--History.
Radicalism--England, Northern--History--19th century.