Columbia subject headings:
Great Britain--Colonies--History--19th century.
Great Britain--Emigration and immigration--History--19th century.
Great Britain--Population--History--19th century.
Lobbying--Great Britain--History--19th century.
Harvard subject headings:
Great Britain--Colonies--History--19th century.
Great Britain--Emigration and immigration--History--19th century.
Great Britain--Population--History--19th century.
Lobbying--Great Britain--History--19th century.
Princeton subject headings:
Great Britain--Emigration and immigration--History.