Lower Canada was a British colony from 1791 to 1840. Its geographical boundaries comprised the southern portion of present-day Quebec. In 1791, Britain divided the Province of Quebec into Upper Canada and Lower Canada. (See: Constitutional Act 1791.) Britain had followed a similar policy of territorial division twice before. Prince Edward Island was detached from Nova Scotia in 1769. The provinces of Cape Breton and New Brunswick were created in 1784 in response to the wave of Loyalist immigration (which also occurred in Quebec). In 1841, Upper Canada and Lower Canada were renamed Canada West and Canada East, respectively. They were united as the single colony of the Province of Canada.