The provinces of Lower Canada and Upper Canada were combined as the United Province of Canada in 1841, when The Union Act of 1840 came into force. Their separate Legislatures were combined into a single Parliament with equal representation for both constituent parts, even if Lower Canada had more population.
The Province of Lower Canada inherited the mixed set of French and English institutions that existed in the Province of Quebec during the 1763–91 period and which continued to exist later in Canada-East (1841–67) and ultimately in the current Province of Quebec (1867–).
"LABRADOR-CANADA BOUNDARY". marianopolis. 2007. Retrieved 20 March 2008. "Labrador Act, 1809. – An imperial act (49 Geo. III, cap. 27), 1809, provided for the re-annexation to Newfoundland of 'such parts of the coast of Labrador from the River St John to Hudson's Streights, and the said Island of Anticosti, and all other smaller islands so annexed to the Government of Newfoundland by the said Proclamation of the seventh day of October one thousand seven hundred and sixty-three (except the said Islands of Madelaine) shall be separated from the said Government of Lower Canada, and be again re-annexed to the Government of Newfoundland.'"
"Canadian Encyclopedia: Act of Union".
Censuses of Canada. 1665 to 1871, Statistics of Canada, Volume IV, Ottawa, 1876
Robert Christie. A History of the Late Province of Lower Canada, Quebec City: T. Cary/R. Montreal: Worthington, 1848–1855 (Internet Archive: All 6 volumes)
François-Xavier Garneau. History of Canada : from the time of its discovery till the union year, Montreal : J. Lovell, 1860 (Internet Archive: All 3 Volumes)
Media related to Lower Canada at Wikimedia Commons