"Canada Census, 1881," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MVJ4-W5K : 11 November 2021), Joseph Desmouchel, Sainte-Cecile, Beauharnois, Quebec, Canada; from "1881 Canadian Census." Database with images. Ancestry. (www.ancestry.com : 2008); citing Joseph Desmouchel, citing Library and Archives Canada, Ottawa, Ontario.
"Canada Census, 1891," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWPQ-8XC : 3 August 2016), Joseph Dumouchel, Ste Cécile, Beauharnois, Quebec, Canada; Public Archives, Ottawa, Ontario; Library and Archives Canada film number 30953_148188.
"Recensement du Canada de 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVB7-ZN67 : 16 March 2018), Joseph Dumouchel in entry for Ovilas Dumouchel, 1911; citing Census, Beauharnois Sub-Districts 1-16, Quebec, Canada, Library and Archives of Canada, Ottawa, Ontario; FHL microfilm 2,418,540.
Find a Grave, database and images (https://www.findagrave.com/memorial/127472691/joseph-dumouchel : accessed 9 December 2021), memorial page for Joseph Dumouchel (1846–1936), Find a Grave Memorial ID 127472691, citing Le Cimetière Catholique de Valleyfield, Salaberry-de-Valleyfield, Monteregie Region, Quebec, Canada ; Maintained by Stoneman (contributor 47572378) .
Dead people are great. They may confuse you but they never argue with you.