An 1851 Canadian census showing Alexander August "August" Voisin [I02072] and his mother Marianne "Maria Anne" Voisin [I02041]. They are listed among several merchants, so this is probably a census taken within the village of Waterloo. They were apparently living with the Conrad Gonder family in a two-story brick and frame building that was a cooper shop (shared by two families).

Waterloo Township, Waterloo County, Ontario, Canada

Source: 1851 Census, Canada West, Waterloo Township, Waterloo County, Ontario, Canada, district 3 Waterloo Township, Waterloo County, Page 149 or 17, Lines 25 - 26, August Voisen ; digital images, Library and Archives Canada, Censuses (http://www.bac-lac.gc.ca/eng/census/Pages/census.aspx : downloaded 12 November 2017).