In the 1851 Census of Canada East, Canada West, New Brunswick and Nova Scotia
Mosa Township, Middlesex County, Canada Werst
George Simpson, farmer, born England, Church of England, age 39
Sarah Simpson, born Irland [as spelled], age 38
William H. Simpson, born Canada, age 14
John Simpson, born Canada, age 12
James Simpson, born Canada, age 10
Charles S. Simpson, born Canada, age 3
[next family George’s brother William and family]
william Simpson, farmer, born England, Free Church, age 36
Cathrin [as spelled] Simpson, born Irland [as spelled], age 27
Agnus [as spelled] Simpson, born Canada, age 3
Thomas Simpson, born Canada, age 2

In the 1861 census of Canada
District No. 3 ward, Mosa Township, Middlesex County, Canada West [Ontario]
William Simpson, farmer, born England, Episcopal Methodist, age 43, married
Catherine Simpson, born Ireland, age 36, married
Agnes Simpson, born Upper Canada, age 12
Thomas Simpson, labourer, born Upper Canada, age 11
Robert Simpson, born Upper Canada, age 9
Mary M. Simpson, born Upper Canada, age 7
Jane simpson, born Upper Canada, age 5
Isaac J. Simpson, born Upper Canada, age 2
Elizabeth A. Simpson, born Upper Canada, age1
[next family, William and George were brothers]
George Simpson, farmer, born England, Churchof England, age 49, married
Sarah Simpson, born Ireland, age 49, married
William H. Simpson, born Upper Canada, age 23, single
John Simpson, born Upper Canada, age 21, single
Charles Simpson, born Upper Canada, age 12