1851 personal census, McGillivray Twp, Middlesex Co., ON, image from Archives of Ontario:
James Simpson, Farmer, born Canada, C Methodist, 46, M, Married;
Mary Simpson, , Ireland, C Methodist, 42, F, Married;
Joseph Simpson, , Canada, C Methodist, 19, M;
Eliza Simpson, , Canada, C Methodist, 17, F;
James Simpson, , Canada, C Methodist, 15, M;
Mary Ann Simpson, , Canada, C Methodist, 13, F;
Hannah Simpson, , Canada, C Methodist, 8, F;
Catharine Simpson, , Canada, C Methodist, 10, F;
Jane Simpson, , Canada, C Methodist, 6, M;
Thomas Simpson, , Canada, C Methodist, 4, M.