1881 personal census, Biddulph Twp, Middlesex Co., ON, image from Library and Archives Canada:
Isaac James, M, 36, born England, C Scotland, English, Farmer, Married;
Issac Sarah, F, 35, born Ireland, C Scotland, Irish, Married;
Isaac Mary E., F, 15, born Ont, C Scotland, English, going to school;
Isaac Andrew, M, 13, born Ont, C Scotalnd, English, going to school;
Isaac James A., M, 12, born Ont, C Scotland, English, going to school;
Isaac Ann M., F, 5, born Ont, C Scotland, English, going to school;
Isaac William, M, 3, born Ont, C Scotland, English;
Isaac Almirah, F, 10/12, June, born Ont, C Scotland, English.