1880 federal census, Bay City, Bay, MI, LDS 1880 census
household record:
McGregor Duncan, M, Married, 47, born VT, father born VT, mother born VT, Engineer in Mill;
Martha, F, wife, Married, 42, born Can, fb Scot, mb Can, Keep House;
Hellen, F, daughter, Single, 21, born MI, fb VT, mb Can, School Teacher;
Mary, F, daughter, Single, 19, born MI, fb VT, mb Can, At School;
Robert, M, son, Single, 15, born MI, fb VT, mb Can, At School;
Margaret, F, daughter, Single, 6, born MI, fb VT, mb Can;
Walter, M, son, Single, 4, born MI, fb VT, mb Can.