Hi Ian,
The lack of response sort of shows that they can`t be found as a family:'(
I wanted to run this one past you though as it could be worth bearing in mind.
1851 census
1 Albert Street, Rochdale
John Scowcroft, Head, M, 63, Ag LAb Labourer, Cheshire Stockport
Mary, Wife, M, 64, Wife, Middlesex London
John, Son, U, 23, Warehouse Man, Lancashire BOLTON
James, Son, U, 20, Power Loom Weaver Worsted, Lancashire BOLTON
Sarah, Daur, U, 16, Cotton Slubber, Rochdale
Same family are in Butterworth Street, Rochdale in 1841 but no sign of Mary. Although Mary was old enough to be working away or with older and perhaps married siblings. I just can`t pinpoint her. Perhaps she knocked a few years off being married to a younger man?
Regards,
Mo