This might be Maria.. interesting combination of occupations her hubby has....

1871 Census England London Islington
RG10/301/50/25
Brougham Road
POWELL
Alfred W Head Marr 29 Well Sinker and Baker Middlesex Islington
Maria Wife Marr 28 Middlesex Westminster
Elizabeth A Dau Unmarr 5 Scholar Cheshire Knutsford
Charles Son Unmarr 3 Scholar Middlesex Islington
Theresa Dau Unmarr 4mths Middlesex Islington
1881 Census England London St Mary Islington Islington East
RG11/278/53/5
15 Blenheim Road
POWELL
Alfred W Head Marr 38 General Labourer Hornsey Road
Maria Wife Marr 37 Cheshire Knutsford
Charles Son Unmarr 13 Hornsey Road
Theresa Dau Unmarr 10 Hornsey Road
Alice Dau Unmarr 8 Hornsey Road
Joseph Son Unmarr 6 Hornsey Road
David Son Unmarr 4 Hornsey Road
1891 Census England London Islington Upper Holloway
RG12/145/47/19
20 Nicholby? Road
POWELL
Maria Head Wid 40 Charwoman London Westminster
Joseph Son Unmarr 15 London Islington
David Son Unmarr 14 Errand Boy London Islington
Liddia Dau Unmarr 8 Scholar London Islington
John CHUBB Lodger Unmarr 30 Shoemaker Hertforshire Buzzard
There is a possible Maria POWELL in Lancashire 1901, very hard to read the entry. It looks like her occupation is Ironer and Washer... birthplace is given as Pimlico. There is an adopted son names Arthur HAGAN aged 15 born Manchester Lanc.
Cheers
Karenlee
PS Hey Dee