How's this?

I looked for a GAVIN and found a mother in law ... he was indexed as PRISTH

8 Robinson St West, Grimsby
John SMITH (wid) 36 Gen Lab
Thomas William 9
Margaret Ellen 8
John 1
William DOWS (bro in law,wid) 26 Gen Lab, Retford Notts
William Thomas (neph) 3
James Henry (neph) 1
Mary GAVIN (ma in law,wid) 66 Ireland
Mary Ann McCABE (niece) 24 Housekeeper
George BOWEN (lodger) 38 Gen Lab, Wales Newport
Others born Grimsby
Now if Ellen died in 1885, who was young John's mum?
EDIT: Doh! I think it's Mary Ann McCABE isn't it?