you can't get rid that easy

1881 RG11; Piece: 3471; Folio: 10; Page: 15
5 Builders Court Heaton Norris
Elizabeth
Gargon head widow 56 yrs hawker b Ireland
George Rigby lodger 48 yrs miller b Macclesfield
Agnes Rigby daur 10 yrs b Rochdale
Elizabeth Rigby daur 7 yrs b Rochdale
As we can't yet find a marriage to Cormick - perhaps she was just co-habiting with him. When I was searching around, there was a possibility of him in another marriage and that wife was still alive in 1871 with children - if it was indeed him.
And... this next bit
could be a bit brilliant but as ever there's a catch

1891 RG12; Piece: 2793; Folio 153; Page 14
12 Hamilton Street Heaton Norris
Elizabeth Gargan 69 yrs wardrobe dealer b Ireland
RoscommonMary

daughter 49 yrs ditto 's assistant b
Martha Raut lodger 20 yrs domestic ?? b Cheshire Budsworth
This is the catch - Mary is transcribed as Gargan , 29 yrs
It looks like 'Smith' and perhaps 49 yrs to me.
BUT - we have Roscommon!