just thought to check and the Firkins (mum, dad and grandchild) are not living in same street in 1891.
Thomas Firkins is from Worcestershire originally and Mary Firkins from Wales so at the moment can't make any connection with Stocktons.
It's becoming more pear-shaped

1881 RG11; Piece: 3767; Folio: 130; Page: 47
there is a Walter and Elizabeth Ann Bennettt living Wigan. He is a policeman and she is born St Helens 1855 (as is Elizabeth Ann Firkins who is living in manchester at same time!)
They have a son born 1876 Manchester

(Unless she was entered twice on census - can there be two Elizabeth Ann Firkins?)
1891 the family are in Ashton u Lyne with more boys. The next son after Thomas is Albert born 1883

so this can't be the mother of Herbert Callister
