Hi Will
You've confirmed the family I thought she'd be & father's occupation looks right:
1891: Scarborough Yorkshire
Ecclesiastical parish:All Saints
RD :Scarborough
REF: Class: RG12; Piece: 3964; Folio 47; Page 10;
ADDRESS : 90 Nelson Street
John A SLATER 36, Coal Porter, b Esleby Norfolk
Mary SLATER 31, b Brompton Yorks
Dau: Eliza SLATER 11, Scholar, b Scarboro
Dau: Emma SLATER 10, Scholar, b Scarboro
Son: Alf'd SLATER 7 (or 9?), Scholar, b Scarboro
Son: Geo' SLATER 5, Scholar, b Scarboro
Dau: Mary SLATER 4, b Scarboro
Dau: Maggie SLATER 2, b Scarboro
Dau: May SLATER 11 mths, b Scarboro
1901: Scarborough Yorkshire
Ecclesiastical parish:All Saints
RD :Scarborough
Class: RG13; Piece: 4530; Folio: 152; Page: 93
ADDRESS: 90 Nelson Street
Head: John Alfd SLATER 46. General Carter, b Coleby Norfolk
Wife: Mary SLATER 43. b Brampton Yorks
Dau: Eliza 21, unm, b Scarboro
Dau: Emma SLATER 19, unm, b Scarboro
Son: Alf'd 17, unm, (General Carter), b Scarboro
Son: George SLATER 15, (General Carter), b Scarboro
Dau: Mary SLATER 13, b Scarboro
Dau: Maggie SLATER 12, b Scarboro,
Dau: May SLATER 10, b Scarboro
Dau: Lizzie SLATER 4, b Scarboro
I think the 2 boys are supposed to be "ditto" occupation of their father in 1901; the ditto mark looks like a lowecase "z" so I'm not 100% sure on it.
Also, yhe writing is a bit poor, but it looks like John Alfred is described in 1901 as "Own A/c" - in response to question: "Employer, Worker or Own Account?"
Cheers
AMBLY