Thank you for all that information. I had not looked for Baptisms for this family yet.
This is the census for 1871: Snatchwood Road Trevethin Monmouthshire Wales Registration district: Pontypool Archive reference: RG10 Piece number: 5333 Folio: 41 Page: 17

John Fervis - 25 - engine stoker at works, born Gloucestershire (Kempsford)
Sophia Fervis – 24 – dressmaker, born Monmouthshire (Pontypool)
Tom Fervis – 4 – born Gloucestershire (Oldland Common)
Annie M Fervis – 2 – born Gloucestershire (Oldland Common)
George Fervis – 1 month – born Monmouthshire (Abersychan)
Mary A Surdrey, Mother-In-Law, widow – 46 – dressmaker, born Herefordshire (“Longton” = Longtown?)
Samuel Surdrey, boarder – 19 single – stoker, born Gloucestershire (Wick)

For 1871, findmypast doesn't transcribe occupations and only the county where born; so some of what you see represents my version of the truth