The one that fitted his birth year was Mar Qtr 1848 Montgomery vol. 27 page 93.
I recieved an email from a friend over in australia who had run a search through 1891 census for my Beatrice and came up with these for me.
1891 Wales censusRG12/4361
Civil parish: Trevethin
Ecc Parish : Trevethin
Registration district:Pontypool
Sub-registration district: Pontypool
Folio: 68
Page: 19
21 North Road
John DAVIES Head Married 72 Engine Driver Monmouthshire, Pontypool
Elizabeth DAVIES Wife Married 72 Pembrokeshire
Beatrice DAVIES Grandaughter 11 Monmouthshire, Pontypool
1891 Wales censusRG12/4361
Civil parish: Trevethin
Ecc Parish : Trevethin
Registration district:Pontypool
Sub-registration district: Pontypool
Folio: 125
Page: 10
Freehold Farm
Herbert DAVIES Head Widower 56 Farmer Monmouthshire, Penalt
Maurie DAVIES Son Single 24 Blacksmith Glouc, St Georges
Arthur DAVIES Son Single 18 Farmers son Glouc, St Georges
Harriet Duffield Neice Single 28 Domestic Servant London
Edward Duffield Nephew Single 23 Ironworker London
Beatrice DAVIES Grandaughter 9 Scholar Chepstow, Monmouthshire
Lily Robins Grandaughter 7 Scholar Gloucestershire
Edward M Lewis Serv Single 14 Farm Servant Monmouthshire, Newport
1901 London censusRG13/105
Civil parish: St Marylebone
Ecc Parish : All Souls
Registration district:St Marylebone
Sub-registration district: All Souls
Folio: 7
Page: 6
30 Mortimer Street
Beatrice DAVIES Boarder Single 19 Waitress Glamorganshire, Cardiff
1901 Bershire censusRG13/1153
Civil parish: St Lawrence
Ecc Parish : St Lawrence
Registration district:Reading
Sub-registration district: St Giles
Folio: 33
Page: 5
21 Broad Street
Thomas Spindler Head Married 38 Bootmaker Bucks
Lydia A Spindler Wife Married 37 Glouc, Bristol
Gertrude M Spindler Daughter 10 Berks, Reading
Beatrice DAVIES Visitor Single 19 Chepstow, Monmouthshire
Albert J Maker Visitor Single 26 Tailor Devon
some of these look quite good prospects for her. Guess a lookup to see if any of these families had a matthew who fits the bill in previous census would be the order of the day. Proper slippery customers these Davies

both of the 1891 Beatrices are around the right age which is a start LOL
Thank you very much for the info on births for Matthew and also harriets death entry details. If it proves to be my Harriet I will send for the cert.

Del