Hey
I unfortunatly dont have a marriage cert, this is all from family knowledge. They address was possibly 45 Aberrhondda road, Porth but im not 100% sure.
John's occupation could possibly have been a Coal Miner, have no idea of Sarah's fathers name but know that he also ran the Coal Merchant business so it would possibly show as Coal Merchant on the marriage cert.
This is most possibly John in 1911 (he was born in 1894 but this is nearest to him)
HOUSEHOLD DAVIES JOHN MORGAN M 1895 16 Pontypridd Glamorganshire
way too many Sarah Morgan's for me too possibly point out and i know little info on her sadly

Lyndsey