Jenkins family of the Forest of Dean

[gjs]

I am trying to trace the marriage of John Jenkins born 1833 at Bream and an Iron Miner. In the 1871 census he is married to a Hannah Case but have been unable to trace marriage. He has three children that the census says were born at Bream John aged 11 Bertha aged13, and Elijah aged 9. Bertha age suggests another marriage before Hannah. Could anyone please help.
grahame