Hi Dave, sorry I haven't got back to you sooner but I have been nursing a twisted knee for the last couple of weeks

and didn't feel like doing much on the family history front.
Yep, I think this is them all right,

as John was living at Crosswinter fach, in Llan Trefeg when he was married, in 1872. Also one of the witnesses was Evan Jones, his brother. He wouldn't have been listed in 1841 as he was born about 1846. 'though I have yet to find his birth certificate.
In the 1841 census does it say where abouts in Cardiganshire Roderick and Jane where Born ?
I haven't been able to pick them up in either the 1851 or 1861 census as yet but live in hopes.
Regards Dave