HI
I note that on the 1841 census piece 1372 book or folio 18/17 page 1
Peter Richards b 1806
Elizabeth b 1811
William b 1832
Richard b 1834
David b 1839
The address given is Argoed fach this must be a house cottage or hamlet, Llanfihangel Geneur Glyn is the Parish and Cynnull mawr is the township
Having my own great grandparents and other family going way back When you say he gives born llanfihangel then later states Argoed fach it is the same area! do I make sense
Familysearch.org
William Richards b 7th March 1832
Christened 27th March 1832 Llanfihangel Genaur Glyn Bethel Independant Tal-y-bont cardiganshire
Father- Peter Richards
Mother - Elizabeth owen
His brother
Richard Richards b 2nd Jan 1834
christened 2nd Feb 1834 place as brother above
parents as brother above
I note that parish records for this church is 1805 - 1837
I am assuming this is the chapel you requested on another topic

I cannot find either John or his brother David's christening...
sometimes you find that later children where not christened.
just a thought
cheers cardiff