Just another thought Jom, Richard Jones Snr had a daughter called Grace and when Grace got married in 1847 (see marriage details) her father Richard Snr was living at Derwen Deg!
Had Richard taken over the property when Moses died and it became unmanageable for his widow Anne Jones?
Anyway by the time of the 1851 Census Richard was not living at Derwen Deg either.
I'll see what I can do about the Baptism record for Hugh Jones but they are nothing like the one I've posted for Anne, without being disrespectful they are just like a school note book.
I'll also look at the Baptism record for Richard Jones born about 1816 just to get conclusive proof of any link to Richard Jones Snr because the last time I looked I was looking for Richard with Moses as being the father.
It might be next week before I can go back to the Archives