A fascinating comment has been left on an old post from 2008. Anyone interested in the story of the Welsh Language in Radnorshire should check it out, you can find it here.
The comment also draws my attention to Meic Stephens' recent autobiography Cofnodion, which I see discusses the author's Radnorshire roots - his father was born in Walton. What to make of this blurb on his publisher's site though: "an account of how the young boy from an English-speaking household grew up to be a Welshman." As Stephens was born in Treforest I would have thought he was a Welshman from the moment he gulped in a lungful of Glamorgan air.