- A1/27.
- Ffeil
- 1995.
Rhan oKyffin Williams Archive
Includes letters from John Sergeant, Colin See-Paynton (5), Barry Jones (2), David Burnett (4), Meg Stevens (4), Anthony Green, Ivor Davies (2), R. S. Thomas, Eiluned Rees, David Carpanini, Alistair Crawford, John Elwyn, and Nicholas Edwards (3).