- A1/33.
- Ffeil
- 2001.
Rhan oKyffin Williams Archive
Includes letters from John Ward (3, including an ink sketch of a woman), Derec Llwyd Morgan, Peter Prendergast (3), Keith Grant, Meic Stephens, Colin See-Paynton (4), Michael Mansfield, Alistair Crawford (2), and Eleri Mills.