- A1/12.
- Ffeil
- 1980.
Rhan oKyffin Williams Archive
Includes letters from Allan Gwynne-Jones, John Ward, Ivor Roberts-Jones (2), Richard Eurich, Eiluned Rees (5), Charles Oman, Robert W. Steel (2), Peter Cannon-Brookes, Moelwyn Merchant, Peter Jones (2), Gareth Alban Davies, and Gwilym O. Williams (2).