- A1/11.
- Ffeil
- 1979.
Rhan oKyffin Williams Archive
Includes letters from Henry Paget (Marquess of Anglesey, 3), John Ormond (4), R. Vivian Pitchforth (3), Laurence Whistler (2), David Jenkins (2), Karl Theodore Parker, John Betjeman, Tim Jeal, Evan Charlton, R. Charles Evans, Bruce Campbell, Eiluned Rees, Bernard Dunstan, and Diana Armfield.