Neville C. Masterman research letters,
- B3/3.
- Ffeil
- 1971-1993 (accumulated 1971-1979).
Letters received by Neville C. Masterman, 1971-1993 (accumulated 1971-1979), concerning his research into the life and political career of W. Llewelyn Williams, comprising letters from various correspondents, including Gwynfor Evans, referring to the location of various sources of information.
Evans, Gwynfor