Culhwch ac OlwenIdris Llewelyn Foster, Rachel Bromwich, D. Simon Evans · First published 1988Open the Tome
Twf fr EisteddfodIdris Foster, Helen Ramage, Melville Richards, Frank Price Jones · First published 1968Open the Tome
Cyfrol deyrnged Syr Thomas Parry-WilliamsT. H. Parry-Williams, Idris Llewelyn Foster · First published 1967Open the Tome
Culture and environment, essays in honour of Sir Cyril FoxIdris Llewelyn Foster · First published 1963Open the Tome
The book of the anchoriteIdris Llewelyn Foster · First published 1950 · Latest edition 1952Open the Tome
