- NLW MS 9215A.
- Ffeil
- 1847-1851, 1878 /
A notebook containing poems transcribed by William Roberts, Tyddyn Willim, 1847-1851, including some of his own compositions signed 'Gwilym Glan Cowlyd'; and a satire ('Yr Estron farsiand crwydrol') by 'Eidiol' with the adjudication of Ellis Roberts ('Elis Wyn o Wyrfai'), 1878.
William Roberts and Elis Wyn o Wyrfai.