Thomas Roberts M.A. of Porthmadog, Caernarfonshire is the co-editor of several published anthologies of early Welsh poetry, including Cywyddau Dafydd ap Gwilym a'i gyfoeswyr (1914), The poetical works of Dafydd Nanmor (1923) and Cywyddau Iolo Goch ac eraill (1925). He appears to have worked closely with Sir Ifor Williams, the renowned Welsh scholar, on several occasions.
From the guide to the Thomas Roberts, Porthmadog Manuscripts, c. 1920 [transcripts of 14th and 15th century Welsh poetry], (Bangor University)