It was Twm o'r Nant 's custom, having acted an interlude for a time, to have it printed and published in pamphlet form. The interludes which he wrote in his youth have disappeared, but the following have survived: Tri Chydymaith Dyn , Cyfoeth a Thlodi , Cain ac Abel , Pleser a Gofid , Tri Chryfion Byd , Pedair Colofn Gwladwriaeth , Cybydd-dod ac Oferedd , Y Farddoneg Fabilonaidd . These interludes contain a good deal of social criticism. Twm 's two main characteristics, his ready wit and his facility in versification, account for many a scathing passage in his works, and also for the fact that some of his verses remained in the popular memory for generations. (It will be recalled how Mari Lewis , in Daniel Owen 's novel, Rhys Lewis , was continually quoting ‘ Tomos o'r Nant .’) A collection of his poems, entitled Gardd o Gerddi and printed at Trevecka , appeared in 1790 . An occasional well-turned couplet in his cywyddau proves that he was conversant with the works of the 15th and 16th cent. poets . He had collected a number of manuscripts , which he sold to William Owen Pughe and which are now at the British Museum .

Twm o'r Nant was a prominent competitor in the early eisteddfodau patronized by the Gwyneddigion Society . In the eisteddfod held at Corwen in May 1789 the adjudicators failed to agree as to who should be given the prize, and the productions of Twm o'r Nant , Jonathan Hughes , and Gwallter Mechain (qq.v.) were submitted for judgement to the Gwyneddigion Society of London , who decided in favour of Gwallter . David Samwel (q.v.) , however, favoured Twm , and sent him a silver writing-pen as a consolation prize. Twm was again unsuccessful at the eisteddfod held at Bala in Sept. 1789 , but he staged an interlude in the town for a few days after the eisteddfod. In 1790 , at S. Asaph , he was given the prize for extempore verse-writing , but won nothing at Denbigh in 1792 or at Caerwys in 1798 .