A small volume entitled 'Cell-gasgl Sion Lleyn, 1805', containing 'englynion' (chiefly epitaphs), stanzas in free metre including hymn stanzas, and one or two longer poems (e.g. 'Awdl ar Dosturi 1809' and 'Pillion i Dwm or Nant herwydd ei Lyfr, sef Ban y Byd - Creglais o Groglofft &c, 1809, Ebrill 27') by and in the autograph of John Roberts ('Sion Lleyn'). Other poets represented are Griffth Williams('Guttun Peris'), W. Elias and O[wen] Griffith. There is also a list of unfamiliar Welsh words ('Geiriau Cymraeg dieithrol yn amlwg'), with the following note: 'Hyn a gymerwyd o gasgliadau Thos Prys Esqur, Plas Iolun, a D. Ddu a S. Lleyn'. On p. 58 is the note 'Mai 11. 1812 Priodais' [see Cwrtmawr MS 510, p. 106].