- NLW MS 10898B.
- Ffeil
- 1802.
A volume entitled 'Y Gôg Lawen. Neu Lyfr Carolau a Cherddi Cywyddau ac Awdlau. Duwiol a Diddanol', being an incomplete collection, in two parts, compiled in 1802, of holograph poetry in free and strict metres by Dafydd Jones otherwise Dafydd John James ('Dafydd Siôn Siams' or 'Dafydd ab Ioan') of Penrhyndeudraeth.