Manuscript known best as the Book of Aneirin (Llyfr Aneirin'), containing the heroic poem Y Gododdin and a number of gorchanau.
- s. xiii2
Welsh lawbook, siglum W of the Cyfnerth redaction; legal records concerning the Hundred of Caerphilly.
- s. xiv1
- Anonymous [hand in Harl. 4353, Cot. Cleo. A xiv and Book of Taliesin]