Welsh manuscript collection of religious texts, mainly in the hand of Hywel Fychan. Other parts of the original manuscript are in Peniarth MS 12 and Cardiff MS 3.242.
- Hywel Fychan ap Hywel Goch
- s. xii / s. xiii
Manuscript known best as the Book of Aneirin (Llyfr Aneirin), containing the heroic poem Y Gododdin and a number of gorchanau.
- s. xiii2
- s. xvimed