Peniarth 164 [SEP] collection
Chirk (Peniarth 29), and remained so until after 1869. Manuscript H includes the transcript of the Black Book of Chirk that was partially copied by John Jones in Llanstephan 121. Llanstephan 121 also includes sections of the Ancient Laws from Peniarth 278, which is transcription of the Black Book of Chirk in the hand of Robert Vaughan. 
Peniarth 164 is kept at the National Library of Wales in the Peniarth Manuscripts Collection.
Further reading.
Roberts, S. E., ‘Law Texts and their Sources in Medieval Wales
c.1225–75) of parts of the Four Branches of the "Mabinogi".
- Peniarth 20
- History of the Kings (Peniarth 23C)
- Peniarth 28
- Peniarth 32
- Peniarth 49
- Peniarth 51
- Peniarth 53
- Peniarth 109
- Peniarth 164
- Peniarth 259B
- Peniarth 481
- Vaux Passional (Peniarth 482D)
See also.
A list of Welsh Law manuscripts
Bibliography.
- J. Gwenogvryn Evans, "Reports on Manuscripts in the Welsh Language