Reference: Peniarth MS 57
Poetry of Gutto ap Siancyn, Dafydd ap Gwilym and others. The first part of the manuscript is by a single scribe of the mid-15th century. The second part is by several scribes and dates from 1501 to 1540. A detailed list of the manuscript's contents may be found in J. Gwenogvryn Evans, Report on Manuscripts in the Welsh Language, vol. I (London, 1898-1905), 428-432.