Llyfrgell Genedlaethol Cymru = The National Library of Wales
Mostyn Manuscripts
Dafydd ap Gwilym, active 14th century
Ffeil
Saesneg Dewisiadau chwilio manwl
Transcripts of Welsh cywyddau, incorporating 'Llyfr Mr Robert Wynne o'r Berth Ddu' (p. 19). The manuscript includes blocks of poetry ascribed to Dafydd ap Gwilym (pp. 387-405) and Guto'r Glyn (pp. 652-670), and associated with Wiliam Gruffudd of Penrhyn (pp. 493-589).
A collection of awdlau and cywyddau, including a substantial section of poems ascribed to Guto'r Glyn (pp. 151-300) and Dafydd ap Gwilym (pp. 355-379). The manuscript also includes a copy of Chaucer's Treatise on the Astrolabe (pp. 87-100). Gwenogryn Evans states that pp. 1-22, 335-406 and 410-33 are written in an archaic style in the early part of the seventeenth century, while pp. 23-85, 101-33 and 151-303 belong to the last quarter of the sixteenth century. Other parts of the manuscript are later additions, except the vellum leaf (pp. 305-6).