A manuscript containing 'Ystoriaeu Owen ap Urien [pp. 13-56], y Llong Voel [pp. 57-64], Aristotle ac Alexander [pp. 65-75], a Saith Doethion Rhuvein [pp. 76-145]'; together with Breuddwyd Goronwy Ddu (pp. 146-153); 'Rhyveddodeu Ynys Brydein'(pp. 154-160); etc. The manuscript is in the hand of Ieuan ap Ieuan ap Madog: a note at the end of the volume states 'Ag velly y terfyna hyny o law drysgwl Jeuan ab Jayan ab madog yn y flwyddyn o ddât jessy grist . 1574' (see also Llanstephan MS 178). On pp. i-iv is a title page and table of contents in the hand of Lewis Morris.
A manuscript containing poetry by Dafydd Benwyn, Lewys Morganwg, Rhisiart ap Rhys and others (pp. 15-202, 207-210, 241-243); prophecies of Merlin and of St David (pp. 205-206); biblical history (pp. 211-240); &c. There is a table of contents on p. 204. Pp. 15-107 are in the autograph of Dafydd Benwyn (see pp. 25, 78, 81); pp. 110-203 were written c. 1624 (see p. 110); and pp. 211-240 are in the same hand as that in Llanstephan MS 134. The remaining pages are in various hands: pp. 108-109 and four lines of p. 209 may be in the autograph of Siôn Mawddwy, and pp. 241-243 may be in that of Edward Dafydd. For other copies of the text at pp. 211-240 (which is defective) see Peniarth MSS 20 and 253, and British Museum MS Cleopatra B. v.
A manuscript containing a copy of Cyfrinach Beirdd Ynys Prydain in the hand of Hugh Maurice. The text is apparently the same as that in the printed edition of 1829.
A manuscript containing the works of the medieval Welsh bards, being a transcript by William Maurice, Llansilin (see p. 492) of British Museum Addl MS 14869. Pp. 69, 119 and 141 bear respectively the dates 1September, 4 October and 6 October [16]66; however, according to an autograph statement by William Maurice at the end of Addl MS 14869 (p. 245b), he completed the transcript on 24 November 1662. Maurice notes (pp. 473-474) that the original manuscript (now known as British Museum Addl MS 14869), from which this text was transcribed, was partly written temp. Edward II and Edward III and partly temp. Henry V. In an autograph statement on pp. 473-474 William Maurice notes that this original manuscript was once in the possession of Gruffydd Dwnn (c. 1500-c. 1570), Huw Llŷn (fl. 1532-1594) and Rhys Cain (d. 1614), and subsequently came into the possession of Robert Vaughan 'or Wengraig ger llaw Dolgellau' (i.e. Robert Vaughan, Hengwrt (1592-1667)). A later note by 'M. W[illiams]' (p. 474) dated 1728 states that this original manuscript was then at Hengwrt.
