A volume containing texts of (a) the fuller version of 'Ystoria Dared' (pp. 1-40), translated by Peter Roberts in The chronicle of the Kings of Britain, 1811, (b) the so-called 'Brut Tysilio' or 'compiled version' of Geoffrey of Monmouth's 'Historia Regum Britanniae' (pp. 41-198), also partly translated by Peter Roberts (op. cit.), and closely allied to the text of British Museum MS Cotton Cleopatra B.v., and (c) 'Brut y Saeson' to the year 1461 (pp. 199-308). Pp. 1-88 are in a late 14th century hand; the remaining pages are in the hand of Gutun Owain, the 15th century bard and herald associated with the abbey of Basingwerk. A note, dated 1630, by Robert Vaughan, Hengwrt refers to the misplacement of many pedigrees, and another note, dated 1809, by Peter Roberts refers to the identification of the volume by William Maurice, Cefn-y-braich.