A manuscript containing poetry (pp. 17-42), the poets including Taliesin, Iolo Goch, Dafydd ab Edmwnt and others, with poetry included also within other sections of the text; triads attributed to Taliesin (p. 16); the Rood legend (pp. 97-103); apocryphal gospels (pp. 104-153, 259-269, 272, 274-276); the Purgatory of Patrick (pp. 202-212); lives of saints (pp. 161-187); proverbs and adages, etc. (pp. 10-12, 14-15, 299-300); prayers (pp. 13, 238-250, 255); vocabulary (pp. 95-96); a planisphere, calendar, planetary tables and other astrological material (pp. 43-86, 89-90, 281-291); interpretation of dreams (pp. 91, 94); palmistry (pp. 92-93); directions concerning bleeding, medical recipes, etc. (pp. 1-9, 87-88, 236, 277-280, 300c-301); &c. A note on p. 221 states that 'Ieuan ap William ap dd: ap ejnws ajysgrivenodd yllyvr hwn i gyd ari gost ihvn i gael o bobyl ddifyrwch o hono alles yw heneidiav o hwn'; there are, however, a few pages (pp. 139-142, etc.) in other hands. There is a table of contents at the beginning in the hand of Richard Morris, 1784-1785, and another at the end by ?William Jones, who states that the manuscript was 'procured me by Mr. Holmes of the Tower'.
The dates appended to many of the subjects in the text show that the binder is responsible for the present derangement of the folios.

A manuscript containing poetry (pp. 5-18, 42-162), the poets cited including Iolo Goch, Dafydd ap Gwilym, Guto'r Glyn, Siôn Cent and Iorwerth Fynglwyd; apocryphal gospels (pp. 21-31); 'y Discibl ar Athro', which includes a brief summary of the Elucidarium (pp. 32-35); &c.
The manuscript is in several hands, with a few later additions to the text. Pp. 5-15 l. 6, 77-99 l. 9, 115-122, 131-136, 161-162 are in the same hand. The manuscript is sewn into a piece of old parchment dated 1647. Poetic marginalia occur at pp. 13, 77, 81, 82, 83, 85, 87, 93, 97, 103, 131, 146, 151. The work beginning at p. 108 is in the autograph of Rhys Cain or that of his son, Siôn Cain. The work beginning at p. 112 is apparently in the autograph of Siôn Clywedog (cf. an autograph englyn by Siôn Clywedog in the margin of p. 127). The work beginning at p. 144 appears to be in the autograph of Lewys Dwnn - cf. a note in the same hand relating to the work beginning at p. 139.

A manuscript, unusually well written for the time, containing theological tracts (pp. 1-5, 1-8); the Dialogue between Guido and the Prior (pp. 9-35); and the Gospel of Nicodemus (pp. 36-44).