A manuscript containing a copy of Aristotle's Book of Physiognomy (originally written by Aristotle for Alexander the Great) (ff. 1-9) (cf. Jesus College MS 7, p. 48); material relating to astrology (ff. 10-26); and Traethiad Robin Moyses (ff. 26-28).
The two works contained in ff. 1-19 are copied from a manuscript written by John Jones, Gellilyfdy in 1604, which was copied by Jones from a manuscript written in 1476.

A volume, c. 1820, containing notes on the astrological practice of medicine and miscellaneous medical recipes, apparently compiled mostly from printed sources, notably Richard Saunders, The Astrological Judgement and Practice of Physick (London, 1747) and Nathaniel Williams, Pharmacopoeia, or Medical Admonitions in English and Welsh (Trevecka, 1793-6).

A composite volume in three parts, dated to the late-fifteenth century (pp. 1-32), 1650 (pp. 33-48) and the eighteenth century (pp. 49-102), containing astrological material (pp. 2, 15-16, 95-98, 26-32); names of plants in Latin and Welsh (p. 3); charms (pp. 4-6); the Paternoster, with every sentence explained (p. 7b); theological tracts (pp. 10-14); a commentary on the Prophecies, dated 5 May 1650 (pp. 33-48); fragments of Bruts (pp. 49-64, 71-74, 83-94); a list of the hundreds and commotes of Wales (pp. 99-100) and of the parishes of Carmarthenshire (pp. 101-102); etc.
On p. 6 is the note 'Gruff: llwyd ap Madoc Dd. a wnaeth y llyvyr hwnn i T. ap howel'.

A collection of medical recipes, astrological notes and diagrams, and a list of christian names. Some of the recipes and notes are in cipher. The monogram 'M.L.' occurs twice in the manuscript.

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.