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 manuscript in the autograph of Evan Evans (Ieuan Fardd) containing vocabularies with (sometimes speculative) meanings, including terms taken from Brut y Tywysogion (pp. 69-76), names of fish (pp. 88-91), birds (pp. 93-105), etc., with illustrative quotations from poetry, myth, etc., throughout. Also included are attempts at explaining the origin of the names of rivers and places (pp. 59-68) and the origins of Welsh customs (p. 83), and a Latin-Welsh vocabulary (pp. 77-80).