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).