An imperfect, late seventeenth century manuscript in the hand of Thomas ab Ieuan of Tre'r-bryn, parish of Coychurch, co. Glamorgan, the scribe of NLW MSS 13061-13063B, 13069B (see TLLM, tt. 153, 171). The main item in the volume is a Welsh - Latin list of plants, herbs, etc., which is a transcript, incorporating some additions and variations, of the section headed 'Botanologium' in John Davies: Antiquae Linguae Britannicae . . . et Linguae Latinae Dictionarium Duplex . . . (Londini, 1632) (see TLLM, tt. 153, 171; and IMCY, t. 176). This list is imperfect owing to the very fragmentary nature of the first five folios. Also included are transcripts of Welsh prose items dealing with the magical attributes of a snake's skin ('Yr amriw rhinweddav ar amrafael gywrainrwydd a sydd ar groen naidr'), and with human physiology, this second item being incomplete owing to the loss of the end folio(s).