A manuscript in three hands containing a treatise on arms addressed to Morgan Elfael (fl. c. 1528-1541) from Hywel ap Syr Mathew (d. 1581); also poetry, etc. Pp. 1-165 are in the autograph of Hywel ap Syr Mathew and were written in 1557 (cf. the writing in Peniarth MS 138 and Cardiff MS 51); pp. 167-194 are in a second hand and written about 1598; pp. 195-204 are in a third hand and were written about 1600. The poets whose works are cited include Dafydd ab Edmwnt, Siôn Cent, Gruffudd Hiraethog and Iolo Goch. The volume also contains medical recipes (pp. 166-170) and a chronicle of the reign of British rulers (p. 198).