Reference: Peniarth MS 137
A manuscript in several 16th century hands, including that of John ap Rhys, comprising prophecies attributed to Merlin, Taliesin and others; poetry of Tudur Aled; pedigrees; the Divisions of the Lordship of Powys; and the Blessed Oil. Various dates occur in the manuscript, for example 1541 (p.183) and 1588 (p.219); other leaves were written temps Henry VIII and Elizabeth I. A detailed list of the manuscript's contents may be found in J. Gwenogvryn Evans, Report on Manuscripts in the Welsh Language, vol. I (London, 1898-1905), 861-867.