A manuscript containing poetry (pp. 3-10, 54-179, 181-362), the poets cited including Iolo Goch, Dafydd ap Gwilym, Tudur Aled, Guto'r Glyn and Siôn Phylip; medical recipes taken from the texts of Meddygon Myddfai (pp. 11-16); Disgrifiad Arfau ('a Jon Trevor ai troes or Lladin ar ffrangeck yn gymraeck - August 1 . 1632' (pp. 25-53); a copy of a document relating to the boundaries of Cyfeiliog (p. 180), which bears a note at the end: 'It doeth beare date 1204 Mr. Edw: Herbert of Mountgomery had thorriginall deed in keepinge; Mr. Jenkyn gwyn and Mr. Ifan llwyd ap dd: esqrs. did copy the same per me Wythen Jones.'
The text is written in several hands, the principal hand occurring at pp. 3-10, 55-222, ?267-350, c. 1636 (see p. 219). The text was copied from a manuscript belonging to Evan Bowen of Penyrallt, Llanidloes.