A composite volume comprising Llyfr Gweddi Gyffredin (Llundain, 1634) lacking title-page, and Llyfr y Psalmau, wedi ev cyfieithv a'i cyfansoddi ar fesvr cerdd yn Gymraeg by Edmund Prys, Archdeacon of Merioneth (Llundain, 1638) with many seventeenth- and eighteenth-century marginal and additional notes in Welsh, English, and Latin. The manuscript additions include a prayer in Welsh (Llyfr Gweddi Gyffredin B8v), verse in Welsh by Ellizabeth Price 'i dyrfa Llandanwg'(ibid 06), englynion by 'H.M.' [Huw Morus] and 'H.E.R.' (ibid Aa1v), a riddle in Latin (ibid Gg7), and entries relating to the births and baptisms of the children of Richard Poole of Tyddin y Felin, Llanfair-iuxta-Harlech, co. Merioneth (f. ii, ibid Mm2v, Llyfr y Psalmau A1v), and of Richard Vaughan, esq., of Corsygedol (f. iv verso).