A manuscript in the hand of Lewis Morris ('Llewelyn Ddu o Fôn; 1701-65) based on a volume entitled 'Mysteria Kabalae Bardicae' and on other sources quoted by the scribe. It contains poetry by Taliesyn, Merddin, Rhys fardd, Gronw ddu o Fon, Ll'n ap Owain, Y Bardd Cwsg, Y Ffreier Bacwn, Robin Ddu, Davydd ap Gwilim, Llowarch Offeiriad, Iolo Goch, Sr Roger y ffeiriad, Huw ap Rhisiart ap Dld, Bleddyn Fardd, Gronwy Gyrriog, Gruffyth Gryg, Alis verch Gryffyth ap Ieuan, Iefan ap Rhydderch ap Ievan Llwyd, D'd Nanmor, Gvttor Glyn, Tvdvr Aled, Sion Brwynog, Gyttvn Owain, Tvdvr Penllyn, Gruffydd Llwyd ap Davydd ap Einion, Simwnt Vychan, Sion Keri, Ieuan ap Tudur Penllyn, Llewelyn ap Guttyn, Lewis Mon, Sion ap Howel ap Ll'n Vychan, Gruff. ap Ieuan ap Ll'n V'n, Rhys Meigen, Deio ap Ieuan Du, Lewis ab Edwart, Gronw ap Ednyfed, Sion Tudr, Bedo Eurddrem, Huw Arwystl, Ll'n Brydydd Hodnant, Robt. Puw, Edward Morris (Perthi Llwydion), Huw Morys, Lewis Morris, Rhys Cain, and anonymous poetry; 'Llyma freuddwyd Grono ddu o fôn'; 'Prophwydoliaeth Ddewi'; 'Prophwydoliaeth yr Eryr o Gaer Septon'; 'Prophwydoliaeth y Doctor Banystr'; 'Prophwydoliaethau Robin ddu'; a list of, and extracts from poems, by Dafydd Lloyd ap Llewelyn ap Gryffydd; 'Araith Iolo Goch'; notes from a manuscript in the hand of Thomas Prys of Plas Iolyn; 'The British Triades' translated from a copy in the hand of Mr [Robert] Vaughan of Hengwrt; 'Achau'r Cwrw a'i Fonedd a'i Hanes'; 'Some Remarks upon the Commodities of Anglesey, & Quaere wh. ye Laziness of the Inhabitants be not a great Cause of their Poverty & Want of Trade'; 'Achau Elsbeth Brenhines Lloegr'; etc. The volume was begun in 1726, and there are some additions to the year 1759. There are a few entries by Peter Bailey Williams (1821), and also by St Geo[rge] Armstrong Williams, who has included a short biography of Lewis Morris.
