An imperfect, composite manuscript consisting of transcripts, in a number of hands of the late sixteenth and seventeenth centuries, of miscellaneous prose and verse items including Welsh poems in strict metre by Edward Dafydd, Dauudd Edward, Davydd William, 'viccar Penllin', Lewis Mfln, Thomas ap Rys 'o blas jolyn', Phillipp Pwell, John Tudur, Dauidd ap Gwilym, Robin Ddv, Gruffydd ap Iefan, John Philipps, Iolo Goch, Thomas Derllysc, Gruffydd Gryg, Siôn Cent, Richard Kynnwal, Huw Machno, Robert Dyfi, and Kadwalader Kesel, two versions of the code of rules for regulating the craft and conduct of the Welsh bardic order generally attributed to Gruffudd ap Cynan, a copy of 'The order of the funerall of John Conway of Botruthan in the Countie of Flint, Esquier, who was intered in Rithlan the 23th of December 1606', a prophesy entitled 'The prophesie of Gre[ ]' (Latin), and a short sequence of Welsh triads. Some of the leaves bear contemporary foliation indicating that they formed sections of other manuscripts. An inscription in the hand of Edward Williams (Iolo Morganwg) on the previous upper cover lists the contents of the volume, and, from this list, it appears that a section containing an account of Gruffudd ap Cynan's sojourn in Ireland in 1098 ('Hanes Gruffudd ap Cynan yn y Werddon yn y flwyddyn 1098') has been lost since the time the inscription was written. There are a few marginal annotations by Iolo Morganwg.

A composite volume consisting of two incomplete manuscripts written by several mid-seventeenth century scribes and containing Welsh poetry mostly in strict-metre.
It comprises: (a) pp. 1-498, 595-622 (many misplaced leaves, the original order being pp. 615-616, 179-186, 37-38, 595-598, 619-622, 599-602, 35-36, 1-34, 39-178, 187-432, 603-614, 433-498) mainly in the hands of Richard Cynwal (pp. 37-38, 179-186, 615-619) and an unidentified mid-seventeenth century scribe, containing Welsh poetry addressed mostly to the Maurice family of Clenennau and related families, including those of Bryncir; Wern, Penmorfa; Craflwyn, Beddgelert; Ystumcegid and Corsygedol; (b) pp. 499-594 in the hand of an unidentified mid-seventeenth century scribe, containing Welsh poetry addressed to families of north-east Wales, particularly those of Eutun of Leeswood and Lloyd of Bodidris. Poems, probably holograph, by Ellis Rowland, Jane Vaughan of Caer Gai and William Wynne are tipped in at the end of the volume (pp. 623-625).

A volume containing Welsh poetry in strict and free metre, including a poem dated 1627 (f. 280), in an unidentified hand of the early seventeenth century; the same hand also wrote NLW MS 6471B and Jesus College, Oxford MSS 139 and 140.
The scribe was copying from at least six different manuscripts, the beginnings and ends of which he usually indicates, e.g. 'dechre llyfyr Mr Iohn peers' (f. 1), 'dechre llyfyr arall (ff. 60 verso, 225 verso) and 'diwedd i llyfr yma' (ff. 135, 225 verso). Books begin on ff. 1, 60 verso, 105, 135 and 225 verso; the sixth book probably began in the gap resulting from the excision of leaves between ff. 245 and 246. Additions include a poem, dated 1630, written in a contemporary hand on ff. iii-iv; englynion on ff. iv verso, and on f. 176 verso, probably in the hand of Lowry Evans; verses in free metre in an early-nineteenth century hand tipped onto f. 305; and a subject index of contents of the volume when it was complete in a hand of the second half of the seventeenth century on ff. 306-310.

'Cywyddau' and other poems by Guto'r Glyn, Sion Brwynog, Wiliam Llŷn, Dafydd Llwyd ap Llywelyn ap Gruffudd, Llywelyn ap Gutun, Huw Arwystli, Sion Tudur, Edmwnd Prys, Wiliam Cynwal, Tudur Penllyn, Hywel Borthor ('o'r Trallwm'), William Myddelton, Owain Meurig, Wiliam Burchinsa[w], Mor[ri]s [K]yffin and Edward [K]yffin, transcribed by Thomas Jones, Trawsgoed, Llanuwchllyn.

A miscellany of prose and verse begun by Robert Edmund, corvizer, Bala. It includes 'englynion' by David Thomas ('Dafydd Ddu Eryri') [1759-1822], 1784-1792, Rolan[t] Huw [1714-1802], Evan [Evans] 'Fardd ac Offeiriad' ['Ieuan Fardd' or 'Ieuan Brydydd Hir'] [1731-1788], Robert Lewis, Robert Edwards, Sion Brwynog 'o Edeyrnion' [d. ?1567], Evan Ellis (Llanfawr, 1791), John Williams (Dolgellau), W[illiam] Jones (Llangadfan) [1726-1795], Thomas Jones, J. Robert, Rice Jones, Rhobert Gwilym and Robert Edwards (Llandderfel); a hymn by Walter Davies ('Gwallter Mechain') [1761-1849], with a letter and 'penillion' by David Jones ('Dafydd Sion Siams'); 'cywyddau' by Evan Ellis, 1791-1793, Robert William [1744-1815], Maredudd ap Rhys [fl. 1440-1483], Tudur Aled [c. 1465-c. 1525], Edward ap Raff [fl. 1587], Hugh Hughes ['Huw ap Huw' or 'Y Bardd Coch o Fôn'] [1693-1776], John Prys (Cae'rddinen), John Roberts (Tydu, 1782-1787), Rhys Jones ('o'r Blaenau', 1789), William Jones (Llangadfan) and Walter Davies; 'awdlau' by Robert William, Pandy, 1793, John Williams alias Shon Cynwyd, 1792, Rowland Huw and Rhys Jones 'o'r Blaenau' [1713-1801]; a copy of the first twelve chapters of Rhetoreg ... by Henry Perry [1560?-1617]; copies of letters by John and Evan Robert, 1793-1794; correspondence concerning Llandderfel, 1843; an extract from the will of 'Mr. Meyrick' relating to a charity school at Bala.

An imperfect copy, lacking title-page, and all following f. cxxxvi, of an unidentified early sixteenth-century printed edition of the Latin Decretales of Gregory IX. The text ends at the beginning of c. 1, X, De fideiussoribus, III, 22. Preceding the Decretales are sixteen originally-blank paper leaves, and a vellum leaf containing a fragment of a medieval Latin text, in a XIII cent. hand, originally used as a front pastedown, now raised and left as a fly-leaf. The covers bear blind-tooled rolled decorations of Oldham's 'heads in medallions' type, similar to his HM. h (29), identified as a London production of 1533-44; see further J.B. Oldham, English Blind-Stamped Bindings (Cambridge, 1952), 54 & plate L.
The volume was owned at the end of the sixteenth or beginning of the seventeenth centuries by 'Lewis Johnes', who added his name on ff. 16, xlvv, xlvi and inside rear cover. He also added pen trials and Welsh poetry to the sixteen preliminary blank leaves. The poems include an early cywydd attributed to Siôn Tudur (c. 1522-1602) (ff. 9 verso-10), a text seemingly first attested in Cardiff MS 2.114 of 1564-5, see Enid Roberts, Gwaith Siôn Tudur (Caerdydd, 1980) I, 672; an incomplete cywydd, attributed elsewhere to Gruffudd ab Ieuan ap Llywelyn Fychan (c. 1485-1553) (f. 12); and a series of 37 englynion of gnomic type, each beginning with 'Eira mynydd ...' (ff. 5 verso-9). These englynion are not among those appearing in Oxford Jesus College MS 111 (Llyfr Coch Hergest), col. 1028-9 (see Kenneth Jackson, Early Welsh Gnomic Poems, Cardiff, 1935, 22-6), and their form and contents suggest that they are later-dating imitations of the genre, seemingly unattested. The name of Lewis Johnes (or Jones), again in a late sixteenth- or early seventeenth-century hand, also appears in the first part of NLW MS 5283B (pp. 7, 98, 119, 126, 161, 166 and 170), a collection of cywyddau, mostly written in his hand, which begins with the above-mentioned poem attributed to Siôn Tudur. Johnes' legal connection, exemplified by his ownership of the Decretales, may also be reflected in the legal script which he adopts when writing his name on pp. 98 & 126 of this manuscript, a volume which also bears the names of Evan Johnes (p. 166), Hughe Johnes (p. 55) and Harry Jones (pp. 13, 43, 88, 140), possibly kinsmen.

'A Collection of Welsh Pennillion, etc.', in the hand of Richard Williams, Denbigh, 10 November, 1814, containing 'penillion telyn', 'englynion', and extracts from 'cywyddau' by Siôn Brwynog, Wiliam Llŷn, Goronwy Owen, Lewis Morris ('Llywelyn Ddu o Fôn'), Robert Davies ('Bardd Nantglyn'), John Jones ('Jac Glanygors'), and John Cain Jones ('Siôn Ceiriog'). Among the titles are '3 Englyns written in Peblig Churchyard', 'Englynion i Gorph y gaingc', and 'Englyn in praise of West in the Denbigh Election 1820' (with a reply).