A composite volume containing transcripts by Edward Williams ('Iolo Morganwg') of Welsh poems, mainly strict-metre verse in the form of 'cywyddau', attributed to Syr Dafydd Owain, Huw Dafydd Llwyd, Ieuan ap Hywel Swrdwal, Llawdden, Dafydd Llwyd Matthew, Siôn Mowddwy, Rhobin Ddu 'o Fôn', Siôn Tudur, Syr Dafydd Llwyd Fach or Syr Dafydd Llwyd Ysgolhaig, Lewis Glyn Cothi, Huw Pennant, Rhosser Cyffin, Person Llanberis, Dafydd ap Dafydd Llwyd, Thomas Prys, Rhisierdyn, Gutto'r Glynn, Meredydd ap Rhys, Rhys Goch Glyndyfrdwy, Siôn Brwynog, Thomas Celli, Llywelyn Goch ap Meuryg Hen, Rhys Cain 'o Groes Oswallt', Rhisiart Philip, Rhys Llwyd ap Rhys ap Rhiccart, Hywel ap Syr Mathew, Gruff. Hiraethog, Edmund Prys, Arch[d]diacon Meirionydd, Gruffudd Hafren, Rowland Fychan 'o Gaer Gai', Ieuan Llwyd Sieffre, Ieuan Tew Brydydd, Owain ap Llywelyn Moel, Lewys Môn, Dafydd Pennant, Rhys Goch ap Dafydd sef Rhys Goch Eryri, Tudur Aled, Ieuan Brydydd Hir, Siôn Philip, Lewis ab Edward Bencerdd, Wiliam Cynwal, Ieuan Deulwyn, Gruffudd ap Gweflyn, Lewys Menai, Dafydd Llwyd 'o Fathafarn', Dafydd ap Hywel, Ieuan ap Gruffudd Leiaf, Huw Arwystli, Rhys ap Llywelyn ap Gruffudd ap Rhys, Guttyn Owain, Hywel Dafydd ap Ieuan ap Rhys, Iolo Goch, Ieuan Llawdden, Wiliam Llyn, Gruffudd Gryg, Dafydd Llwyd ab Einion Lyglyw (or Gruffydd Llwyd ab Dafydd ab Einion Lygliw, or Dafydd ab Gruffydd Llwyd ab Einion Lygliw), Dafydd ab Gwilym, Lewys Morganwg (or Lewys Brydydd Hodnant), Rhisiart ap Rhys Llwyd, Iorwerth Fynglwyd, Thomas Derllysg, Dafydd, Abad diweddaf Margam, Siôn y Cent, Thomas Lleison 'o Gastell Nedd', Ieuan Du'r Bilwg, Llywelyn Moel y Pantri, Rhys Llwyd ab Rhys ab Rhisiart 'o Lan Haran', Ieuan Rudd, Gruffudd ap Ieuan ap Llywelyn Fychan 'o Lannerch Llyweni', Meredydd ap Rhosser, Tudur Penllyn, Dafydd ap Edmwnd, Ieuan Brechfa, Syr Owain ap Gwilym, Bedo Hafes, Syr Rhys o Garno, Dafydd Llwyd ab Llewelyn ab Gruffydd, Llywelyn ab Guttyn, Trahaiarn Brydydd Mawr, ? Iorwerth Beli, Llywelyn Goch y Dant, Wiliam Pywel 'o Gastell Madog', Dafydd y Coed, Ieuan Môn Hen, Gruffudd ab Gronw Gethin, Meyrig Dafydd, Wiliam Byrcinsha, Syr Dafydd Trefor, Bleddyn Siôn 'o Lancarfan', Casnodyn, Syr Rhys Offeiriad, Llywelyn ap Guttyn, Ieuan Gethin ab Ieuan ab Lleison, Syr Dafydd Jones, Ficcer Llanfair Dyffryn Clwyd, Ifan Llwyd, and Siôn ap Ffelpot. There are occasional notes on the poems and poets and on the source of the transcript.

Transcripts by Ioan Pedr from manuscripts of Robert Jones (Tydu, Cwmglanllafar) and John Jones ('Myrddin Fardd') of 'cerddi' and 'cywyddau' by David Jones ('Dafydd Sion Siams'), Elis Roberts, Thomas Edwards ('Twm o'r Nant'), Hugh Jones (Llangwm), John Thomas (Pentrefoelas), Rice Hughes ('o Ddinam'), Owen Gruffydd, Robin Ddu, Dafydd Gorlech, John Roger, Mor[y]s ab Ieuan ab Einion, Thomas Prys, Gruffudd Hiraethog, Siôn Tudur, Guto'r Glyn, Llywelyn Goch ap Meurig Hen, Gruffudd Gryg and Dafydd ap Gwilym.

A composite volume, the first portion of which (pp. 1-78, old foliation 1-38), written in the early eighteenth century, contains selections from Flores poetarum, triads, englynion, the divisions of Wales (pp. 29-33), cywyddau, poems in free metre, and an incomplete table of the contents of the latter portion of the volume (pp. 57-59). The second part of the volume (pp. 79-406, old foliation 1-245 with gaps) has been neatly written in two or more hands, one of the seventeenth century and the others of the early eighteenth century. It contains Welsh poems in strict and free metres from the fifteenth to the eighteenth centuries, many of them either of Anglesey interest or written by Anglesey poets, particularly Lewis Môn, Sion Brwynog and John Griffith of Llanddyfnan.
Among miscellaneous items are copies of the Articles of Agreement between the Parliamentary Commissioners and the inhabitants of Anglesey, 1648 (pp. 295-296); Sir Edward Trevor's riddle (p. 312); and a short bardic grammar (pp. 358-362).

A volume containing a transcript by William Jones ('Bleddyn'), Llangollen of 'cywyddau', etc. by Edward Morus, Dr Gruffudd Roberts (Milan), Dafydd Nanmor, Dafydd ab Edmwnd, Wiliam Llŷn, Rhys Cain, Iolo Goch, Robin Ddu, Sion Brwynog, Dafydd ab Ieuan ab Owain, Cadwaladr Cesel, Ieuan Môn, Guto'r Glyn, Gruffudd ap Llywelyn Fychan, Syr Dafydd Trefor, Ieuan ap Madog ap Dafydd and Gruffudd Llwyd ap Dafydd ab Einion [Llygliw].

A collection of poems by Sr. Rhys, William Phylip, John Dafydd Las, Mr. Peter Lewis, Edward Morris, Sr. Morgans, Morus Richard, William Llyn, Tudur Aled, John Tudur, John Phylip, Edmwnd Prys, Dafydd ab Edmwnd, Iolo Goch, William Cynwal, Hugh Morris, Gutto'r Glyn, and Dafydd ap Gwilym; and a copy of a letter by Edward William, Llangower, 26 December 1829.

A volume of Welsh poetry mostly in the hand of Humphrey Davies (Wmffre Dafis), [vicar of Darowen], contining copies of cywyddau and awdlau by well-known and less known poets from the early fourteenth century to the early seventeenth century (pp. 25-492). Some poets are well represented, especially Ieuan Tew, Sion Keri and Huw Arwystl.
Twelve folios at the beginning (pp. 1-24), as well as six (formerly loose) folios at the end (pp. 493-504) are in the hand of Evan Lloyd of Blayn glyn, a former owner of the volume. These include a copy of a version of the dialogue between Hadrian and Epictetus, beginning: 'llyma ymddiddanion Rhwng adram [sic] emerodr Rhufein ag Epig y ddav wr calla yn y bvd', which differs greatly from the text found in Llyfr Yr Angkr and the Hengwrt MSS (pp. 3-7). Two other leaves (now bound in at the end of the volume), one bearing a Welsh poem in free metre (pp. 505-506) and the other an assessment of Derwen parish, [Denbighshire] (pp. 507-508), do not seem to belong to this volume.

A volume of genealogies of Anglesey families, mostly of the maternal descent. Also included are a cywydd by Ie[u]an Tew Brydydd, 'Kowydd i ofyn cyngor i'r llwynog' by Hugh Lloid (Cynfel) (pp. 156-157) and a poem in free metre, written in 1636.
Five fragments of parchment have been pasted in on pp. 171, 173, 175, 177 and 179.

A typescript essay entitled 'Casgliad o weithiau Sion Brwynog, gyda nodiadau hanesyddol a beirniadol' by the late the Reverend Gilwym H[ywel] Jones, Welsh Presbyterian minister, Blaenclydach, co. Glamorgan. The essay, under the pseudonym of 'Emrys', was awarded the prize at the National Eisteddfod at Holyhead, 1927, and pasted into the volume is a typescript copy of the adjudication of Professor Sir John Morris Jones and Professor Henry Lewis.

A draft of part of the Introduction to Vol. II of 'Gweithiau Morgan Llwyd', edited by J. H. Davies, with additional notes, and a letter addressed to J. H. Davies from C. Bryner Jones.

Three copybooks of lecture notes, 1902-1904, compiled by John Tudor of Hebron, Pembrokeshire, whilst an undergraduate at the University College of North Wales, Bangor.
The volumes include notes on Welsh poetry (1450-1600) and exercises in Hebrew grammar (NLW MS 16192iB); notes on Welsh poetry (1300-1450), notes on Welsh and Irish philology and a comparative list of Irish and Welsh words (NLW MS 16192iiB); and notes on Welsh poets of the fifteenth century (NLW MS 16192iiiB). A note from the donor is included (with NLW MS 16192iB)

A letter, in English, from Robert Vaughan of Hengwrt to James Ussher, archbishop of Armagh, concerning the dating of various historical events (pp. 1-44); and cywyddau and awdlau of Tudur Penllyn, Ieuan Tudur Penllyn and Dafydd Nanmor in the hand of Robert Vaughan (pp. 45-171).

Twelve letters (two damaged), with enclosures and part of another letter, 1869-84, to D. Silvan Evans from Edw[ar]d Hamer, Talywaun and Abersychan (Pontypool) and Llanidloes (the writer's wish to have perfect copies of two poems by Huw Arwystli [sic], the 'Llyfryddiaeth' [i.e. Llyfryddiaeth y Cymry], names of rivers in Montgomeryshire, etc., reference to the Mold Eisteddfod [1873] initiating the movement for the establishment of a National Library).

Thirty-two letters and one postcard, 1869-90, to D. Silvan Evans from Howel W[illiam] Lloyd (1816-93), Upper Chelsea and Kensington ('Y Marchog Crwydrad', mention of 'Llyfr Ceniarth', a manuscript containing poems by Huw Arwystli [sic], etc., bibliographical matters, his efforts to collect the poems of Guto'r Glyn, the addressee's dictionary).

Llangibby Castle estate records, including court rolls of manors in Monmouthshire, 1262-1911, Glamorgan, 1675-1739, Gloucestershire, 1427-1595, and Somerset, 1609-1691; title deeds, mainly Monmouthshire, 1217-1930, and correspondence, mainly 18-19 cent.; important letters and papers relating to the civil war in Monmouthshire; and manuscripts aquired by the family, including drafts and copies of Modus Tenendi Parliamentarum and Observata Parliamentaria by Henry Elsynge, junior (1598-1654), clerk to the House of Commons, together with minutes of the House of Commons, 1624-1626, calendar of the Journal of the House of Lords, 1647-1768, copies of the Journals of the House of Commons, 1547-1701, index to parliamentary proceedings, temp. Edward III-Edward IV, and, 1724-1743, civil war tracts, the journal of the missionary Dr Joseph Wolff, 1832, 'Prif Achae holh Gymru Benbaladr' in the autograph of Sir Thomas Wiliams, Trefriw, 1578-1609, a seventeenth-century collection of Welsh poetry by the principal 'cywyddwyr'; a memoir of Richard Robert Jones ('Dic Aberdaron', 1780-1843) in his own autograph; English sermons and miscellaneous notes by Rev. Edmund Jones, Pontypool, a sermon notebook of Rev. Philip Henry (1631-1696), the eminent Nonconformist divine, a survey of the lands of Henry, earl of Pembroke, in Glamorgan and Monmouthshire, 1570, and a survey of lands in the lordship of Usk, 1619; pedigree rolls of Sir Roger Williams of Penrhos, Monmouthshire, compiled by Thomas Jones ('Twm Siôn Catti'), 1591, and of the Williams family of Llangibby Castle, probably compiled by Sylvanus Morgan.

A volume containing transcripts of cywyddau and other poetry by Huw Arwystli, 'Mastr' Hywel Hir, Gruffudd Gryg, Dafydd ap Gwilym, Dafydd Nanmor, Morys ap Hywel, Robin Clidro, Guto'r Glyn, Sion Phylip, Dafydd ab Edmwnd, Gruffudd Hiraethog, Sion Brwynog, Gruffudd ab Ieuan ap Llywelyn Fychan, Edmwnd Prys, Simwnt Fychan, Wiliam Cynwal, Wiliam Llŷn, Ieuan Dew Brydydd, Hywel Ceiriog, Huw Llŷn, Owain Gwynedd, Rhys Goch Glyndyfrdwy, Tudur Penllyn, Bedo Brwynllys, Richard o'r Hengaer, Sion Cent, Raff ap Robert, Richard [Rhisiart] Gruffudd and Tudur Aled.

'Cywyddau' and other poems by John Vaughan, Wiliam Phylip, Siôn Phylip, Sion Dafydd ap Siencyn, Edwart ap Rhys, Raff ap Robert, Dafydd Nanmor, Gruff[u]dd Gr[y]g, Simwnt Fychan, Richard Phylip, Siôn Tudur, Llywelyn Goch ap Meurig Hen, Rhys Cain, Gruffudd Hiraethog, Dafydd ap Gwilym, Wiliam Llŷn, Syr David Owen, Dafydd Llwyd ap Llywelyn ap Gruffudd, Thomas Prys, Siôn Mowddwy, Wiliam Cynwal, Edmwnd Prys, Siôn Cain, Ellis Wynne, Ellis Rowland, Huw Llwyd Cynfal, Ffowc Prys, Iolo Goch, Dafydd Epynt, etc.

A seventeenth century collection of 'cywyddau' including poems by Bedo Aeldrem [sic], Dafydd ab Edmwnt, Dafydd ab Gwilym, Dafydd Nanmor, Dafydd Nanconwy, Deio ab Ieuan Du, Edmwnd Prys, Gruffydd ap Ieuan ap Llywelyn Fychan, Gruffudd ap Dafydd ap Hywel, Gruffudd Gryg, Gruffudd Hiraethog, Guto' r Glyn, Huw Dafydd Llwyd o Gynfal, Huw Arwystli, Huw ap Rhys Wyn, Huw Pennant, Hywel ap Rheinallt, Hywel Cilan, Ieuan Dyfi, Ieuan Llwyd Brydydd, Ieuan Gethin ap Ieuan ap Lleision, Ieuan Brydydd Hir, Inco Brydydd, Iolo Goch, Iorwerth Fynglwyd, Lewys Daron, Lewis Glyn Cothi, Lewys Môn, Lewis Menai, Maredudd ap Rhys, Morgan ap Huw Lewys, Morys ab Ieuan ab Eigan, Morus Dwyfech, Owain Waed Da, Rhys Goch Glyndyfrdwy, Rhys Goch Eryri, Rhys Pennardd, Rhisiart Gruffudd ap Huw, Rhisiart ap Hywel Dafydd, Robert Leiaf, Simwnt Fychan, Siôn Brwynog, Siôn Cent, Siôn Phylip, Siôn Mawddwy, Siôn Tudur, Sypyn Cyfeiliog, Syr Dafydd Trefor, Syr Huw Jones, Tudur Aled, and William Llŷn; 'cywyddau' and 'englynion' on the psalms; 'cywydd byr hanes . . . Crickieth'; an englyn by John Lloyd, Llysfasi. The manuscript belonged at one time to Lewis Morris, who filled in gaps, adding notes and some new material.

A volume of 'englynion' entitled 'llyfr wiliam Siôn o fryn saeth', and partly in the hand of David Jones ('Dewi Fardd'). Many of the 'englynion' are unattributed, and the few poets represented in the volume are William Cynwal, Lewis Glyn Cothi, Ellis ap Llew[elyn], Rhys ap Niclas, Sion Philip, Dr. Sion Siengcin, Lewis Menai, Owen Jones ('o dref machynlleth'), Sion Tudur, Thomas Eufan, Ed'd ap Raff, Wm. Sion Wyn, Da'dd Siengcin, Iolo Goch, Dafydd Jones ('o Drefriw, tan yr yw', 'Dewi Fardd', 'Dewi Sion'), Moris Powel, Hyw Morris ('ar ei glafwely'), William Philip, Owen Griffydd, Mr. Mredydd Wyn ('o lanyfudd'), and Rowlant Preis. Also bound in the volume are a list of texts of sermons, 1720-1724, preached partly by Mr. Anwill, Mr. Nanney, and Mr. Thomas; and fragments of printed almanacs, among them being that of [Thomas Jones], 1686, and that of [John Jones, 'Philomath'], 1739, both published in Shrewsbury.

'Llyfr Gwyn Mechell, sef Casgliad o Ganiadau ... wedi ei ysgrifenu gan William Bulkeley, Yswain o'r Brynddu, Llanfechell yn Mon ...', containing 'cywyddau', etc. by Sion ap Hywel ap Llywelyn Fychan, Morys Dwyfech (Morus ap Dafydd ab Ifan ab Einion), Lewis Glyn Cothi, Syr Dafydd Trefor, Gruffudd Hiraethog, Hywel [ap] Rheinallt, Dafydd ap Gwilym, Sion Tudur, Tudur Aled, Ieuan Dew Brydydd, Dafydd ab Edmwnd, Rhydderch ap Richard, Huw ap Rhys Wyn, Ieuan ap Rhydderch ab Ieuan Llwyd, Lew[y]s Môn, Sypyn Cyfeiliog, Ieuan Deulwyn, Wiliam Llŷn, Sion Phylip, Maredudd ap Rhys, Huw Pennant, Gruffudd ap Dafydd ap Hywel, Rhisiart ap Hywel, Huw Arwystli, Dafydd Manuel, Gruffudd ab Ieuan ap Llywelyn Fychan, Edward Samuel, Wiliam Cynwal, Roger Cyffin, Huw Mor[y]s, Robert Wynn ('Ficcar Gwyddelwern'), John Roger, John Davies ('Sion Dafydd Las'), Rhisiart Brydydd Brith, Simwnt Fychan, Huw Llwyd ('o Gynfal'), Iorwerth Fynglwyd, Iolo Goch, Dafydd Llwyd ap Llywelyn ap Gruffudd, Guto'r Glyn, Bedo Phylip Bach, Deio ab Ieuan Du, Rhydderch ap Sion, Edwart ap Rhys, Syr Dafydd Llwyd, John Griffith (Llanddyfnan), Elen G[oo]dman, Rhisart Gray, Huw Humphreys ('Person Trefdraeth'), Rhisiart [Richard] Bulkeley, Owen Prichard Lewis, Dafydd ap Huw'r Gô ('o Fodedern'), Rhys Gray, Edward Morus, Sion Prys, John Williams ('o Bontygwyddel'), Dafydd Llwyd (Sybylltir), Lewis Meurig ('y Cyfreithiwr'), Peter Lewis, Roger Williams, Wiliam Peilyn, Richard Abram [Abraham], Huw [Hugh] Bulkeley ('o Lanfechell') and Ifan Jones ('o'r Berthddu'); together with extracts relating to State affairs in the reign of Charles I.

A commonplace book of prose and verse, including a fragment on husbandry, recipes, a charm, astronomical and tide tables, 'Ystori Peilatvs', 'Ystori Adda', 'Ystori Noe Hen', 'Ystori Suddas', 'Araith Gwgan', an extract from Y Ffydd Ddi-ffvant, interpretations of dreams, a calendar for 1695, and poetry by Aneirin Gwawdrydd (fl. second half 6 cent.), Taliesin (fl. end 6 cent.), Hywel Cilan (fl. c. end 15 cent.), Sion Cent (c. 1400-15 cent.), Dafydd Nanmor (fl. 15 cent.), Dafydd ab Edmwnd (fl. 1450-1490), Dafydd ap Gwilym (fl. 1315/20-1350/70), Iolo Goch (c. 1320-1398), Morys ap Hywel (fl. c. 1530), Gruffudd ab Ieuan (c. 1485-1553), Sion Brwynog (d. ?1567), Sion Tudur (c. 1522-1602), Huw Morys (1622-1709), Dafydd ap Rhys (fl. c. 1550), Lewys Morganwg (fl. 1520-1565), Robert Leiaf, Guto'r Glyn (c. 1435-c. 1493), Gruffudd Gryg (fl. 1357-1370), Maredudd ap Rhys (fl. 1440-1483), Tudur Aled (c. 1465-c. 1525), Gruffudd ap Dafydd ap Hywel (fl. 1480-1520), Syr Dafydd, Rhys Cain (d. 1614), Gruffudd Llwyd ab Einion (fl. c. 1380-1410), Wiliam ap Sion ap Dafydd, and Thomas Prys (1564?-1634). Some 'englynion' and memoranda have been written in the margins by Evan Thomas, Cwmhwylfod (d. 1781).