Copi o gyfrol John Davies, Mallwyd, Antiquae Linguae Britannicae...et Linguae Latinae, Dictionarium Duplex (Llundain: R. Young, 1632, STC 6347), gyda nodiadau helaeth, [1632x1667], yn llaw Robert Vaughan, Hengwrt, yn cynnwys yn bennaf eiriau (ff. 9-66 passim) a diarhebion (ff. 191-195 passim) Cymraeg ychwanegol. = A copy of John Davies of Mallwyd's Antiquae Linguae Britannicae...et Linguae Latinae, Dictionarium Duplex (London: R. Young, 1632, STC 6347), with extensive annotations, [1632x1667], in the hand of Robert Vaughan of Hengwrt, comprising mostly additional Welsh words (ff. 9-66 passim) and proverbs (ff. 191-195 passim).

A transcript by John Thomas ('Sion Wyn o Eifion') of cywyddau and other poems by Robin Ddu, Rhys Goch Eryri, Iolo Goch, Tudur Aled, Dafydd Gorlech, Dafydd Llwyd ap Llywelyn ap Gruffudd, Dafydd ap Hwlcyn ap Madog, Rhys Llwyd ap Rhys, Maredudd ap Rhys, Mathew Owen, Edward Morus and Sion Lleyn; the manuscript also contains triads, genealogies, 'Breiniau Gwŷr Arfon', 'Meddygon Myddfai', 'geirlyfr William Lleyn', etc.

An imperfect copy of John Davies [Mallwyd]: Antiquae Linguae Britannicae ... et Linguae Latine Dictionarium Duplex, 1632, with marginal notes consisting of medical prescriptions and poetry.

Pedigrees, mainly of North Wales families; a list of uncommon Welsh words taken from John Davies, Mallwyd: Dictionarium ... (London, 1632); a vocabulary of some 'hard' Latin words; 'cywyddau' and other poems by Rowland Williams, Rhys Meigen, Dafydd ap Gwilym, Rowland Vaughan, Siôn Cent, Dafydd ab Edmwnd, Wiliam Phylip, Owen Gruffydd, Edmwnd Prys, Robin Ddu, Siôn Phylip, Sion Tudur, Gruffudd Phylip, Maredudd ap Rhys, Gutun Owain, Iolo Goch, Morus Berwyn, Ffowc Prys, Owain Gwynedd, Roger [C]yffin, Siôn Brwynog, Syr Owain ap Gwilym, Wiliam Llŷn, Huw Arwystli, Richard Phylip, Dafydd Nanmor, [If]an Llwyd ('o wain Eingian'), Hywel Cilan, Edwart Urien, Lewis Glyn Cothi, Rhys Cain, Lewis Trefnant, Matthew Brwmffild, James Dwnn, Ieuan Dew Brydydd, Heilyn Fardd, Huw Machno, Guto'r Glyn, etc. ; a description of Britain based on the early chronicles; the triads of Dyfnwal Moelmud; etc.

A volume containing the first part of a transcript (continued in Brogyntyn I.10) by John Edwards, Plas Newydd, Chirk, of part of Thesaurus Linguæ Latinæ et Cambrobritannicæ... by 'Syr' Thomas Wiliems, Trefriw (now NLW Peniarth MS 228).
The volume contains the title page, dated 1608, the list of authorities cited, 'Prif Gaerae Ynys Brydain gynt', 'Tri dyfal gyfangan', and the dictionary from A to D. The contents correspond to Peniarth MS 228, vol. i, except that Thomas Wiliems's preface is wanting, probably as a result of six leaves being excised at the beginning of the volume between ff. iv and v. The text is written in a neat italic hand, two columns on each page; the Latin words are written in red ink, the Welsh definitions in black, quotations from Welsh literature in green, and the names of authors and titles of the works quoted in purple. According to a note on f. iv John Edwards paid nine shillings for paper for his transcript in 1607; he probably commenced transcribing soon afterwards in 1608, which is the date written on Thomas Wiliems's title-page, although Wiliems completed his dictionary on 2 October 1607. The monograms 'IHS' and 'MRA' on ff. v and 1 and 'Emanuell IHS' on f. iv indicate that John Edwards, like Thomas Wiliems, was a Roman Catholic. Because of his refusal to take the Oath of Allegiance in 1613 two-thirds of Edwards's estate was confiscated, which resulted in his being involved in litigation until the end of his life, a situation which probably explains why he abandoned transcribing the dictionary.

'Geirlyfr William Lleyn'; 'Bardhoniaeth ... William Middelton'; pedigrees and arms, mainly of North Wales families; 'cywyddau', 'awdlau', etc. by Adda Fras, Iolo Goch, Maredudd ap Rhys, Robin Ddu, Rhys Nanmor, Gwilym ab Ieuan Hen, Dafydd Gorlech, Tudur Aled, Gruffudd ab Ieuan ab Llywelyn Fychan, Wiliam Llŷn, Sion Cent, Sion Tudur, Thomas Prys, Lewis Menai, Gruffudd Phylip, Richard Cynwal, Edmwnd Prys, Wmffre Dafydd ab Ifan, Wiliam Phylip, Sion Bryncir, Siôn Phylip, Richard Phylip, Sion Dafydd Lâs [John Davies], Watcyn Clywedog, Mor[u]s Dwyfech [Morus ap Dafydd ab Ifan ab Einion], Huw Lewis, Dafydd ap Hwlcyn ap Madog, Rhisiart Brych, Dafydd Jones ('Ficer Llanfair-Dyffryn-Clwyd'), Owen Gruffydd, Sion Lleyn [John Roberts], Taliesin, Rhys Goch Eryri, Dafydd Llwyd ap Llywelyn ap Gruffudd, Sion Roger, Sypyn Cyfeiliog [Dafydd Bach ap Madog Wladaidd], Bedo Brwynllys, Mathew Owen, Edward Morus, Huw Mor[y]s, Ieuan Dew Brydydd, Huw ab Ifan, Robert Davies (Nantglyn), Robin ab Iorwerth, Rolant Huw (Graienyn), Dewi Wyn [o Eifion] [David Owen], Griffith William (Braichtalog), Goronwy Owen, John Thomas (Pentrefeidiog) [i.e. Pentrefoelas], M[organ] D[avies], Griffith Puw, Dafydd Jones ('Tailiwr'), William ab Edward ('o'r Bennar'), Thomas Edwards ['Twm o'r Nant'], Lewis Morris, Ieuan Llwyd [Brydydd], Rhys Llwyd [Pant-y-piod], Rolant [Rowland] Jones (Pandy) [Roli Penllyn], Hugh Jones (Llangwm), John Jones [Jac] (Glan y Gors) and W[illiam] Jones [Bardd Môn]; 'englynion' by several authors; material relating to persons and places in Merioneth.