An armorial drawn and compiled by Thomas, mainly of North Wales families.

A volume containing a glossary of armorial families and individuals; a few pedigrees, notably of Griffith of Carreg-lwyd, Llanfaethlu; a list of the fifteen tribes of North Wales; and a note and diagram to ascertain the acreage of the island of Anglesey.

'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.

A volume, [16 cent., second ½], probably in the hand of Thomas Powell (d. 1588), Parc y Drewen, Whittington, co. Salop, containing a much shortened text of Humphrey Lhuyd's English version of Brut y Tywysogion, upon which version David Powel based his Historie of Cambria, now called Wales ... (London, 1584) (see Brut y Tywysogion ..., ed. by Thomas Jones (Cardiff, 1952), pp. xiv-xviii). Omissions mainly involve passages relating to events outside Wales, church affairs and the papacy, anecdotes, explanations of Welsh personal and place-names, and the arguments against Polydore Vergil. Three other copies are known: BL, MS Cotton Caligula A VI; Oxford, Bodleian Library, Ashmolean Museum MS 847; and NLW, Llanstephan MS 177. Also included are a pedigree of the kings and princes of North Wales from Cadwaladr to Llywelyn ap Gruffudd (ff. iv-v verso), a painted coat of arms of Cadwaladr (f. 1), and an index of personal and place-names (ff. 168-70 verso). Six lines of English verse are added in a contemporary hand on f. 171 verso.