A volume of heraldic and genealogical material in the hand of Edward Williams ('Iolo Morganwg'). P. xvii, which appears to be a 'title-page' to the section containing pp. 1- 84, is inscribed 'Achau ac Arfau Prif Fonedd y Cymry. Dadyscrif o Lyfr Du Pant Lliwydd Eiddo'r diweddar Mr. Thomas Truman, 1806' (see also the note on p. xix dated 7 October 1806 and addressed to the reader by [Edward Williams] 'Iolo Morganwg'). Pp. 1-61 contain a transcript of the genealogical and heraldic material to be found in pp. 73-204 of the aforementioned manuscript generally known as 'Llyfr Du Pantlliwydd' (now N.LW MS 13165), whilst pp. 62-84 contain a transcript of similar material to be found in pp. 13-72 of the same manuscript (i.e. N.L.W. MS. 13165B). Pp. 103-08 and 113-54 appear to contain a transcript of pp. 1-74 of the aforementioned 'Llyfr Du Pantlliwydd' with additions and / or variations. The remainder of the volume contains miscellaneous historical, genealogical, and heraldic material, etc., including sections with the following superscriptions or incipits - 'Llyma Bymthegllwyth Gwynedd' (pp. 155-7, ? extracted from NLW MS 13165B, pp. 142-5); 'Llyma son am natur a rhinweddau y meini gwerthfawr fal ai dangoswyd gan yr Ednywed ab Ednyw yn Llys Gruffudd ap Cynan . . . ac y fal ai dangoswyd gan y brawd leuan Goch ab Ithel hir gar bron y Brenin Edward yng Nghonwy' (pp. 161-4, allegedly 'O Lyfr Mr. Cob o Gaerdydd'); 'Llyma draethu am fonedd ag anfonedd . . .' (pp. 165-71, allegedly 'O Lyfr Thomas Hopkin o Langrallo'); 'Ach Bleddyn ap Cynfyn' (p. 180); '[Extracts] From a MS. Book of Genealogies, No. 51, W[elsh] Ch[arity] school' (i.e. British Museum Additional MS 14915) (pp. 181-6); 'Arfay swrn o Fonheddigion Cymru' (pp. 187-96; cf. NLW MS 13165B, pp. 74-82, 105, 168-9, 187-9, 202-04); 'Llyma Arfau y Pendefigion a ddifeddianwyd o'u Tiroedd a'u Da Gan Syr Robert ab Amon a'i Farchogion' (pp. 197-9); 'Gwehelyth y Matheuaid' (pp. 200-06); 'Ach Rhodri Mawr' (pp. 212-113); 'Llyma Wehelyth Syr Siôn Carn Farchog o Forganwg' (pp. 218-21); 'Llyma arfau y Cwncwerwyr a ddaethant ar Anrhaith i Forganwg' (p. 222); 'Ach Matho Herbert o Abertawe a Chogan Pyl' allegedly 'o Lyfr Thomas Hopkin o Langrallo' (pp. 229-30); 'Llyma enwau y pedwar brenin ar hugain o Frenhinoedd Ynys Prydain a farnwyd yn gadarnaf ag yn wrolaf i orchfygu a gorynnill ag i adeiliadu ag i roddi rhoddion ardderchawc . .' (pp. 255-65, cf. NLW MS. 13165B, pp.87-105); and 'Llyma enwau y Prif Ddinasoedd y rhai a wnaethant y Brutaniaid a Llyma eu henwau yn Gymraeg ac yn Saesonec' (pp. 267-8).

Grant of arms, 1793, to Richard Crawshay (1739-1810), Cyfarthfa, Merthyr Tudful, co. Glamorgan, by the College of Arms, London, with the grantee's arms emblazoned in the top left-hand corner.

Material collected by John Montgomery Traherne in connection with the preparation of his monograph on Sir Matthew Cradock. It includes pedigrees and notes, a transcript and English translation by Taliesin Williams ('Ab Iolo') of 'Dyma Ganu a wnaeth Rhys Brydydd i Syr Mathias Caradog am y Cwrdd Prydyddion a wnaeth efe yn y Merthyr Mawr', sketches, coats of arms, a letter, 1840, to Traherne from George Grant Francis, etc.

The author's copy, interleaved, with numerous manuscript and other additions, of Stradling Correspondence: A Series of Letters written in the Reign of Queen Elizabeth, with Notices of the Family of Stradling of St. Donat's Castle, Co. Glamorgan. Edited by the Rev. John Montgomery Traherne ... (London, 1840). Among the additions are notes and memoranda by John Montgomery Traherne, facsimiles of autographs, sketches of monuments and memorials, coats of arms, bookplates, autograph letters (including one from Agnes Strickland), etc., and a document, 1602, bearing the autographs of Thomas Mansell and W. Pryce.