Notes on anthropology and Celtic archaeology.

Archaeological collectanea by Charles Roach Smith.

Three volumes of articles and notes on archaeology (including Roman remains), folklore, etc.

Notes on Celtic archaeology and antiquities.

A volume compiled by Henry Mathias, Haverfordwest, and containing press cuttings, articles dealing with archaeology, etc.

Autograph letters from a large number of people to Thomas and others, mainly relating to archaeology, Welsh history, literature and ecclesiastical affairs. The correspondents include B. Beedham, William Buckland, W. Boyd Dawkins, Walter Davies ('Gwallter Mechain'), J. P. Earwaker, D. Silvan Evans, R. W. Eyton, E. A. Freeman, Margaret Gatty, Reginald Heber, Felicia Hemans, H. Longueville Jones, John Keble, Sir Theodore Martin, Sydney (Lady) Morgan, Lord Mostyn, Samuel Rogers, W. F. Skene, Sir Arthur Sullivan, John Williams ('Ab Ithel'), Morris Williams ('Nicander') and Robert Williams (Rhydycroesau); an English poem entitled 'The Sixth Centenary of Dante's Beatrice 1890' by T. Tudno Jones; and a number of 'cut-out' autographs.

Miscellaneous papers, including letters to J. H. Davies from Evan William Edwards, Llandefeilog, [1922] (1) (thanking him for his correction regarding the date of P[eter] W[illiams]'s birth), W. J. Hemp, Ancient Monuments Board for Wales, 1922 and undated (2) (enclosing notes of the 19th, 20th and 21st meetings, circulars), P. Jones, Cynfal fawr, Festiniog [sic], 1902 (1) (Cynfal and Garth field names), Edward Owen, Royal Commission on Ancient Monuments, London, 1917 (1) (asking whether a certain tract among the BM MSS was printed), J. Owens, Chester, 1922 (1) (a committee to be held at Chester), Alfred Neobard Palmer, Wrexham, 1903 (1) (quoting lines of verse which Dr Spinther James sent him in which the names Cadi Rownd and Morgan Llwyd occur), Muriel Rees, Aberystwyth, 1922 (1) (thanking him for the testimonial), Thomas Richards, Maesteg, 1923 (2) (mention of 'Hanes Plwy' Bodedern', the sons of Morgan Llwyd, Dr Michael Roberts, etc.), David Thomas, Aberystwyth, 1922 (1) (the outline of a paper for the Cardiganshire Antiquarian Society), G. J. Williams, Bangor, 1921 (the names of Caleb Lloyd, 1660, has been found on the wall of the old building at Cynfal), and [Sir] John Williams, Aberystwyth, 1922 (2) (Friday will suit him just as well); a letter, 1903, to J. Jones [?'Myrddin Fardd'] from D. R. Jones, Cambria, Wis[consin] (thanking him for the notes on his 'cywydd', mention of sending a copy of Y Drych, he left Wales at the age of 13 in 1845); miscellaneous notes (fragments), some in the autograph of John Jones ('Myrddin Fardd'); part of an account of Cadwgan (draft); the title-page, introduction and pp. 483-490 of a (?) proof copy of The Life and Opinions of Robert Roberts, A Wondering Scholar, ed. J. H. Davies (the imprint is dated 1922 whereas the work was published in 1923); and 'Notes on Field Archaeology' (duplicated).

Reviews of Hugh Williams: Christianity in Early Britain; papers relating to Bala College; miscellaneous letters; press cuttings and illustrations relating mainly to archaeology; etc.

Two volumes of miscellaneous transcripts mainly in the hand of Walter Davies (Gwallter Mechain, 1761-1849), relating to the antiquities, history, topography, language, and literature of Wales. They include catalogues of Welsh manuscripts; transcripts of manuscripts of Evan Evans (Ieuan Brydydd Hir), of letters of Edward Lhuyd, Lewis Morris, Goronwy Owen, etc., of Strata Marcella abbey charters, of monumental inscriptions, of Evan Evans's transcripts of Richard Farrington's archaeological notes, etc.; notes on Llanerfyl, Llangadfan, and Garthbeibio, written by William Jones, Llangadfan, and sent by him, with letters, to Walter Davies; a letter, 1792, from Edward Williams (Iolo Morganwg) to Walter Davies; an extract, by Lewis Morris, from his Celtic Remains; Marwnad Lewis Morys ... by Goronwy Owen, in the autograph of Evan Evans; etc. Both volumes are indexed.

A notebook containing 'collectanea' of Thomas relating to the diocese of St Asaph, the Church and Nonconformity in Wales, archaeology, pedigrees, poetry, place names, autograph signatures, etc.

A notebook containing 'collectanea' of Thomas relating to the diocese of St Asaph, the Church and Nonconformity in Wales, archaeology, pedigrees, poetry, place names, autograph signatures, etc.

A notebook containing 'collectanea' of Thomas relating to the diocese of St Asaph, the Church and Nonconformity in Wales, archaeology, pedigrees, poetry, place names, autograph signatures, etc.

Four notebooks containing 'collectanea' of Thomas relating to the diocese of St Asaph, the Church and Nonconformity in Wales, archaeology, pedigrees, poetry, place names, autograph signatures, etc.

Four notebooks containing 'collectanea' of Thomas relating to the diocese of St Asaph, the Church and Nonconformity in Wales, archaeology, pedigrees, poetry, place names, autograph signatures, etc.

Notes on Old Testament History, the apocryphal scriptures, prehistory, and archaeology.

Sketches made by Charles Roach Smith of objects and sites of antiquarian and archaeological interest, mainly Roman, in Britain and France, 1843-1876.

A copy of the donor's dissertation 'The archaeology of 45 Swansea Road, Hirwaun', submitted for an MA degree in the Archaeology of Buildings at the University of York, 2001.

Archaeological and genealogical notes transcribed by Walter Davies from various manuscripts, and including Memoranda ... copied from Mr. [John] Lloyd of Caerwys's copy which he transcribed from loose scraps of paper which he found in the 3 vols. of Mr. [Edward] Lhuyd's Itinerary &c. which is at Hallstone.