An 'incomplete history' by the donor Nicholas C. Jenkins, 2007, into the history of Thomas Town Brickworks, Merthyr Tydfil. The first section of the work was published in the Merthyr historian, vol. 19 (2008), and the second section includes reproductions of Merthyr Brick and Tile Company Limited company records which are held by the National Archives, Kew.

Biographical and bibliographical notes and collectanea; four letters, 1872, from Evan M. Williams, Mineral Ridge, Ohio, an emigrant from Merthyr Tydfil, to his parents and brother in Wales; copies of two letters [1925] from Leah Hughes, Brooklyn, an emigrant from Bodfari; etc.

The file comprises papers relating the local opposition to the Ffos-y-Fran opencast mine in Merthyr Tydfil including a petition presented to the European Parliament..

Correspondence and research notes of Dr. A.W.L.Seaman relating to politics in Merthyr Tudful before 1914, comprising correspondence and papers relating to the biographies of three members of parliament for Merthyr Tudful (c. 1880-1914), namely William Pritchard-Morgan, Keir Hardie, and Edgar Jones (including letters from Edgar Jones, 1960-1961,) and newspaper cuttings and ephemera relating to the Merthyr Tydfil parliamentary election, January 1910.

Records relating mainly to the industrial concerns of the Crawshay family of Cyfarthfa, Merthyr Tydfil, Glamorgan, [1706]-1878, including leters and letter books of William Crawshay I and II and Robert Crawshay, 1806-1877; cash books, ledgers and bankers drafts, 1834-1888; deeds, [1706]-1885; wills, deeds and miscellaneous material, 1801-1838; balance sheets for ironworks, 1810-1867; will, valuation and probate for William Crawshay II, 1865-1869; shares and bills of exchange, 1870-1878; and Hilston Park estate papers, 1838-1862 and Caversham Park estate papers, 1826-1864. The archive represents the working papers of a major ironworking dynasty.

Correspondence and other papers broadly relating to various aspects of Taliesin's public life and work in Merthyr Tydfil and elsewhere. The file contains: some fifty-four draft and copy letters, or parts of letters, written by Taliesin Williams, including many letters to newspapers, 1831-1845, some twenty-seven letters and envelopes addressed to Taliesin and others, 1808-1843, and miscellaneous calling cards and addresses (T10/1); miscellaneous papers relating to his work as a schoolmaster in Neath and Merthyr Tydfil (T10/2); papers relating mostly to various aspects of public life in Merthyr Tydfil, including papers apparently relating to his service as special constable, various petitions to the Crown, the Marquess of Bute and others, and a few items relating to the Merthyr Tydfil Sympathetic Society, 1831-1839 (T10/3); and various papers relating to his activities with groups such as Cymreigyddion y Fenni and Cymreigyddion yr Alarch, being mainly lists of competition subjects, entries and adjudications by him (T10/4).
Of particular note is the beginning (2 pp.) of a draft, in Taliesin's hand, of a petition sent by the people of Merthyr Tydfil to Lord Melbourne, the Home Secretary, in July 1831 pleading for clemency for Lewis Lewis (Lewsyn yr Heliwr) and Richard Lewis (Dic Penderyn) (the final petition is apparently lost, see Gwyn A. Williams, The Merthyr Rising (Cardiff, 1988), p. 184) (in T10/3).