Mae'r fonds yn cynnwys dwy gyfrol, 1937-1961, yn cofnodi'r niferoedd a oedd yn bresennol yn nosbarthiadau'r Ysgol Sul, Capel Hermon, Llanfachreth, manylion am eu gweithgareddau yno a chyfanswm y casgliadau; nifer o 'lyfrau'r athro' a gedwid gan athrawon yr Ysgol Sul, 1959-1968, yn rhestri enwau'r plant o fewn y dosbarthiadau unigol a manylion am eu presenoldeb; ynghyd â llyfr cyfrifon, 1912-1927, yn cofnodi cyfraniadau'r aelodau at wahanol gasgliadau a chyfres o holiaduron, 1916-1929, yn rhoi manylion am y capel a'r aelodau.
Records of the Rhondda Conservative and Unionist Association, 1971-1986, including minutes of Executive Council meetings, 1973-1986; minutes of the Mid-Rhondda Branch, 1971-1976; minutes of Joint Branch meetings, 1976-1986; and photocopies of the Rhondda Conservative and Unionist Association Newsletter, 1976-1986.
Deeds and documents, 1774-1933, relating mainly to farms called Penrhyn Mawr and Penrhyn Fach, and in particular to a parcel of Penrhyn Fach called Park y Quay on which Penrhyn Castle was built in the parish of St Dogmaels, co Pembroke, with also related maps, correspondence, and sales catalogues.
Deeds, documents and business papers, 1843-1955, of the Evans family of Neuaddfawr and Rhydyronen, p. Llanfihangel Genau'r Glyn, Cardiganshire, together with poor rate books for the township of Trefeurig in the parish of Llanbadarn Fawr, [1850s]-[1860s] and an account book of Seion Independent Chapel in the township of Ceulan-a-Maesmor, 1857-1872.
Evans family, of Neuaddfawr and Rhydyronen, Llanfihangel Genau'r Glyn
The fonds comprises research material relating to drovers and drove roads in Wales, and in other parts of Britain and Ireland, reflecting R. G. Avent's interest in the subject. The papers include manuscript notes, notebooks and offprints from journals and magazines, together with some related publications. Also included is a card index containing references to relevant printed sources, some of which are cross-referenced with the notes.
Research papers of Professor T. V. Davies, 1981-[c. 1991], into the farms and farmers of Senghenydd Supra in the parishes of Gelligaer and Merthyr Tydfil including photocopies of documents in the Public Record Office, National Library of Wales, Glamorgan County Record Office, and Gwent County Record Office; miscellaneous research notes and transcripts; draft chapters; papers relating to the Llantrisant and District Local History Society, 1981-1990; letters to T. V. Davies, [c.1984]-1990; and typescripts of his lectures to history societies, 1988-1989.
Deeds, plans, wills, marriage settlements and other papers, 1709-1940, relating to the Ffrwdgrech estate, Llanfaes, Brecknockshire, and to lands in neighbouring parishes.
A volume of holograph sermons by Robert Jones, Baptist minister, Llanllyfni, co. Caernarvon. One of the sermons is dated at his home at Ochr y Foel, 29 January 1883. Also included in the volume are two hymns and a catechism. At the beginning is a list of contents ('Cynnwysiad').
A volume of transcripts of leases, grants, charters, etc., 1704-1755, relating to the issues and profits of the origianl seal for cos. Caernarvon, Anglesey, and Merioneth, and of sums of money payable for fines and recoveries levied in the said counties, compiled for reference by William Wynne, serjeant at law, who was granted a lease of the original seal in 1729. The volume is indexed.
A bound attested copy of the apportionment of rent charge payable in lieu of tithes in the parish of Gwnnws, co. Cardigan, as confirmed by the Tithe Commissioners in 1847, prefaced by a copy of the award made prior to the apportionment and confirmed by the Commissioners in 1844.
A register of the monthly rainfall at Pantmawr, parish of Llangurig, co. Montgomery, December 1899-July 1905, taken by David John Lewis, Glansevern Arms Hotel; together with an annotation, 1931, by 'E. A. L.', i.e., Professor E. A. Lewis, University College of Wales, Aberystwyth.
Papers relating mainly to the passing of a Bill to authorise the Golden Valley Railway Company to extend its railway to Hay, 1875-1883, including legal papers, 1875-1877; financial papers, 1876-1883; and miscellaneous papers, 1876-1883.
Papers relating to Cymdeithas Gwrandawyr Cymru, 1955-1976, Cymdeithas Telynau Cymru (The Welsh Harp Society), 1962-1979, papers relating to Rio Tinto Finance and Exploration Limited, 1969-1973 and the Chrome Company Ltd, 1970, miscellaneous papers, 1942-1970; papers relating to the Welsh Folk-Song Society, 1956-1985; and to his research and music interests, [1900]-[1995].