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National Library of Wales
Aberpergwm estate, records

Reference code(s): GB 0210 ABEPERGWM

Held at: National Library of Wales

Title: Aberpergwm Estate Records

Short Title: Aberpergwm estate, records

Creation date(s): 1605-1910

Level of description: Fonds

Extent: 0.694 cubic metres(13 boxes, 58 volumes)

Name of creator(s): Aberpergwm estate


Administrative/Biographical history: The Williams family of Aberpergwm was an old family with a very long association with the upper Neath Valley. The family pedigree can be traced back to one Morgan ap Caradoc ap Iestyn, the 12th century lord of Nedd-Afan. The family made Aberpergwm their home in the 16th century, and continued there until the 1950s. The estate consisted in the main of a large area in the parish of Cadoxton-juxta-Neath, principally in the hamlets of Neath Higher and Neath Middle, in the manor of Neath Ultra and Cilybebyll, and adjacent areas in Breconshire. Several members of the family were instrumental in cultivating Welsh poetry and music in the Neath Valley, and the house once contained many important Welsh manuscripts.
The Williams family were deeply involved in the coal industry, encouraging the growth of the industry to such an extent that Morgan Stuart Williams is described in 1889 as colliery owner in preference to the usual esquire.
William Williams (1788-1855) married Matilda Susannah Smith, only daughter and sole heiress of Col. Thomas Smith of Castellau, Glamorgan, and Rosamund, daughter of John Bush of Buscot, Oxfordshire. Matilda Susannah married secondly, Edward Lloyd of Ty'n-y-Rhyl, Flintshire, which may explain the presence of papers of the Lloyd family of Castellau and Aberpergwm.
According to the 1873 return of owners of land, Morgan Stuart Williams (1846-1909) of Aberpergwm, Glamorgan, owned an estimated 3,917 acres in Wales (in Glamorgan and Breconshire), with an estimated rental of £3,690. He purchased the St Donat's Castle estate in 1899. His eldest son and heir, Godfrey Herbert Joseph Williams sold St Donat's Castle in 1922.


Scope and content/abstract: Deeds of the Aberpergwm estate in Glamorgan, Monmouthshire, Breconshire, and Carmarthenshire, 1605-1908, including papers, mainly 18th century, relating to the claims of inhabitants in the Forest of Dean; rentals and general account books of the estate, including account books and balance sheets of the Aberpergwm colleries, 1759-1910; documents relating to Treferig Valley railway, 1874-1884; personal papers, including letters to the Williams family of Aberpergwm and the associated families of Smith of Castellau, Llantrisant, Lloyd of Castellau and Aberpergwm and the Bush family of Durcot, Oxfordshire, 1762-1901; Castellau estate papers, 1863-1878; miscellaneous papers, 1671-1884; printed material, 1811-1895; and diaries, 1760-1863.


Language/scripts of material: English , Latin

System of arrangement: Arranged by date of deposits and into letters and manuscripts arranged chronologically by record type (the 1940 deposit); deeds and documents arranged chronologically (the 1965 deposit); and arranged chronologically by record type (the 1991 deposit).

Conditions governing access: Readers consulting modern papers in the National Library of Wales are required to sign the 'Modern papers - data protection' form.

Conditions governing reproduction: Usual copyright laws apply

Finding aids: Hard copies of the catalouges, entitled Aberpergwm Deeds and Documents, Aberpergwm Letters and Manuscripts, and Aberpergwm Papers are available at NLW and HMC. The BRA donation remains uncatalogued. An online catalogue can be accessed from


Appraisal, destruction and scheduling information: All records deposited and donated to NLW have been retained

Accruals: Accruals are not expected

Archival history:

Immediate source of acquisition: Deposited by Mr Godfrey Williams, Aberpergwm, per Mr R. Bernard Bowran in 1939; the Trustees of the Aberpergwm Estate in 1949; Major Idris M. Williams, per Messrs Ashurst, Crisp & Co., London, between December 1964 and March 1965, and in July 1965; Major Idris Morgan-Williams, St Helier, Jersey, in 1991;,and donated by Messrs Pennington Lewis & Lewis, London, per The British Records Association in 1979.


Related material: A group of 19-20th century papers relating to the Aberpergwm estate is West Glamorgan Archive Service, D/D Ab. Papers relating to the estate may in the National Library of Wales are NLW MSS 22348-50 and NLW BRA parcel 1787 (uncatalogued). Further records relating to the family's other Glamorgan estates, Castellau and St. Donat's, are in Glamorgan Record Office. Portraits and topographical prints are in National Library of Wales, Special Collections.


Archivist's note: Compiled by Mair James.
The following sources were used in the compilation of this description: West Glamorgan Archive Service, Catalogue of the Aberpergwm Estate Papers, James, Brian, 'The Great Landowners of Wales in 1873', National Library of Wales Journal , XIV, (1965-66); Collis, Kim, The West Glamorgan Archive Service: A Guide to the Collections , (West Glamorgan Archive Service, 1998); Burke's Landed Gentry , (London, 1952).

Rules or conventions: This description follows NLW guidelines based on ISAD(G) Second Edition; AACR2; and LCSH.

Date(s) of descriptions: May 2002

Coal mines and mining | Wales | Glamorgan
Estate administration | Wales | Glamorgan
Llanbedr Estate (Wales) | Archives
Lloyd family, | of Castellau and Aberpergwm House | Archives
Smith family, | of Castellau | Archives
Williams family, | of Aberpergwm House | Archives

Personal names
Bush family , of Durcot
Lloyd family , of Castellau and Aberpergwm House
Smith family , of Castellau
Williams family , of Aberpergwm House

Corporate names
Aberpergwm Colliery (Wales)
Aberpergwm Estate (Wales)
Castellau Estate (Wales)
St Donat's Castle Estate (Wales)
Treferig Valley Railway

Dean, Forest of (England : Forest)

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