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National Library of Wales
Plas-yn-Cefn estate, records

Reference code(s): GB 0210 PLASYNCEFN

Held at: National Library of Wales

Title: Plas-yn-Cefn Estate Records

Short Title: Plas-yn-Cefn estate, records

Creation date(s): 1336-1892

Level of description: Fonds

Extent: 0.715 cubic metres (25 boxes, 21 vols)

Name of creator(s): Plas-yn-Cefn estate


Administrative/Biographical history: Cefn is in the civil parish of the same name, which was formed in 1865 from that part of the parish of St Asaph that lay in Denbighshire. The mansion of Cefn is called occasionally Cefn in Wigfair in early 18th century deeds, and occasionally Cefn Meiriadog in 1790s-1820s deeds, after the townships of Wigfair and Meiriadog between which it lay. The mansion was called Cefn until at least 1883, and the estate was called the Cefn estate until at least 1892, but the mansion is now called Plas-yn-Cefn.

The Plas-yn-Cefn estate was owned by the Lloyd family until it failed in the male line with the death in c. 1848 of Edward Lloyd. The estate was inherited by his eldest daughter Anna, who married Herbert Watkin Williams-Wynn (1822-1862), second son of Sir Watkin Williams-Wynn of Wynnstay (1772-1840), in about July 1855. The Plas-yn-Cefn estate became part of the Wynnstay estate which in 1873 measured 87,919 acres in Wales, with an estimated rental of £43,274.


Scope and content/abstract: Records of the Lloyd family of Cefn, Denbighshire, and of their estates in Caernarfonshire, Denbighshire and Flintshire, 1336-1892. The catalogued portion of the archive comprises mainly deeds, 1422-1892, including deeds relating to lead mines in Flintshire and Denbighshire, coal mines in Flintshire and copper mines in Caernarfonshire, 18-19 cent.; correspondence, 1688-1882; and volumes containing financial, personal and legal information, 1710-1770. The deeds and the correspondence sections include papers relating to ecclesiastical affairs, 1562-1864; and important papers of Humphrey Humphreys (1648-1712), cleric and antiquarian, and bishop of Bangor from 1689 to 1701, and of Hereford from 1701 to 1712, relating to his period as bishop of Hereford. The uncatalogued portion of the archive consists of similar material, dated 1336-1845.


Language/scripts of material: English, Latin

System of arrangement: Arranged chronologically in three sections: deeds, 1422-1892, correspondence, 1688-1882, and volumes, 1710-1770.

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 catalogue of the 1938 deposit are available at NLW and HMC. The 1970 and 1971 deposits remain uncatalogued. The catalogue can be accessed online from


Appraisal, destruction and scheduling information: All records deposited at NLW have been retained.

Accruals: Accruals are not expected.

Archival history:

Immediate source of acquisition: Deposited by Sir Robert W. H. Watkin Williams-Wynn, ninth baronet, in December 1938, and by Colonel Sir Owen Watkin Williams-Wynn, baronet, in 1970 and 1971.


Related material: Further papers relating to Bishop Humphrey Humphreys are correspondence and papers, 1691-1709, in National Library of Wales, Boderwyd Papers; letters from him to to Edward Wynn in Penrhyn Castle Papers, and correspondence with Thomas Mostyn, 1683-1692, in (Bangor) Mostyn Collection, both in the Department of Manuscripts, University of Wales Bangor Library, and letters to Bishop William Lloyd, Gloucestershire Record Office, D49 and D3549.

Publication note: Griffiths, G. Milwyn, 'Deposited collections, 33, The Plas yn Cefn Collection', National Library of Wales Journal, XII (1961-1962), pp. 292-7.


Note: Title supplied from contents of fonds.

Archivist's note: Compiled by Stephen Benham.
The following source was used in the compilation of this description: Griffiths, G. Milwyn, 'Deposited collections, 33, The Plas yn Cefn Collection', National Library of Wales Journal, XII (1961-1962).

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

Date(s) of descriptions: November 2001

Coal mines and mining | Wales | Flintshire
Copper mines and mining | Wales | Caernarvonshire
Estate administration | Wales | Caernarvonshire
Estate administration | Wales | Denbighshire
Estate administration | Wales | Flintshire
Lead mines and mining | Wales | Denbighshire
Lead mines and mining | Wales | Flintshire
Lloyd family, | of Cefn | Archives
Plas-yn-Cefn Estate (Wales) | Archives

Personal names
Humphreys , Humphrey , 1648-1712
Lloyd family , of Cefn
Williams Wynn family , of Wynnstay

Corporate names
Church of England | Diocese of Hereford
Plas-yn-Cefn Estate (Wales)


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