Fonds GB 0210 PLASPOWER - Plas Power Estate Records and Papers

Identity area

Reference code



Plas Power Estate Records and Papers


  • [c.1300], 1414-[?c.1960] (Creation)

Level of description


Extent and medium

0.7729 cubic metres (18 boxes; 27 small boxes; 140 volumes).

Context area

Name of creator

Administrative history

The Plas Power estate was established in the early seventeenth century, and eventually comprised lands in Denbighshire, Merionethshire, Flintshire, Cheshire, Montgomeryshire, Shropshire and Lancashire. Its focal point was the area around Wrexham, especially the townships of Bersham, Esclusham and Minera, where there were thriving collieries, quarries and mineral works. Ownership of the estate passed through the hands of several families, none of them holding on to it for more than a few generations. The nucleus of the estate appears to have been established by Sir Henry Power, an Irish landowner who was at Bersham in 1620, but by the end of the century his grandson, John Power, had moved to Dover, and the lands in Bersham were sold to William Fownes of Dublin. In 1733, the Plas Power estate was sold to Mary Myddelton, daughter of Sir Richard Myddelton of Chirk Castle. Plas Power was thereby added to the estates that Mary Myddelton had already inherited from her mother, Frances Whitmore, which she held separately from the Chirk estate. The Plas Power estate now included Bersham, Minera, Broughton, Brymbo and Esclusham (all in Denbighshire) and Bodfari (Flintshire), many of which were rich in mineral deposits. From 1720, the sitting tenant at Plas Power was Rev. Thomas Lloyd, whose mother was Elizabeth Myddelton of the Plas Cadwgan branch of the Chirk family; he had been tutor at Chirk under Richard Myddelton, served Mary Myddelton as chaplain, and also acted on behalf of both of them in estate matters throughout his life. Mary Myddelton never lived at Plas Power herself, preferring to stay at Croes Newydd, near Wrexham, where she moved in 1719. On Thomas Lloyd's death in 1734, therefore, his son, William, succeeded him as the sitting tenant at Plas Power, and on Mary Myddelton's death in 1747 she bequeathed Plas Power to him, also making him a trustee of the Chirk estate; links between Plas Power and Chirk remained close for many years, resulting in the presence of many Chirk papers from all periods in this archive. William Lloyd's second son, also named William, succeeded him at Plas Power, and on his death without issue in 1816 the estate passed to his nephew, Thomas FitzHugh, son of Thomas FitzHugh of Portland Place, Marylebone, London, and Mary, the sister of William Lloyd (junior). Plas Power remained in the possession of the FitzHugh family, who also held lands in Middlesex and Essex, until the twentieth century, and eventually passed to Thomas’s great-grandson, Lieutenant Colonel G. E. FitzHugh.

Archival history

The archive was kept at Plas Power until the bulk of it was transferred in 1970 to NLW, which had already bought a number of literary manuscripts from the house. This initial deposit was purchased by the Library in 1974, and smaller deposits were made subsequently.

Immediate source of acquisition or transfer

Lieutenant Colonel Godfrey Edmund FitzHugh, O.B.E., T.D.; Plas Power, Wrexham, Denbighshire; Purchase; 1974

Bersham Industrial Heritage Centre; Wrexham; Donations; 1987, June 1991; A1987/105, A1991/90.

Sotheby's auctioneers; London; Purchase; November 1985; B1985/43.

Phillips auctioneers; London; Purchases; March and October 1989, March 1990; B1989/7, B1989/43, B1990/12.

Mr E. F. Lloyd FitzHugh, O.B.E., D.L., J.P.; Plas Power, Wrexham; Purchase; November 2001; B2001/20.

Content and structure area

Scope and content

Estate, financial, legal, personal, domestic, industrial and commercial papers of the several families who held the Plas Power estate, notably the Myddeltons, Lloyds and FitzHughs, including some papers relating to the Myddelton family of Chirk and their estates.

Appraisal, destruction and scheduling


Accruals are not expected.

System of arrangement

Arranged at NLW into four groups: estate records; letters; family papers; and public administration. Because of the close relationship between the various branches of the Myddelton and Lloyd families and their households during the lifetime of Mary Myddelton, whose household at Croes Newydd included a number of individuals closely associated with Chirk, it has not always been possible to disentangle the provenance of some documents with absolute certainty. Furthermore, because of the variety of ways in which the documents were created and accumulated, it has not proved practical to create a separate group of Chirk Castle papers; care has been taken, however, to identify such documents where appropriate. Further details are given at the appropriate levels of description. Often, an attempt has been made to list files in chronological order, but occasionally anomalies arise where a file contains material that overlaps chronologically with neighbouring files; in such cases, the file is placed in the position that best represents the bulk of its contents.

Conditions of access and use area

Conditions governing access

Readers consulting modern papers in the National Library of Wales are required to abide by the conditions set out in information provided when applying for their Readers’ Tickets, whereby the reader shall become responsible for compliance with the Data Protection Act 1998 in relation to any processing by them of personal data obtained from modern records held at the Library.

Conditions governing reproduction

Usual copyright laws apply.

Language of material

  • English
  • French
  • Greek
  • Latin
  • Welsh

Script of material

Language and script notes

English, Latin, French, Welsh and Greek (see appropriate level descriptions).

Physical characteristics and technical requirements

Finding aids

Allied materials area

Existence and location of originals

Existence and location of copies

Related units of description

Further estate records, legal records, family papers, and business and industrial papers relating to the Plas Power and Chirk Castle estates and their proprietors are NLW Deeds 1439-44, NLW MS 22097E and Denbighshire Record Office, Plas Power MSS, and the bulk of records relating to the Chirk Castle estate are NLW, Chirk Castle Estate Records; additional material of a similar nature may be found in NLW, Henry Robertson Papers, Harrison and Sons Papers, Benjamin Piercy Papers, Benjamin Piercy Maps, Smallwood Collection of Deeds and Papers, Ruthin Lordship Records, Bathafarn and Llanbedr Estate Records, Coed Coch and Trovarth Estates Records, Davies and Charles (Brymbo) Family Papers, John Garnons (Solicitor) Collection of Deeds, Robert Rawley Collection of Deeds, Fronheulog Estate Records, and Caerynwch Estate Records. Literary manuscripts from the library at Plas Power are NLW MSS 716-36 and NLW Minor Deposits 1389-90, and NLW also holds a considerable number of printed volumes and photographs that were formerly at Plas Power.

Related descriptions

Notes area


Title supplied from contents.

Alternative identifier(s)

Virtua system control number


Access points

Subject access points

Place access points

Genre access points

Description control area

Description identifier

Institution identifier

Llyfrgell Genedlaethol Cymru = The National Library of Wales

Rules and/or conventions used

This description follows NLW guidelines based on ISAD(G) 2nd ed.; AACR2; and LCSH


Level of detail

Dates of creation revision deletion

August 2013.


  • English



The following sources were used in the compilation of this description: Dictionary of Welsh Biography down to 1940 (London 1959); Thomas Nicholas, Annals and Antiquities of the Counties and County Families of Wales (2 vols, London : 1872) i; D. Leslie Davies and Robert Davies, The Myddelton-Lloyd papers of Plas Power (Transactions of the Denbighshire Historical Society xx 1971) 256-60; D. Leslie Davies, Miss Myddelton of Croesnewydd and the Plas Power papers (Transactions of the Denbighshire Historical Society xxii 1973) 121-65; Report on the family and estate papers of the FitzHugh family of Plas Power (Clwyd Record Office : 1983); Burke’s Landed Gentry (London, 1952); documents within the archive.

Archivist's note

Description compiled by David Moore.

Accession area