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National Library of Wales
Merthyr of Senghenydd, Lord, collection

Reference code(s): GB 0210 MERTHYR

Held at: National Library of Wales

Title: Lord Merthyr of Senghenydd Collection

Short Title: Merthyr of Senghenydd, Lord, collection

Creation date(s): 1584-1921

Level of description: Fonds

Extent: 0.295 cubic metres (11 boxes)

Name of creator(s): Lord Merthyr


Administrative/Biographical history: Sir William Thomas Lewis (1837-1914), 1st Baron Merthyr of Senghenydd, was the son of Thomas William Lewis, an engineer at the Plymouth iron-works, Merthyr Tydfil. In 1855, he became assistant-engineer in the service of the Bute estate, mineral agent of the estate in 1864 and in 1880 acting trustee to the Bute estate. Sir William managed the Bute pits, but between 1870 and 1880 also acquired control of his own pits, later known as Lewis Merthyr Consolidated Collieries Limited in the lower Rhondda. He also sank a pit at Senghenydd in 1895. In response to the growing strength of trade unionism, he set up what developed into the South Wales and Monmouthshire Coalowners' Association. Sir William's eldest son and heir was Herbert Clark Lewis (1866-1932), 2nd Baron Merthyr of Hean Castle, Pembrokeshire.


Scope and content/abstract: Deeds relating to the Baskerville family and Baskerville Rickards Mynors family of Aberedw, Radnorshire, 1673-1867, and deeds, 1584-1922, relating to premises [?which were later acquired by Lord Merthyr or which he had an interest in] relating to the coal industry, mainly in Glamorgan and Breconshire, with some relating to the iron industry, railways and docks in Glamorgan, all mainly 19th cent., together with letters and legal papers.


Language/scripts of material: English

System of arrangement: Arranged by date of acquisition and then chronologically

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: A hard copy of the catalogues is available at NLW. An online catalogue can be accessed from


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

Accruals: Accruals are not expected

Archival history:

Immediate source of acquisition: Donated in February 1934 followed by a deposit in 1947 by Lord Merthyr of Senghennydd, Hean Castle, Pembrokeshire.


Related material: Further papers relating to the Pembrokeshire holdings of Lords Merthyr of Senghenydd are Pembrokeshire Record Office: D/MER. Further papers of Lord Merthyr are National Library of Wales, Lord Merthyr of Senghenydd Scrapbooks.


Note: Title supplied from contents of fonds

Archivist's note: Compiled by Mair James.
The following source was used in the compilation of this description: The Dictionary of Welsh biography down to 1940 (London, 1959).

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

Date(s) of descriptions: October 2002

Baskerville Rickards Mynors family, | of Aberedw and Evancoyd | Archives
Baskerville family, | of Aberedw | Archives
Coal mines and mining | Wales | Breconshire
Coal mines and mining | Wales | Glamorgan
Docks | Wales | Glamorgan
Iron mines and mining | Wales | Glamorgan
Railways | Wales | Glamorgan

Personal names
Baskerville Rickards Mynors family , of Aberedw and Evancoyd
Baskerville family , of Aberedw
Merthyr of Senghenydd , William Thomas Lewis , 1837-1914 , Baron

Corporate names


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