Mackworth Papers

Archive Collection

Scope and Content

Family letters, estate and business papers of Sir Humphrey Mackworth (1657-1727)of Neath, of his son Herbert Mackworth (1687-1765) and grandson Sir Herbert Mackworth (1736/7-1791) together with a smaller number of family letters and title deeds relating to family properties in the Neath area 1608-1849.

Administrative / Biographical History

The material in this archive relates primarily to the personal and business affairs of three members of the Mackworth family: Sir Humphrey Mackworth (1657-1727), Herbert Mackworth (1687-1765) and Sir Herbert Mackworth (1736/7-1791). There is also a smaller amount of papers relating to later generations of the Mackworth family.

Sir Humphrey Mackworth (1657-1727), the son of Thomas and Anne Mackworth of Betton Grange, Shropshire, was an industrialist and a lawyer. He was knighted in 1682/3 by King Charles II. In 1686 Sir Humphrey married Mary the daughter of Sir Herbert Evans of Gnoll, Neath, Glamorgan and from this date he settled in Neath [Castell-nedd]. Mary was the sole heiress of her father's extensive Glamorgan and Monmouthshire estates and so through her Sir Humphrey came into possession of these estates. Leases concerning the working of coal in the Neath area previously held by Mary's father and grandfather were renewed for Sir Humphrey Mackworth. He went on to significantly develop coal-mining on his wife's estates and also began copper smelting at Neath in the late seventeenth century. In 1698 Sir Humphrey acquired large interests in Cardiganshire which included the rich mineral deposits of the Gogerddan estates. He formed the Company of Mine Adventurers to develop these deposits. In 1713 he formed the Company of Mineral Manufacturers, although this ceased its operations in 1719. Sir Humphrey Mackworth was MP for Cardiganshire in 1701, 1702-1705 and 1710-1713. He died in 1727.

Sir Humphrey Mackworth was succeeded to his estates by his son Herbert Mackworth (1687-1765). He was MP for Cardiff 1739-1765. His son Sir Herbert Mackworth (1736/7-1791) also represented Cardiff 1765-1790 and was created a baronet in 1776.

Conditions Governing Access

Please refer to repository.

Conditions Governing Use

Please refer to repository.

Custodial History

This collection forms part of the Royal Institution of South Wales Collection and was transferred from the Archives at University of Wales Swansea to West Glamorgan Archive Service in April 2004.

Geographical Names