Industrial records, 1720-1875, of the Maybery family and of the clients of Powell and Jones, solicitors, mainly relating to the iron industry in Brecknockshire and Glamorgan, but including also papers relating to the Brecon and Abergavenny Canal, 1792-1860, the Brecon Boat Co., 1818-1855, and the Brecon Turnpike Trust, 1828-1840; clients deeds, correspondence, etc., mainly 18th-20th century, including manor records, 1520-1844, mainly in Breconshire, family letters, newspaper cuttings, photographs, deeds and documents relating to the Maybery family and their relatives, the Cobbs and the de Wintons, 19th-20th century, office records of Messrs W. and J. Powell and their successors, 1790-1865, and papers of John Lloyd (1833-1915), historian of the South Wales iron industry.