Letters, copies of agreements and other papers, [1771-c. 1841], with later memoranda, mainly relating to ironworks in south-east Wales. They include letters from J. Parry de Winton to Lewis William (Neath), and from Jeremiah Homfray, Samuel Homfray, John Jones (Velindre), Edward Kendall, Watkin Powell (Brecon), P. Sittitoes, and William Taitt.

Papers of John Bedford, 1762-1791, largely relating to his time in South Wales, and deal with iron-making techniques, his interests in experimenting with and improving these techniques, and the state of his own business ventures in forging and quarrying. The papers include notes on iron-making techniques, 1763-1788; management and business papers, 1766-1791; correspondence, petitions and miscellaneous notes, 1766-1789; and quarry notes, 1762-1789.