A small group of documents, 1636-1637, concerning the regulation of the manufacture and sale of copperas (ferrous sulphate), and silver mining in Cardiganshire.
They comprise: (i) a signed warrant of King Charles I to the Attorney General Sir John Bankes, received 17 July 1636, to conclude a contract between the king and English copperas makers to purchase copperas at an improved rate (f. 13); (ii) a petition to the king from Thomas Bushell, the mining entrepreneur, granted at Lindhurst, [Hampshire], 19 August 1637, asking to be granted the right to purchase copperas at a favourable price (f. 14); (iii) a further warrant from the king to Bankes, received 24 October 1637, mainly granting modifications to regulations relating to copperas to give Elizabeth, Dowager Viscountess Savage, a monopoly, but also requiring the removal of the provision for Bushell 'to have Copperis for our Mine in Wales at the former rate' (f. 15). Bushell intended to use copperas in a new process to extract silver from ore, however this process was to prove ineffective (see J. W. Gough, The Superlative Prodigall: A Life of Thomas Bushell (Bristol, 1932), p. 49). Bushell subsequently successfully petitioned the king to establish a branch of the royal mint at Aberystwyth to coin his silver, with himself as warden.

Papers, 1687, relating to the petition of Thomas East, engraver, for payment of amounts due to him for engraving large double judicial seals of silver for the Courts of Great Sessions for the counties of 'Carnarvan, Merionith, and Anglesey', 'Denbigh, Montgomery and fflint', and '[Carmarthen] Cardigan and Pembrook', 'a large double Silver Seale for the Chancellor of Denbigh and Montgomery', and 'a large steale Plate' for the embassy at Constantinople; a copy, with an English translation, of the charter of Edward II to the borough of Carmarthen, 1312; papers relating to the dioceses of Llandaff and St. Davids; etc.