The principal role of a stannary town was the collection of tin coinage, the proceeds of which were passed to the Duchy of Cornwall or the Crown. With the abolition of tin coinage in 1838, the principal purpose for coinage town status ceased. However, coinage towns still retained certain historic rights to appoint stannators to the Cornish Stannary Parliament.
Devon stannaries are usually referred to by the names of stannary towns. These towns were the locations where refined tin was assessed, coined, and sold. They were also the location for some of the institutions associated with the operation of the stannary. King Edward I's 1305 Stannary Charter established Tavistock, Ashburton and Chagford as Devon's stannary towns, with a monopoly on all tin mining in Devon, a right to representation in the Stannary Parliament and a right to the jurisdiction of the Stannary Courts. Plympton became the fourth Devon stannary town in 1328 after a powerful lobby persuaded the Sheriff of Devon that it was nearer the sea and therefore had better access for merchants. The Devon stannary towns are all on the fringes of Dartmoor, which is the granite upland which bore the tin. No definition of the boundaries of the Devon stannaries is known, if indeed one ever existed.
Cornish stannaries
The four Cornish stannaries were :
Penwith and Kerrier: Most of the hundreds of Penwith and Kerrier
The geographical jurisdiction of each Cornish stannary was more clearly demarcated that of the others than was the case in Devon, as each represented a separate tin-bearing area, but the boundaries were not precisely laid down. The relative productivity of the stannaries varied greatly and was in no way related to their size. The towns at which coinage was carried out in Cornwall varied over time. The Cornish coinage towns included at various times: Penzance, Truro, Helston, St Austell, Bodmin, Liskeard and Lostwithiel. Penryn twice attempted to acquire coinage town status, supported by Falmouth, but failed on both occasions due to strong opposition from the established coinage towns.
Surviving records
Survival of stannary records has been rather patchy. The Cornwall Record Office has records from the Vicewarden's Court of the Stannaries of Devon and Cornwall, mostly from the mid nineteenth century onwards, which is rather late in the overall history of the stannary organisations. Earlier survivals in the CRO include the Tin Abstract Books from the Truro Tin office for 1703–10 and 1833–35. These books record the quantities of tin coined in the various coinage towns of Devon and Cornwall, the purchase of tin by the crown and the shipment of this tin by sea to London. Many stannary-related papers including registration of tin bounds, records of tin production and papers relating to disputes are to be found in the records of families with tin mining interests, although these are frequently intermingled with records on other matters so location of specific information is difficult. The National Archives hold most of the records of central government, which includes records on stannary matters including manorial rolls for part of the reign of Charles 1. The House of Lords Record Office also contains relevant material, primarily relating to the special position of the stannary organisations with respect to the law.
