A record for the Tynwald Mine within the Great Laxey mining sett. The wider Great Laxey Mine, of which the sett's various named workings (including Tynwald Mine) formed part, was one of the richest lead, zinc and silver mines in the British Isles, opened by around 1782 and worked until final closure in 1929-1934. At its peak in the 1830s the mine employed over 200 men, and its ore included galena (lead sulphide) of exceptional quality - a 118 kg specimen from Laxey holds the world record for the largest sulphide crystal and is displayed at the Natural History Museum, London. The mine's famous waterwheel, the Lady Isabella (the Laxey Wheel), was built to pump water from the workings. No source consulted names Tynwald Mine specifically, so this general sett-wide history is offered as context rather than as a specific record of this individual working.