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The ancient opencast mine of Twll y mwyn [transl.: mine pit or hole] was re-discovered and excavated by miners working for the Crown Mineral Agent and
antiquary Lewis Morris in 1742. His thoughtful observations on the antiquity of mining here provides us with the earliest description of the discovery of stone tools, fire-setting and primitive mining in Britain (Bick & Davies 1991).
The mine lies at the north end of the powerful Darren Lode, and during the 19thC this part of the vein was re-worked for copper and silver-lead
ores (the Copper Level).
The site is to be properly surveyed by the EMRG and the tips sampled for mineral and dating purposes in June 2005.
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