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All Slade Mine (Bishopston Mine), Bishopston, Swansea, Wales, UK

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Other/historical region names associated with this locality: West Glamorgan; Glamorgan
 
A small lead mine, probably of some antiquity, although the first recorded working is from the latter 18th century, when All Slade Mine is said to have made a profit of £12,000.

Active again for three years from about 1810, the mine is mentioned in "A Topographical Dictionary of The Dominion of Wales by Nicholas Carlisle, London, 1811", which notes:- "BISHOPSTON, There is a Lead mine in a Valley in this Parish, called All Slade, about a quarter of a mile from the Sea-shore. This Mine was re-opened about two years ago, and some Tons of Ore of a good quality were raised from it, but it was again dropped, either for want of Capital or Spirit in the Adventurers. Several Implements of the ancient Miners were discovered upon reopening it, which occasioned an idea that they perished in the Mine, but no remains of them were found."

The mine was finally reopened as the Bishopston Silver-Lead Mine from 1850-53, and although shallow, with workings only reaching 14 fathoms below deep adit, reports in the Mining Journal state that the pump was never able to adequately cope with the influx of water.

The only recorded output was 10 tons of lead ore in 1853.

Ref.: Northern Mines Research Society, British Mining No. 18, The Non-Ferrous Mines Of The South Wales Area, J R Foster-Smith, 1981

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