History
Cornwall and Devon provided most of the United Kingdom's tin, copper and arsenic until the 20th century. Originally the tin was found as alluvial deposits in the gravels of stream beds, but eventually underground working took place. Tin lodes outcropped on the cliffs and underground mines sprang up as early as the 16th century.
Read more about this topic: Mining In Cornwall
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—Ralph Waldo Emerson (1803–1882)
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—Ralph Waldo Emerson (1803–1882)