The subterranean spirits are those who dwell in caverns and other recesses of the earth, where they kill or suffocate or render insane miners in search of precious metals. The Germans call them Kobolds. They are gnomes, dwarfs not over an ell in height, and they help in cutting stones, getting out metals, packing them in baskets and hauling to the surface. They laugh and whistle and perform a thousand tricks, but their services often redound to the injury and death of those whom they serve. They cut the ropes, break the ladders, cause the fall of rocks, send poisonous vapor; and you will see rich mines abandoned for the fear of them . . . It is they who cause earthquakes . . . They are not only the guardians of the mines, but of hidden treasures, which they allow no one to take…
-Pedro de Valderrama (c. 1617)[1]
By the 16th century, the Ore Mountains of Saxony (known in German as the Erzgebirge) had already been mined for silver for over three centuries. The Ore Mountains run south of Freiberg along what is now the German-Czech border, extending for about 150km (90 miles) east to west and 40km (25 miles) north to south.
One of the earliest references to mining in the area was in a contract dated in the year 1237, which noted a number of swords would be paid for with “good silver from Schneeberg”, one of the key mining centres of the Erzgebirge.[2]
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