Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 189.
Northern Husbandry, 23/09/1732, ¶1109:
South-east of the town but right by the town-gates, they had started to mine for copper but given up at a depth of 30 to 35 feet. The ore was mica-like and graphite-coloured, the sand alongside was loose mica and as if decomposed. I do not believe that it contains copper or any other metal, which is why the mine was soon deserted.