Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 92.

The Prefecture of PiteĆ„, 14/06/1732, ¶442:

A little farther on I saw a low-lying hill close to the highway. It was completely covered with spruce brushwood and, when I removed some, the hill had clearly been burnt and blasted. It is possible that someone had expected to find ore here but I could see no sign of anything like it. I took a few stones and kept them.