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

The Prefecture of Piteå, 14/06/1732, ¶438:

There are splendid forests of pine and spruce and an abundance of birch; consequently, there is no part of Sweden more pleasant to travel through in summer. The local people make most of their money from planks sold at 16 silver öre per dozen and from tar at 6 copper daler per barrel.