Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 166.

The Prefecture of LuleĆ„ [2], 29/07/1732, ¶908:

29th. Lapp tanning. First the birch-bark is stripped from the tree and scraped. While it is still fresh, boil it in water for the same length of time as fish. Let it cool to hand-heat and then lay the hide in it. The hide should first have been rendered hairless by dipping it in tepid water and burying it in the earth at the back of a pit, taking it up once a day and softening it in warm water until the hair loosens. Then the hair is scraped off with a scraper and the hide is placed in the tanning solution without being dried first. The following day it (namely, the tanning solution and water) is heated up again and, when it has cooled, the hide is put in it. On the 3rd day it is hung up in the shade to dry in the wind. They often cut it up for shoe-leather when it is half-dry. NB. They make their shoes without using a last and the work is done by the womenfolk, who always use sinews for the stitching.