Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 103.
The Prefecture of Luleå [1], 26/06/1732, ¶505:
The Lapps use birch bark for tanning. NB. They buy the hides from the farmers and tan them themselves. This leather is much wtter and softer than that which the farmers tan, but the farmers will not give up their old habits.