Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 103.
The Prefecture of Luleå [1], 24/06/1732, ¶495:
I got silver ore from Nasafjäll here, also the unusual iron ore from Luleå Lappmark that is called Old Man’s Silver: still unprospected, formerly exploited a little, now extracted again -gives a 60 percent yield, 7 miles from Kvikkjokk, called Rutivari.