Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 38.
Hälsingland, 15/05/1732, ¶94:
I had travelled more or less exactly 1 3/4 miles into the province when I noticed red soil by the roadside. It might be suitable for use as a red dye if it exists in large enough quantities and proves to be of good quality.