Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 188.
Northern Husbandry, 20/09/1732, ¶1096:
In general, however, beaver castor is a blessed and much tested panacea used to bring on labour pains in women in childbirth, though some people use saffron in hot wine.