Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 177.
Österbotten, 13/08/1732, ¶992:
They catch powan in a strange way here. Like the salmon, the powan swims against the current and they therefore only fish for them at large falls that the powan cannot ascend. The fishermen have a neat net with which they walk out half-naked in the most powerful rapids, often with a rope around them held by a man who stays on the bank to prevent them being carried away by the current. Thus they wade out and fish.