Carl Linnaeus, The Lapland Journey, translated by Peter Graves (Edinburgh: Lockharton Press, 1995), p. 117.

The Mountains [1], 09/07/1732, ¶613:

The reindeer were as innumerable as the trees of the forest. They are driven home for milking morning and evening and I saw how, when it was time to drive them home and they did not want to go, they just sent the dog in. It ran to wherever the girl doing the herding directed or waved it, at which the reindeer became very afraid and went in the direction the girl wanted. I also saw how, when the animals were being driven away again while there was a strong east wind blowing, they went in circles, for they wanted to go where the girl did not want and she wanted them to go where they did not want. The reindeer went backwards, round in a circle and forwards again while the dog ran around with the girl. I was told that reindeer always want to proceed against the wind and, when they are allowed to do that, they run steadily and quite quickly, thinking to keep themselves cool. A little later I happened to see all the reindeer standing in the shadow of a high hill because the sun was so hot. They were standing as if packed together on a patch of snow, for they do not eat when it is hot. The mosquitoes were also troublesome.