lying in bed. (My bed stood with its foot towards the window; in front of the window there was a row of old walnut trees. I know it was winter when I had the dream, and night-time.) Suddenly the window opened of its own accord, and I was terrified to see that some white wolves were sitting on the big walnut tree in front of the window. There were six or seven of them. The wolves were quite white, and looked more like foxes or sheep-dogs, for they had big tails like foxes and they had their ears pricked like dogs when they pay attention to something. In great terror, evidently of being eaten up by the wolves, I screamed and woke up. My nurse hurried to my bed, to see what had happened to me. It took quite a long while before I was convinced that it had only been a dream; I had had such a clear and life-like picture of the window opening and the wolves sitting on the tree. At last I grew quieter, felt as though I had escaped from some danger, and went to sleep again." (Freud 1918) Freud's eventual analysis (along with Pankejeff's input) of the dream was that it was the result of Pankejeff having witnessed a "primal scene" — his parents having sex a tergo or more ferarum ("from behind" or "doggy style") — at a very young age. Later in the paper, Freud posited the possibility that Pankejeff instead had witnessed copulation between animals, which was displaced to his parents. Pankejeff's dream played a major role in Freud's theory of psychosexual development, and along with Irma's injection (Freud's own dream, which launched dream analysis), it was one of the most important dreams for the developments of Freud's theories. Additionally, Pankejeff became one of the main cases used by Freud to prove the validity of psychoanalysis. It was the third detailed case study, after "Notes Upon a Case of Obsessional Neurosis" in 1908 (also known by its animal nickname "Rat Man"), that did not involve Freud analyzing himself, and which brought together the main aspects of catharsis, the unconscious, sexuality, and dream analysis put forward by Freud in his Studies on Hysteria (1895), The Interpretation of Dreams (1899), and his Three Essays on the Theory of Sexuality (1905). Later life Pankejeff later published his own memoir under Freud's given pseudonym and