He became acquainted at a sanitarium with a young woman who soon became his sweetheart. One of his most intimate friends was also at that sanitarium. He asked his friend to try his luck with the lady because he wanted to test her faithfulness. The friend hesitated. He was afraid of a misunderstanding and the woman was not worth that to him. Then our subject tried to bring him and his sweetheart together in another way. He wagered a large sum of money that he could not get at the girl. His friend accepted the wager, and three days later proved that he had won the bet. O. L. wanted to hear every detail about the seduction and became so enraged that he could have killed his friend. Then that friend seduced again another sweetheart of his, a few months later he attacked him on the street and would have beaten him up if a few colleagues had not restrained him. Now here in Vienna he is convinced that “that d—— fellow” will seduce also his present sweetheart, a girl whom he truly loves. But if so, he will find the fellow and kill him as well as the girl. The woman has a brother who plays an important rôle in the psychogenesis of this love. Once the woman told him how devotedly she loved her brother. She could understand how a sister may give herself to a brother. Now he urged the woman to give herself to the brother, setting up but one condition: he should witness the act. This phantasy assumed compulsive strength. On every occasion he tortured her, insisting that she ought to grant him the wish, and he kept calling in the brother when she did not want him. Once they were alone. He broke his word and they drank merrily. He got very drunk and made a passionate love declaration to his sweetheart’s brother, begging him to accompany him to the house and take the sister’s place. His mother died when he was 15 years of age. The father engaged a young woman to take care of the house and he fell in love with her. At the same time he also hated her, fearing that his father would disinherit him in favor of this woman. He even planned to put the woman out of the way with poison. Wholly unconscious and most deeply repressed is his love for the father, whom he worries and to whom he causes no end of trouble. He was at the threshold of a wonderful career, all teachers had prophesied that he would be some day one of the world’s greatest violinists. His first concert was an unprecedented success. Then his neurosis broke out and now he is through with his career. Done with it and with life.