In this folk tale the exclusively sexual foundation of the wandering is quite plainly expressed. The ghost makes use of a voice, complaining and threatening at the same time, which the bridegroom believes to be the call for help of his best friend, and the bride on the other hand imagines it the voice of her cousin, who had been found dead two years before, perhaps after she had taken her own life because unhappy in love. Both may be driven by sexual jealousy--I offer this as a hypothesis--which would not permit the other sexual gratification which is denied to himself or herself, the friend perhaps meaning jealousy from a homosexual tendency. The ghost having accomplished its purpose at the hour of midnight and in the light of the full moon, the lady swore "to take no rest on a night when the moon was full until she had gone to bed with her bridegroom." That is the kernel of the entire myth, the naïve and yet apparently conclusive folk interpretation of the riddle of moon walking, at least in its most frequent form. I have above taken it for granted that Maria's erotism was satisfied through her care for her father. That must of course be understood with some qualification. For she could play the rôle of mother only as housekeeper, not as wife. The former is satisfying therefore only so long, until stronger sexual impulses awaken through external stimuli or, according to rule, through the natural development of a maiden. When once that has come to pass, one so disposed to it as Maria was, begins to wander in the moonlight. Why then, it may further be asked, does Maria seek for her childhood bed, if the goal and the aim of the wandering is the sexual satisfaction of the maiden? In the case analyzed at the beginning the compelling motive was a sexual self stimulation upon the mother, in later years in the loved object whoever it was, male or female. In most cases, since normal sexual feeling predominates, the aim of the sleep walking is that of the folk tale, to go to bed with the lover. That would explain without difficulty the scene of the union in Maria's case, as soon as she had come to know Eisener.