Mrs. A. is twenty-two years old; Russian; married. She suffers periodically from attacks of violent headaches, lasting several days. Family history is good. The patient was brought up in the fear of ghosts, evil spirits, magical influences, and diabolical agencies. Mrs. A. is easily frightened, and has suffered from headaches and pressure on the head for quite a long time, but the pain became exacerbated some five years ago. The attack is sudden, without any premonitory feelings, and lasts from eight hours to two days. The headache often sets in at night, when she is asleep, and she wakes up with frightful pain. At the time of the first attack she was much run down. Otherwise the patient is in good condition, but complains that her memory is getting bad. Patellar reflex is exaggerated. Field of vision is normal. The eyes show slight strabismus and astigmatism, corrected by glasses which did not in the least diminish the intensity as well as the frequency of the headaches. Mrs. A. suffers from bad dreams and distressing nightmares, the content of which she cannot recall in her waking state. She also often has hallucinations, visions of two women wrapped in white, pointing their fingers at her and running after her. She never had any fall, nor any special worry or anxiety, never suffered from any infectious diseases. After a persistent inquiry, however, she gave an account of an accident she met with when a child of eight. Opposite her house there lived an insane woman of whom she was mortally afraid. Once when the parents happened to be away, the insane woman entered the house, caught the child, and greatly frightened her. Another time she was sent out by her parents to buy something in a grocery store. It was night and very dark. She bought the things and on the way back she saw two women in white with hands stretched out running after her. She screamed from great fright and ran home. Mrs. A. is afraid to remain alone, and especially in the dark. She is not so much afraid in the street as in the house. The two women appear to her now and then, and she is mortally afraid of them. The patient was put into hypnotic state. There was marked catalepsy; the eyes were firmly closed, and she could not open them when challenged. Suggestion of general well-being was given and she was awakened. On awakening, she could not remember what had taken place in the hypnotic state.