From the fairly intelligent mother, who cooperated well with us, we obtained a carefully stated developmental history. During pregnancy with Libby the mother was run over by a bicycle, but was not much injured. The child was born at full term and was of normal size and vitality. Instruments were used, but no damage was known to have been done. Libby walked and talked early. A couple of times when she was an infant she had convulsions, but never after that. From 7 weeks until she was 3 years old there was constant trouble on account of some form of indigestion. For a time at that age she was in the hospital, but the mother was never told exactly what the trouble was. Her stomach was large. As an older child she was subject to fits of anger when she could not have her way. She never had anything that was suggestive of epilepsy. Twice she fainted, but once was when she came home half frozen one winter's day. At 11 years she had pneumonia. She menstruated at 14 years. The heredity and family history in this case is of great interest. Libby's mother went to work for her first husband's family in the old country. At about that time this man's first wife died, but he had previously left her. He came of a good family, he was himself, however, a hard-drinking man. He left two children by his first wife with his parents and came to this country with Libby's mother. Here they lived in a common-law marriage relationship for many years, and two children (one of them Libby) were born to them. The man continued to be a terrible drunkard and was probably insane at times. He once bought a rifle to kill his family. He was notorious for his great changeableness of disposition. Sometimes he would be very pleasant, and then quickly be seized by some impulse when he would grind his teeth, become very angry, and use vile language. Even when sober he would go along talking to himself and people would follow him on the street to hear what he was saying. He threatened often to kill his wife. He deserted her at times for months together. He only partially supported his family and his wife worked as a washerwoman. She left him once, but later went back to him.