The author discusses several "crises" in the life of Doris Fischer that were thought to contribute to the development of two to five secondary personalities such as her father's abuse of alcohol and the death of her mother, her "friend and protector." Physical attributes, personality traits, and characteristic behaviors of each of these personalities are described. The author attributes the importance of this particular case both to a doctor's near hourly observations of her for three years and the success of her treatment. The treatment process and its effects on the various personalities are described.