The story of this girl's falsifications and fabrications as obtained from her people is exceedingly long. As a young child she was not over-indulged in fairy stories, and the parents noticed nothing peculiar about her then. She was not regarded as a child who had any unusual powers of imagination. Somewhere about 12 years of age, her parents cannot be certain just when, they noticed she began the exaggeration and lying which has continued more or less ever since. In the past two or three years this has grown upon her and she has been making not only untrue statements, but has been concocting peculiarly long and intricate fabrications. The curious thing to the family is that Janet seems to have little shrewdness in lying; of normal ability in other things, she seems to have the mind of a child in this. Very many deceptions are discovered in short order, but even then the girl will sometimes argue at length that what she has said was really the truth. The parents insist she must know that she is lying, but her anomalous behavior has been so excessive that they have long felt she should be studied by a psychiatrist. Her mother asserts there is some periodicity in Janet's tendencies. She maintains she has noticed that most of her lies are told in the two or three days preceding menstruation. (This was certainly not true during the period we observed the girl.) The parents are sure there has never been any particular mental shock, and the mother has always felt that Janet was particularly free from contamination by bad children. At times she seems to realize her own bad behavior, and not long ago said she would become a nun, for in the tranquil life of the convent her tendency to lying would not be stimulated. Further inquiry brought out the fact that it was true, as Janet stated, that in her high school course she became nervous to the extent of jerking and twitching, and that also for a time she stuttered. Their physician said, however, that there was no definite nervous disease. As a young child the parents never thought this girl in any way different from the rest of the family. As she grew older she has been regarded as physically the most robust, but, as she stated to us, she has done the poorest intellectual work and that has often been a matter of family comment. The other children are careful truth tellers.