The physical examination showed a normally developed girl: weight 108 lbs.; height 5 ft. 3 in. Well shaped head and rather delicate features. Her teeth showed a defective line in the enamel near the gums on the incisors and the cuspids. Bites her finger nails. Slight irregularity of the left pupil. Careful examination of the eyes in other ways entirely negative. Prompt reaction of pupils to light. No sensory defect of importance. Knee jerks active. Heart sounds normal, and all other examination failed to show defect. Complained of frequent headaches, but these were not of great severity. After information from the mother we felt that Libby's feelings of weakness and tremblings were probably of the hysterical variety. During the period in which we had Libby under observation she showed more or less emotional disturbance, but even so we were able to assure ourselves that her mental ability was fair. We did not expect good results from formal education because in her case it had been very irregular. Many of our ability tests, however, were done well, but she failed where she was asked to demonstrate good powers of concentration and attention. We noted that she showed a very eager attitude toward her work, but was nervous about it. Always pleasant demeanor. Most significant results were obtained on the ``Aussage'' or testimony test. After viewing our standard picture she volunteered only 8 details in free recital. On cross-examination she gave 21 more, but no less than 7 of these were incorrectly stated. Then she accepted the 4 suggestions which were given her. This result from a girl of her age and ability was exceedingly poor. We never found any evidence whatever of aberrational mental conditions. Our final diagnosis was ``fair in mental ability with poor educational advantages.'' It should be definitely understood in considering this case that even to the time of our last interview with Libby, after she had acknowledged her own extensive prevarications, we had evidences of the unreliability of her word. In giving details she never made any special effort to tell the truth, whether it was in regard to the date of her father's death or any other immaterial detail. We were inclined to classify her as a pathological liar, as well as a case of pathological false accusation. Her traits as a liar and a generally difficult case have, we learn, been maintained during her stay up to the present time in an institution for delinquent girls.