Child B is a girl, born November 25, 1912. She was discovered in a private school in the course of a systematic survey made by Dr. E. H. Malherbe, who was at the time a graduate student at Teachers College, Columbia University. To Dr. Malherbe the present writer is indebted for introduction to this child, and also for data on first tests as well as for other information. FAMILY BACKGROUND Child B is descended from colonial settlers in this country. Her ancestors came chiefly from the British Isles, as set forth in her family history. Her parents are not related by blood so far as can be known. The paternal grandfather was of English descent; the paternal grandmother of Irish descent. No dependent or incompetent relatives of the father are known. All are self-sustaining. The maternal grandfather was of Irish-Spanish blood. The maternal grandmother was of Irish descent. No incompetent or dependent relatives are known. _Father_. Child B's father was born in Vermont and was 42 years old when B was born. He is a high school graduate and a graduate of the United States Military Academy at West Point. He passed the entrance examinations for the latter institution at the age of 16 years and was at that time the youngest student ever admitted to the Academy. He has held posts of extraordinary trust in the pursuit of his profession, and is at the time of this writing an officer of high rank in the United States Army. _Mother_. Child B's mother is a graduate of a Catholic parochial high school and of the College of Mount St. Vincent. She was married at an early age and her career has been that of housewife and mother, no profession having been followed previous to marriage. Although she is the mother of seven children and mistress of a large household, B's mother found time to attend courses in law and economics at Columbia University while the family lived in New York. She was 39 years old when B was born. _Noteworthy relatives_. Relatives of note in the paternal branch include B's great-grandfather, who was a physician, founder of the Vermont Academy of Medicine in the early years of the nineteenth century, and a professor of surgery there. There are also among relatives an admiral of the United States Navy, [1] a physician of wide reputation, a commander of the United States Navy, [2] and a practical tin- and coppersmith who was an inventor. This family branch as a whole finds its average level of achievement in the professions. The maternal branch includes a woman of extraordinary business ability, a priest who was a scholar and organizer of marked ability, and a mining engineer of unusual achievement. The performance level of the family lies, on the average, in business and the professions.