Child F was a boy whose ability was identified as the result of a mental survey made with group tests in P.S. 14, Manhattan. [1] His score in these tests was unbelievable, and he was summoned for testing with the idea that he must have been coached. An individual Stanford-Binet test, however, showed a phenomenal record similar to all other tests given him, including an Army Alpha. He was referred to a Special Opportunity Class at that time being organized in P.S. 165, Manhattan. FAMILY BACKGROUND Although detailed study of F's ancestry is available, a brief summary of the facts appears to be all that is here needed, for the ancestry throws little light on the boy's extraordinary mental ability. F's paternal grandfather was of Scottish parentage, born in Canada. He was a reasonably successful worker in the printing trade, appears to have been well balanced and socially adjusted, and showed no exceptional traits. He had little education and no special interests. He died of apoplexy at 51 years of age. F's paternal grandmother, born in Albany, New York, had a public school education (probably). She is still living [[1924]], clerking in a store after her husband's death. She appears to have no special interests outside her home life; is said to be quick and nervous, easily excited, and prone to worry. F's maternal grandfather was born in New York State, of German parentage. He is still alive [[1924]], at the age of 70, and is very active. His education was limited, but he is an excellent reader and is well informed. He is fond of music, is an active churchman and a choir leader. He is said to be quick-tempered, impulsive, and affectionate. He mixes well with people, and has some leadership qualities. He has always worked as a paper hanger and painter, his business being on a small scale. F's maternal grandmother was born in New York State; the nationality of her parents is not recorded. She had a public school education. Her interests are limited to home and Red Cross activities. She is friendly and sociable, impulsive, affectionate in disposition, and has a keen sense of humor. F has several uncles and aunts, none of whom presents any qualities of striking interest. All appear to be normally effective and well adjusted, competent on a small-town scale, enjoying their homes, and taking part in local activities and organizations. F has one brother, younger than himself, born April 2, 1920. He was given a Stanford-Binet examination, May 13, 1924, by Leta S. Hollingworth, being then 4 years 1 month of age. His Mental Age was 6-0, yielding an IQ of 147. This brother has strong musical inclinations, was a choir boy, and subsequently took instruction in singing.