Born in Budapest in 1903, Ervin Nyiregyhazi (nyeer-edge-hah-zee) was composing at two, giving his first public recital at six, and performing all over Europe by eight. He was soon recognized as one of the most remarkable child prodigies in history and became the subject of a four-year study by a psychologist. By twenty-five, he had all but disappeared. Mismanaged, exploited, and insistent on an intensely Romantic style, his career foundered in adulthood...