Early in 1910 the solemn boy on the opposite page stood at a podium in his velvet knickers and, with halting eleven-year-old gravity, addressed a hundred Harvard professors and advanced mathematics students on “Four-Dimensional Bodies.” Though his speculations were too abstruse for some in the audience, Professor Daniel Comstock of MIT followed them all and, at the end of the talk, assured baffled reporters that the boy, William James Sidis, was destined to become one of the great mathematicians of the age. Papers across the country picked up the story, and for a while Sidis was the most famous child in America.