Moriarty! He was, according to Sherlock Holmes, 'the Napoleon of crime', - a mathematical genius gone mad who was the thinker and organiser behind nearly every great crime that came Holmes's way. Why then was the professor, whose evil pervaded the city like a bleak November fog, so seldom mentioned in Dr. Watson's previous accounts of the Great Detective's exploits at the time? Now Watson finally tells all in this newly discovered...