Professor Moriarty, a.k.a. the "Napoleon of Crime", was set as Sherlock Holmes's arch-enemy and lone intellectual equal (perhaps Mycroft excepted). He was one of the most enigmatic villains of the Sherlock Holmes stories, if not in all literature. So, isn't it a trifle bit ironic that he would be presented in a rather quiet, no-frills bent Billiard? Or is it perhaps a deeper insight to the character of Moriarty, a man who manipulated Holmes from the deep recesses of the shadows, often operating unseen, hiding in the world of academia; which would make this beefy jaw-hanger with its understated styling a perfectly fitting choice.