Question: Which main antagonist in some of the Sherlock Holmes stories was holmes old arch-enemy, in Sherlock Holmes - The Musical
Sentence (from "Sherlock Holmes: The Musical"): The story concerns a 1901 confrontation between Holmes and his old arch-enemy, Professor Moriarty; Moriarty's brilliant daughter Bella proves to be an even more determined (and beautiful) foe than her father.
Relevant evidence: Yes