What was John Garrideb’s objective in inventing the story of Alexander Hamilton Garrideb and his legacy?

John Garrideb was actually Killer Evans who wanted to get into the apartment where Nathan Garrideb stayed. Evans wanted the counterfeit press of British currency made by a criminal which was hidden in Nathan’s apartment without his knowledge. But since Nathan hardly left the place, he made up this bizarre story to send him afar so that he gets time to steal the press.