 Poe may also have been expanding on previous analytical works of his own including the essay on "Maelzel's Chess Player" and the comedic "Three Sundays in a Week". As for the twist in the plot, Poe was likely inspired by the crowd reaction to an orangutan on display at the Masonic Hall in Philadelphia in July 1839. The name of the main character may have been inspired from the "Dupin" character in a series of stories first published in Burton's Gentleman's Magazine in 1828 called "Unpublished passages in the Life of Vidocq, the French Minister of Police". Poe would likely have known the story, which features an analytical man who discovers a murderer, though the two plots share little resemblance. Murder victims in both stories, however, have their neck cut so badly that the head is almost entirely removed from the body. Dupin actually mentions Vidocq by name, dismissing him as "a good guesser".
