 "The Murders in the Rue Morgue" also established many tropes that would become common elements in mystery fiction: the eccentric but brilliant detective, the bumbling constabulary, the first-person narration by a close personal friend. Poe also portrays the police in an unsympathetic manner as a sort of foil to the detective. Poe also initiates the storytelling device where the detective announces his solution and then explains the reasoning leading up to it. It is also the first locked room mystery in detective fiction.
