<P> As the first fictional detective , Poe 's Dupin displays many traits which became literary conventions in subsequent fictional detectives , including Sherlock Holmes and Hercule Poirot . Many later characters , for example , follow Poe 's model of the brilliant detective , his personal friend who serves as narrator , and the final revelation being presented before the reasoning that leads up to it . Dupin himself reappears in `` The Mystery of Marie Rogêt '' and `` The Purloined Letter '' . </P>
<P> As the first fictional detective , Poe 's Dupin displays many traits which became literary conventions in subsequent fictional detectives , including Sherlock Holmes and Hercule Poirot . Many later characters , for example , follow Poe 's model of the brilliant detective , his personal friend who serves as narrator , and the final revelation being presented before the reasoning that leads up to it . Dupin himself reappears in `` The Mystery of Marie Rogêt '' and `` The Purloined Letter '' . </P>
who narrates the murders in the rue morgue
who narrates the murders in the rue morgue
his personal friend
his personal friend