This classic short story is narrated in the first person. Poe chooses to tell this tale through the mouth of a bystander, a friend of Auguste Dupin, who is therefore able to observe all the same events that he does and not be able to discern their significance, thus highlighting the genius and power of reason of Dupin, who interestingly was a character who inspired many other detective novels and characters, such as Sir Arthur Conan Doyle's famous Sherlock Holmes. Note for example how the narrator responds to Dupin's question about what he thinks happened in the Rue Morgue:
I felt a creeping of the flesh as Dupin asked me the question. "A madman," I said, "has done this deed--some raving maniac, escaped from a neighbouring Maison de Sante."
Note the use of the first person "I" to indicate the first person narration. This quote also identifies the way that the narrator is used as a foil for Dupin. Where the narrator, who is meant to be seen as a "normal" individual with average powers of perception sees only a mystery and has to leap to dramatic and illogical solutions to solve the problems that are presented before him, Dupin, by applying his power of reason, is able to reach the truth of the matter. The style of narration therefore highlights the genius of Dupin and his method of reason.