The Murders in the Rue Morgue Jean-Jacques Rousseau: "to deny that which is, and explore that which is not"). In a letter to friend Dr. Joseph Snodgrass, Poe said of "The Murders in the Rue Morgue", "its "theme" was the exercise of ingenuity in detecting a murderer." Dupin is not a professional detective; he decides to investigate the murders in the Rue Morgue for his personal amusement. He also has a desire for truth and to prove a falsely accused man innocent. His interests are not financial and he even declines a monetary reward from the owner of the orangutan. The revelation of the actual murderer
The Murders in the Rue Morgue on the language the murderer spoke, Dupin concludes they were not hearing a human voice at all. He and the narrator examine the house thoroughly; the following day, Dupin dismisses the idea of both Le Bon's guilt and a robbery motive, citing the fact that the gold was not taken from the room. He also points out that the murderer would have had to have superhuman strength to force the daughter's body up the chimney. He formulates a method by which the murderer could have entered the room and killed both women, involving an agile climb up a lightning rod