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Literature / C. Auguste Dupin
aka: The Murders In The Rue Morgue

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C. Auguste Dupin is the central character of three stories written by Edgar Allan Poe in the 1840s and recognized as pioneering works in the Detective Fiction genre.

  • "The Murders in the Rue Morgue" (1841)
  • "The Mystery of Marie Rogêt" (1842)
  • "The Purloined Letter" (1844)

The stories are narrated by Dupin's friend and roommate, whose name is never given.

The 1932 film Murders in the Rue Morgue is based very loosely on the first story. Dupin is the hero of the Dark Tales video game series, in which he investigates mysteries inspired by Poe's most famous stories (including a couple that actually did have him in them in the first place).

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These stories contain examples of:

  • Author Tract: There's a passage of about a page or so in "The Purloined Letter" in which Dupin explains why mathematicians aren't very good at reasoning. This is tangentially related to the story, but one does wonder if it needed to be explored in such detail.
  • Clueless Mystery: In all the stories, Dupin's solutions depend on clues that aren't revealed to the audience until the summation, if then. In The Murders in the Rue Morgue, for example, the only clue Dupin and the readers both have is the testimony about "the shrill voice". Everything else that Dupin discovers the reader has no way of knowing.
  • Gambler's Fallacy: The narrator expresses a belief in this fallacy in "The Mystery of Marie Rogêt".
    Nothing, for example, is more difficult than to convince the merely general reader that the fact of sixes having been thrown twice in succession by a player at dice, is sufficient cause for betting the largest odds that sixes will not be thrown in the third attempt. A suggestion to this effect is usually rejected by the intellect at once. It does not appear that the two throws which have been completed, and which lie now absolutely in the Past, can have influence upon the throw which exists only in the Future. The chance for throwing sixes seems to be precisely as it was at any ordinary time—that is to say, subject only to the influence of the various other throws which may be made by the dice. And this is a reflection which appears so exceedingly obvious that attempts to controvert it are received more frequently with a derisive smile than with anything like respectful attention.
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  • Gentleman Detective: Dupin is considered the Trope Maker. Dupin came from a wealthy family, although he had been reduced to a more humble lifestyle. Holds the rank of Chevalier (Knight) in the Légion d'honneur. Likes hieroglyphs. Can spell "ratiocination".
  • Great Detective: C. Auguste Dupin.
  • Hidden in Plain Sight: In "The Purloined Letter", a blackmailer's home was searched for an incriminating letter. Even though they searched under every rug, in every drawer, for loose paperwork in every book, and for hollow hidden compartments in the furniture, the searchers never found it because they didn't bother to consider and look closely at a torn and crumpled letter, clearly visible in a card rack hanging on the mantelpiece.
  • I Know You Know I Know: In "The Purloined Letter", Dupin explains that this is the reason he can outwit the police and get his man. The police know who stole the document; the thief knows the police know. The difference between Dupin and the police is that Dupin knows the suspect knows the police know, and the police don't know that.
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  • Important Character, Important Evidence: In "The Purloined Letter", Dupin finds the titular item because he's the only person clever enough to try to think like the thief does.
  • Inner Monologue Conversation: Probably Trope Maker. Dupin is famously capable of responding to his companion's inner monologue, by deducing from body language what he must have been thinking about. In "The Murders in the Rue Morgue", Dupin shows off his general awesomeness by tracking the narrator's train of thought through fifteen minutes of silent walking and several mental topic shifts, and saying exactly the right thing at the end.
  • Killer Gorilla: An orangutan, technically.
  • Locked Room Mystery: "The Murders in the Rue Morgue"
  • Luke, I Am Your Father: Certain critics think D, in "The Purloined Letter", is Dupin's father. Others think the two men may be brothers, as indicated by the reference Dupin makes to the ancient Greek twins Atreus and Thyestes. Still others say certain critics are completely nuts.
  • No Name Given: Dupin's sidekick.
  • Phone-In Detective: Dupin solves the mystery of Marie Rogêt by reading the newspaper accounts.
  • Profiling: How Dupin figures out where the thief of "The Purloined Letter" hid the letter, and how he figures out that the nature of the killer in "The Murders in the Rue-Morgue".
  • Ripped from the Headlines: The murder of Marie Rogêt was inspired by the contemporary real-life mystery surrounding the death of a woman named Mary Rogers in New York. (Notice that "Marie Rogêt" is a Frenchified version of the name "Mary Rogers".)
  • "Shaggy Dog" Story: Although Dupin solves the case of "The Murder of Marie Rogêt", the audience isn't informed of more than Dupin's complex reasoning. This is partly because the story is inspired by real events, which themselves were never solved.
  • Sherlock Scan: Helped establish this trope pre-Sherlock with his C. Auguste Dupin stories.
  • Sidekick: The narrator of Dupin's stories.
  • Smart People Play Chess: Subverted in "The Murders in the Rue Morgue". The story begins with a discussion on the difference between calculation and analysis (the latter being a "true" indicator of intellect), and uses chess as an example of the former, noting that in chess, the winner is typically whoever can concentrate longer, not whoever is smarter.
  • The Summation: "The Purloined Letter"
  • Year X: The stories all take place in the year "18—". We do know from "The Purloined Letter" that they take place during a time when France is a monarchy, so that narrows it down to 1804 - 1840s (when the stories were published). And since The Napoleonic Wars don't seem to be in progress, it may be further narrowed down to 1815 - 1840s.

Alternative Title(s): The Murders In The Rue Morgue, The Mystery Of Marie Roget, The Purloined Letter

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