The Murders in the Rue Morgue

'The Murders in the Rue Morgue' is a short story by Edgar Allan Poe published in Graham's Magazine in 1841. It has been described as the first modern detective story; Poe referred to it as one of his 'tales of ratiocination'.
The unnamed narrator opens with a lengthy commentary on the nature and practice of analytical reasoning, then describes the circumstances under which he first met Dupin during a visit to Paris. The two share rooms in a dilapidated old mansion and allow no visitors, having cut off all contact with past acquaintances and venturing outside only at night. One evening, Dupin demonstrates his analytical prowess by deducing the narrator's thoughts about a particular stage actor, based on clues gathered from the narrator's previous words and actions.