C. Auguste Dupin prefect "G", who appears in all three stories seeking his counsel. In "The Murders in the Rue Morgue", Dupin investigates the murder of a mother and daughter in Paris. He investigates another murder in "The Mystery of Marie Rogêt". This story was based on the true story of Mary Rogers, a saleswoman at a cigar store in Manhattan whose body was found floating in the Hudson River in 1841. Dupin's final appearance, in "The Purloined Letter", features an investigation of a letter stolen from the French queen. Poe called this story "perhaps, the best of my tales of ratiocination". Throughout
André Marie Jean Jacques Dupin "Principia Juris Civilis", 5 vols. (1806); "Mémoires et plaidoyers de 1800 au 1ier janvier 1830", in 20 vols.; and "Mémoires ou souvenirs du barreau", in 4 vols. (1855–1857). His brother, Pierre Charles François Dupin, was a mathematician. André Marie Jean Jacques Dupin André Marie Jean Jacques Dupin (1 February 17838 November 1865), commonly called Dupin the Elder, was a French advocate, president of the chamber of deputies and of the Legislative Assembly. Dupin was born at Varzy, in the Nièvre "département", in France. He was educated by his father, who was a lawyer of eminence, and at an early age