Hercule Poirot and Frank Howel Evans' Monsieur Poiret, a retired Belgian police officer living in London. A more obvious influence on the early Poirot stories is that of Arthur Conan Doyle. In "An Autobiography", Christie states, "I was still writing in the Sherlock Holmes tradition – eccentric detective, stooge assistant, with a Lestrade-type Scotland Yard detective, Inspector Japp". For his part, Conan Doyle acknowledged basing his detective stories on the model of Edgar Allan Poe's C. Auguste Dupin and his anonymous narrator, and basing his character Sherlock Holmes on Joseph Bell, who in his use of "ratiocination" prefigured Poirot's reliance on his
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