Hercule Poirot ' s Methods

In The Mysterious Affair at Styles, Poirot operates as a fairly conventional, clue-based detective, depending on logic, which is represented in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Irritating to Hastings (and, sometimes, to the reader) is the fact that Poirot will sometimes conceal from him important details of his plans, as in The Big Four where Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels, partly because there is rarely a narrator so there is no one for Poirot to mislead.

As early as Murder on the Links, where he still largely depends on clues, Poirot mocks a rival detective who focuses on the traditional trail of clues that had been established in detective fiction by the example of Sherlock Holmes: footprints, fingerprints and cigar ash. From this point on he establishes himself as a psychological detective who proceeds not by a painstaking examination of the crime scene, but by enquiring either into the nature of the victim or the murderer. Central to his behaviour in the later novels is the underlying assumption that particular crimes are only committed by particular types of person.

Poirot's methods focus on getting people to talk. Early in the novels, he frequently casts himself in the role of "Papa Poirot", a benign confessor, especially to young women. Later he lies freely in order gain the confidences of other characters, either inventing his own reason for being interested in the case or a family excuse for pursuing a line of questioning.

"To this day Harold is not quite sure what made him suddenly pour out the whole story to a little man to whom he had only spoken a few minutes before."

Poirot is also willing to appear more foreign or vain than he really is in an effort to make people underestimate him. He admits as much:

"It is true that I can speak the exact, the idiomatic English. But, my friend, to speak the broken English is an enormous asset. It leads people to despise you. They say – a foreigner – he can't even speak English properly. Also I boast! An Englishman he says often, "A fellow who thinks as much of himself as that cannot be worth much. And so, you see, I put people off their guard."

In the later novels Christie often uses the word mountebank when Poirot is being assessed by other characters, showing that he has successfully passed himself off as a charlatan or fraud.

All these techniques help Poirot attain his principal target: "For in the long run, either through a lie, or through truth, people were bound to give themselves away …"