“Method and order”

“Method and order” is the investigative discipline that allows Hercule Poirot and Colonel Race to move beyond a persuasive but mistaken account of Linnet Doyle’s murder. It means more than keeping the inquiry tidy: evidence must be arranged and interpreted without forcing contradictions to fit a preconceived theory, and the case must be reconsidered when a detail resists explanation.

An Ordered Inquiry

When Race asks what they should do next, Poirot recommends continuing to question the passengers in an orderly way. Race’s own practice gives that principle a practical form: he makes a brief précis of the facts as they proceed, explaining that this keeps his mind free of confusion. Poirot endorses the approach, telling him, “Method and order, they are everything.” Their exchange presents orderly procedure not as a substitute for judgment but as a way to preserve clarity while facts accumulate.

The Pistol as a Contradiction

The principle becomes most consequential in Poirot’s attention to Jacqueline de Bellefort’s pistol. The apparent case seemed straightforward: someone had overheard Jacqueline and Simon Doyle, retrieved her pistol, killed Linnet, and marked the wall with the letter J, directing suspicion toward Jacqueline. But the killer then threw the incriminating weapon overboard. Poirot insists that this sequence does not make sense: if the purpose was to implicate Jacqueline, disposing of the pistol undermined that purpose. Rather than treating the discrepancy as incidental, he recognizes it as the problem the explanation must solve.

Revising the Theory

Poirot and Race had initially assumed that the murder was an unplanned crime committed when an opportunity arose. Poirot later acknowledges that this first conception was wrong and that the investigation must begin again. Race describes detective work as wiping out false starts; Poirot agrees that investigators err when they adopt a theory and discard any fact that does not fit it. For him, the troublesome facts carry particular weight: the pistol’s removal had signified something, even before he understood what.

From Anomaly to Explanation

At the explanation, Poirot identifies the mistaken assumption behind the early reasoning. The crime was not spontaneous but carefully planned and timed, including the drugging of Poirot’s wine bottle so that he would be asleep during the night’s events. In that revised account, the pistol was removed because the murderer had to remove it, not because its disposal made sense as part of a simple attempt to frame Jacqueline. “Method and order” therefore marks a process of correction: the investigator returns to the beginning, reconsiders the sequence, and lets the inconvenient clue alter the theory rather than explaining it away.