Allerton

Allerton is a charming, sexually opportunistic guest at Styles whose overlapping pursuit of Judith Hastings and affair with Nurse Craven make him appear a ready-made villain. More importantly, Stephen Norton turns Allerton’s romantic entanglements into stage business: by manipulating what Arthur Hastings sees and hears, Norton makes him mistake Nurse Craven for Judith and helps drive him toward murder.

Identity and Introduction

The evidence presents Allerton through the effect he has on the household and on Hastings: he is a plausible romantic rival, but also a man whose attentions are not confined to one woman. His involvement with Judith appears to Hastings to be serious enough to threaten his daughter’s future, while the later revelation that Allerton is also involved with Nurse Craven exposes the incompleteness of that impression. Allerton’s role depends on the gap between what Hastings thinks he knows and what he has actually observed.

That gap is established around a supposed plan for Judith to go to London. Allerton leaves early for Ipswich, apparently keeping to the arrangement and assuming Judith will go up to London as expected. Hastings, however, has no direct confirmation that Judith accepted the proposed rendezvous. He has mistaken a plan and his own fears for proof of her consent. Allerton’s departure therefore matters less as evidence of his feelings than as a circumstance Norton can exploit: Hastings is left to imagine what will happen while Allerton is away.

The Pursuit of Judith and Nurse Craven

Allerton’s connection with Judith is real enough to give Norton’s deception a credible surface, but it does not explain the scene Hastings believes he witnesses. Norton knows that Allerton is going to meet Nurse Craven in the summerhouse. After Hastings sees Allerton and a woman kiss, Norton pushes him back around the corner. He then lets Hastings go after a brief argument, but accompanies him as he listens to Allerton speaking. The overheard sentence seems to confirm Hastings’s assumption, while Norton swiftly draws him away before he can discover that the woman is Nurse Craven, not Judith.

The revelation changes the meaning of Allerton’s apparent romantic pursuit. His affair with Nurse Craven has advanced beyond the flirtation he has with Judith, and Nurse Craven is furious because she cannot go out for the day. These details expose a more complicated arrangement than Hastings’s jealous picture of Allerton courting his daughter. Allerton is not simply pursuing one woman; he is maintaining overlapping relationships, and Norton uses that concealed overlap to construct a scene Hastings will misread.

Reputation and Narrative Function

Allerton repeatedly appears in a melodramatic light. When he comes up during a discussion of a bottle carried on the evening Barbara Franklin died, thunder rumbles in the distance, and Hastings reflects that Allerton seems cast as the villain. Yet the same passage undercuts that theatrical suspicion: Allerton was away from the house on the night of Barbara’s death, and Hastings can see no possible motive for him. The contrast between his villainous appearance and the missing evidence makes him a red herring rather than a solution to the poisoning.

His absence also shapes the household’s atmosphere. When Allerton has still not returned, Hastings feels that the house is happier and less oppressive without him. This is Hastings’s impression, not a demonstrated verdict on Allerton’s conduct; it records how strongly the man’s presence has become associated with tension. But the story’s decisive use of Allerton is not to make him responsible for Barbara’s death. It is to make his plausible role as a seducer available to Norton’s deception.

Hastings, Norton, and the Misread Scene

In Poirot’s reconstruction, Norton exploits several vulnerabilities in Hastings at once: his love for Judith, his sense of paternal responsibility, his self-importance, his loyalty to his wife, his vanity about having learned the detective’s trade, and his jealousy of a man who might take his daughter away. Allerton’s behaviour supplies Norton with the apparent evidence Hastings needs to turn those feelings into certainty. Hastings accepts that the woman with Allerton is Judith despite never seeing her face or hearing her speak; even the next morning, he believes Judith has changed her mind about going to London.

The facts contradict that conclusion. Judith was not going to London that day, while Nurse Craven was the person who expected to be away and was angry that she could not go. By arranging the encounter and controlling Hastings’s view of it, Norton makes Allerton’s affair with Nurse Craven look like an assignation with Judith. Hastings responds not by checking the evidence but by deciding to commit murder. Allerton’s relationships therefore become the mechanism of a psychological trap: the danger lies not only in his conduct, but in Norton’s ability to make Hastings treat an incomplete glimpse as proof.

The mistaken belief that Judith has yielded to Allerton’s proposals briefly governs Hastings’s emotions. When he discovers that Judith has not gone to the rendezvous, relief overwhelms his earlier despair; he recognizes that he never actually heard her assent. Allerton, meanwhile, has gone to Ipswich expecting the original arrangement to stand and is destined, in Hastings’s grim anticipation, for disappointment. The episode shows how quickly Hastings’s interpretation shifts when he distinguishes what he inferred from what he knows. At the same time, Poirot’s later explanation makes clear that Norton had deliberately prepared the misleading impression on which Hastings acted.

Change and Significance

Allerton remains important as an object of suspicion, but the evidence does not make him the murderer of Barbara Franklin or the author of Hastings’s murderous plan. He is away from Styles on the night of Barbara’s death; Norton, not Allerton, controls the staging of the summerhouse encounter; and Hastings’s conclusion about Judith arises from a deliberately engineered misidentification. The distinction separates apparent villainy from actual responsibility without making Allerton’s conduct innocent or uncomplicated.

His narrative function is consequently double. As a womanizer involved with both Judith and Nurse Craven, Allerton gives Hastings’s jealousy a credible target. As a conspicuously villainous figure who nevertheless lacks the relevant opportunity and motive in Barbara’s case, he also draws suspicion away from the person shaping events behind the scenes. The plot uses his romantic entanglements not as a final answer to the mystery, but as material from which Norton manufactures false certainty—and as a test of Hastings’s readiness to mistake a compelling story for established fact.