Miss Marple sets a trap for Charlotte Blacklock

Jane Marple sets a trap for Charlotte Blacklock by turning Mitzi’s account of the shooting at Little Paddocks into a test of Charlotte’s reaction. Marple arranges a carefully staged moment in which Mitzi appears to reveal what she saw, while suspicion seems to fall elsewhere; then Marple and Sergeant Fletcher wait nearby to learn whether Charlotte will try to buy Mitzi’s silence or silence her by force. The plan converts a concealed observation into a risk Charlotte cannot safely ignore.

The Recognition That Prompts the Plan

Marple’s decision grows out of her recognition that resemblance can be used to disguise identity. Recalling an example involving one woman drawing another’s old-age pension, she says that the comparison helped make a pattern. Her response changes from excited satisfaction to quiet determination: she believes that action is necessary, and quickly, even though she still lacks proof. The trap is therefore not an impulsive accusation but a response to a developing inference that cannot yet be established openly.

Marple devises a possible plan and discusses it with Sergeant Fletcher. Fletcher agrees, although his decision later draws criticism from Craddock, who objects that the sergeant should have reported the plan to him first. Marple then goes to Little Paddocks and recruits Mitzi. Rather than relying on formal authority, she persuades Mitzi by appealing to her self-image and courage, suggesting that she would have been suited to the French Resistance. Marple admits that some of the stories she tells to inspire Mitzi are invented. The persuasion gives Mitzi a role in the investigation, but also makes her the apparent source of a dangerous disclosure.

Turning Mitzi’s Account into a Test

The plan depends on Mitzi appearing to admit that she had considered blackmail, while presenting herself as frightened enough to tell the truth. Through the keyhole of the dining-room, Mitzi had seen Charlotte in the hall with a revolver behind Rudi Scherz. Marple identifies this as an account of what had actually happened. Yet the key in the keyhole meant that Mitzi could not truly have seen the scene as she claimed. Marple’s gambit depends on Charlotte being too shocked to consider that contradiction: what matters in the moment is the apparent danger that Mitzi has seen her.

To sharpen that danger, Craddock pretends to receive Mitzi’s statement sceptically and immediately turns his apparent attack toward Edmund, someone who had not previously been suspected. The performance is designed to make Charlotte believe that the police have not accepted Mitzi’s claim and that their suspicions lie elsewhere. The diversion isolates Mitzi as the one person who might persist and be taken seriously. In Marple’s design, apparent disbelief is not a dismissal of the witness but the condition that makes Charlotte think she can act without immediate scrutiny.

The Kitchen Stakeout

After giving the account, Mitzi leaves the room and returns to the kitchen as Marple instructed. Charlotte follows almost at once. Mitzi appears to be alone, but Fletcher is positioned behind the scullery door and Marple is hidden in the broom cupboard. The close concealment makes the plan a practical ambush rather than a simple conversational test: the investigators are placed to witness what Charlotte does next, while she believes she has an opportunity to deal with Mitzi privately.

Marple anticipates two possible outcomes. Charlotte might offer Mitzi money in exchange for silence, in which case Fletcher could witness the offer; alternatively, Marple fears that Charlotte may attempt to kill her. The plan is built to capture either an attempted bargain or an attempt to eliminate the witness. Its success depends not on Charlotte confessing, but on her response to the belief that Mitzi may expose her.

The Pressure Behind the Trap

Marple explains that Charlotte is no longer acting with calm judgment but is frightened and cornered. The immediate pressure includes the confrontation between Miss Hinchcliffe and Miss Murgatroyd and Miss Hinchcliffe’s departure for the station. Marple believes that, once Miss Hinchcliffe returns, Miss Murgatroyd will explain that Letitia Blacklock was not in the room on the night of the shooting. Charlotte therefore faces another possible disclosure, with little time to contain it. Marple contrasts the hurried, unplanned killing of Miss Murgatroyd with the more deliberate arrangement of the trap: the danger Charlotte perceives makes her capable of acting hastily.

The trap’s significance lies in how it joins inference to observation. Marple cannot yet prove her conclusion, so she creates a situation in which Charlotte may reveal what the investigators need to know through an attempt to control or silence Mitzi. The apparent weakness of the witness, the police’s staged scepticism, and the investigators’ concealed positions all serve one purpose: to make Charlotte believe that the threat is real while keeping her response within reach of witnesses. The plan exposes the vulnerability beneath the assumed identity without requiring Marple to begin with proof she does not have.