Alan Carstairs is murdered in Marchbolt and his body misidentified

Alan Carstairs's murder at Marchbolt is both a killing and an engineered misidentification: Roger Bassington-ffrench used the fog to push him from a cliff, then changed the evidence so the body would be identified as someone else. The deception temporarily hid who had died, but Carstairs's last words and the photograph planted on him would make the supposed identification a weakness in the conspirators' plan.

Background and Motive

Carstairs had become dangerous because his investigations were approaching the identity of Moira Nicholson. Roger later explained that Carstairs was following a lead connected to Evans. The cook Rose Chudleigh could not be traced; she had gone north. Carstairs did, however, discover Evans's married name and set out for Marchbolt. Roger understood the risk: if Evans recognized Moira Nicholson as the woman who had used the name Mrs Templeton, matters could become difficult. Moira had also spent time in the household, and the conspirators did not know how much she might have learned.

Roger described Carstairs as a serious nuisance and said that he decided Carstairs had to be suppressed. This account makes the murder a deliberate response to the danger of exposure, rather than a chance fall. The identity question at its center was not simply who had died, but what Carstairs knew about the woman whose changing identity linked the investigation to the conspiracy.

The Murder on the Cliffs

Roger was close behind Carstairs when the mist came up. In that cover, he crept nearer and gave Carstairs a sudden push, which sent him over the cliff. The fog helped make the death appear to be an accident: the same landscape that concealed the killer also obscured the circumstances of the fall.

Bobby Jones later told Moira Nicholson that Carstairs had fallen over the cliff at Marchbolt, where Bobby lived, and that Bobby and Dr Thomas had been the ones to find him. In their conversation, Bobby added that Carstairs had carried Moira's photograph in his pocket. Moira recognized the dead man as Alan and responded with sadness, recalling his faithfulness. She asked when he had died; Bobby said it was about a month earlier, on October 3. Her recognition briefly restores the personal identity that the substituted evidence was designed to erase, even as she does not then disclose what she knows about the crime.

The Altered Evidence and False Identification

After pushing Carstairs, Roger did not know what incriminating material he might be carrying. He was left alone with the body for a short time, long enough to search it. Carstairs had a photograph of Moira, obtained from photographers and apparently intended to help identify her. Roger removed that photograph, together with letters and other identifying material, and planted a photograph of a member of the gang instead. The act turned an intimate trace of Carstairs's life into evidence pointing away from his real identity.

The false identification succeeded at first. A woman presented as the victim's sister and her brother-in-law came down and identified the body, and Roger believed that everything had gone satisfactorily. In the larger deception, the planted photograph of Amelia Cayman helped the corpse pass as Alex Pritchard. The substituted image and the impersonated relatives worked together: one supplied a misleading visual clue, while the other gave that clue the appearance of family confirmation. The body could therefore be treated as identified even though the identification concealed that the dead man was Carstairs.

Discovery and Consequences

The arrangement began to unravel when Bobby reported that Carstairs had recovered consciousness before he died and had been saying things. Among them was the name Evans. That detail made the concealed identity newly dangerous because Evans was actually in service at the Vicarage. Carstairs's final words had survived the attempt to strip away letters and identifying papers; even without those documents, he had left a lead that connected his death to the conspiracy's vulnerable secret.

Roger admitted that the conspirators were rattled and had lost their composure. Moira insisted that Bobby also had to be put out of the way. One plan failed, after which she went to Marchbolt and slipped morphia into Bobby's beer while he was asleep; he survived. Thus the murder's failure was not confined to the body's false identification. Carstairs had spoken before dying, and what he said helped redirect suspicion toward Evans and provoked a further attempt to silence Bobby. The sequence exposes the limits of the cover-up: Roger could change the photograph and remove papers, but he could not control the words Carstairs had already managed to leave behind.