MacWhirter’s fabricated testimony about seeing someone on the rope

Angus MacWhirter’s fabricated testimony about seeing someone on the rope is a deliberate substitution of claimed eyewitness knowledge for deduction. Asked by Superintendent Battle to repeat his account, MacWhirter describes a man climbing from the sea on a rope hanging from a window at Gull’s Point. Only later does he disclose that he did not see this: he had worked out what might have happened from other evidence, and his account of the sighting was false. The change from apparent witness to admitted fabricator makes the rope not just a clue, but a test of how evidence becomes a story—and of what can happen when an inference is presented as fact.

The account presented to Battle

Battle asks MacWhirter to repeat what he had told him at the house. MacWhirter begins with a true part of his history: he had been rescued from a cliff the preceding January and wanted to revisit the scene. He then places himself at Stark Head on Monday night, at approximately eleven o’clock, looking across at the house he now knows as Gull’s Point. In this version, he sees a rope hanging from a window into the sea and a man climbing up it.

The account is economical and confident. MacWhirter speaks in short sentences, and the precision of the supposed observation gives Battle’s listeners a vivid route into the house: from the water, up a rope, through a window. But its apparent clarity also gives it force it has not earned. At this stage, those listening are being asked to accept a claimed sighting, not merely a theory about how someone could have entered.

Mary Aldin immediately draws the wrong conclusion from the account, exclaiming that the intruder must have been an outsider and an ordinary burglar. Battle checks that leap. The person could have swum across from the other side of the river, he says, but someone in the house would have had to prepare the rope. The possibility of an outsider therefore does not clear the household: it implies an accomplice inside. Battle connects that inference to someone who was not seen between half past ten and a quarter past eleven and might have crossed the water with help from this side, then turns the question toward Ted Latimer.

From sighting to deduction

The revelation reverses the status of MacWhirter’s story. When asked whether he has remembered the man on the rope, he pauses and admits that he did not actually see anyone climbing. He had been at Stark Head on Sunday night, not Monday. The supposed Monday-night sighting is thus not a mistaken detail within an otherwise witnessed scene; it is the false frame around an inference.

MacWhirter says that he deduced what must have happened from evidence of the suit, and that his suppositions were confirmed when a wet rope was found in the attic. The distinction matters. The rope’s presence is a concrete finding, while the man climbing it is something MacWhirter says he inferred. His deduction may point toward a plausible reconstruction, but it cannot honestly be reported as something he watched. The wet rope supports a route through the house; it does not turn a remembered sighting into a real one.

Audrey Strange’s response registers the personal shock of the disclosure: she turns from red to white and asks whether the whole story was a lie. MacWhirter answers that deductions would not have carried weight with the police, so he had to say he had seen what happened. His explanation makes the falsehood instrumental. He has not simply misstated where he stood; he has changed the kind of evidence he claims to possess, replacing an argument that investigators might assess with testimony that purports to settle the matter by direct observation.

The risk of sworn testimony

Audrey identifies the further consequence. MacWhirter might have had to swear to the story at her trial. He acknowledges that he might. The admission therefore reaches beyond the immediate conversation: a fabricated sighting could have entered legal proceedings as testimony under oath, with consequences for a person whose case depended on the interpretation of the evidence. His account would not merely have helped explain the rope; it could have made a conjecture appear to be witnessed fact.

The surrounding investigation underscores why that distinction is important. A doctor says that a heavy niblick could have caused the blow, but cannot swear that it was the weapon. Nevile Strange’s fingerprints are found on the club, and Battle presses him on evidence that he was its last handler. Yet the discovery that Lady Tressilian rang for her maid after Nevile had left, and that Barrett saw her alive and well afterward, changes how the timing of events must be understood. In each instance, a clue has to be weighed for what it establishes and what it merely suggests. MacWhirter’s claim breaks that boundary by dressing an inference as direct perception.

Significance in the investigation

MacWhirter’s correction does not erase the rope or the possibility that someone used it. Instead, it forces a separation between the physical clue and the witness’s account of it. The rope found wet in the attic remains evidence; the supposed Monday-night observation does not. By admitting that his presence at Stark Head belonged to Sunday and that he could not have seen the climber, MacWhirter exposes how a plausible reconstruction can be made deceptively persuasive through invented first-hand detail.

The episode also complicates the apparent solution Battle draws from the story. The possibility of a swimmer from across the river and assistance from inside the house is a deduction built from circumstances, not a fact established by MacWhirter’s eyes. His false testimony initially seems to furnish the missing scene, but its collapse makes the investigative method visible: accounts must be tested against dates, locations, physical findings, and what a witness could actually have observed. The confession’s decisive revelation is therefore not that the rope was imaginary, but that the most vivid description of its use was never an eyewitness account at all.