The Abu Simbel boulder incident is an attempted killing—or, as Andrew Pennington maintains, a tragic accident—in which a massive rock hurtles down a cliff toward Linnet Doyle. Simon’s quick reaction saves her from being crushed. The episode is both a sudden physical threat and a crucial uncertainty in the investigation: Poirot later connects Pennington to the falling boulder, but the evidence presented leaves open whether he meant to cause it to fall.

The Near-Fatal Fall

As Simon sits with Linnet, he has recovered from his earlier unease and believes there is nothing to fear. A shout and the sight of someone running toward him with raised arms interrupt that calm. Simon springs up and drags Linnet with him just before a large boulder crashes past. Had she stayed where she was, the rock would have crushed her.

The danger is immediately visible in the couple’s reaction: both are white-faced and cling to one another. Hercule Poirot and Tim Allerton run up to them. Poirot notes that it was a close escape, and the group looks toward the cliff, where no one is visible. There is, however, a path along its top. Poirot remembers seeing local people walking there when they first came ashore, establishing that the cliff edge could be reached from above without identifying who, if anyone, had caused the boulder to fall.

Linnet remains dazed and bewildered after the near miss. Simon, by contrast, is speechless with rage. The immediate consequence is survival, not an explanation: the rock has passed them, but its origin and the circumstances of its fall remain unresolved.

An Accident Under Suspicion

The incident acquires investigative importance because a falling boulder could conveniently be taken for an accident. In a later conversation, Poirot tells Colonel Race that a person had narrowly escaped that kind of death the previous day. When Race asks whether the person under suspicion could have engineered it, Poirot stresses that this is precisely the difficulty: that suspect could have had nothing to do with the boulder. Race suggests that it must therefore have been an accident; Poirot accepts the possibility but says he does not like such accidents.

That exchange keeps two questions distinct. The fall is suspicious in its consequences, yet Poirot does not treat it as proof against the person whose actions elsewhere have drawn suspicion. His caution also preserves the difference between an event that looks conveniently accidental and an event whose cause has been established. The scene at the cliff supplies a real danger and an accessible path above it, not an eyewitness identification of the person responsible.

Pennington’s Role and Denial

During the later confrontation, Poirot tells Pennington that he believes Pennington dislodged the boulder while walking along the clifftop at Abu Simbel and that it narrowly missed its intended object. Pennington calls the accusation mad and denies that he tried to kill Linnet. Poirot proposes that the fall may have been a sudden temptation, on the assumption that Pennington thought nobody had seen him. Pennington instead says he stumbled and fell against the boulder, insisting that its fall was accidental.

The exchange ties the physical incident to Pennington’s financial crisis without making his intention certain. Poirot says that Linnet’s unexpected marriage brought Pennington over in haste to seek a way out of his difficulties, and that Pennington had tried, unsuccessfully, to obtain her signature on documents. Pennington later attributes his troubles to the Wall Street Crash and says he had staged a comeback that might have put matters right by the middle of June. These circumstances give Poirot a reason to suspect him, but Pennington’s account remains a denial rather than a confession of attempted murder.

Place in the Investigation

The boulder episode matters both as a failed attack on Linnet and as an ambiguous clue. Simon’s intervention prevents the rock from killing her; Poirot’s later reconstruction assigns the act of dislodging it to Pennington, while the question of deliberate intent remains contested. The path along the cliff makes human intervention possible, and the later accusation supplies a suspect, but neither detail changes the event’s immediate uncertainty into certainty.

In the larger investigation, the incident also warns against treating apparent accidents as self-explanatory. Poirot considers the possibility that a person might exploit an accident-like death, yet explicitly separates this earlier episode from the suspected involvement of another person. The boulder therefore establishes a pattern of danger around Linnet without, by itself, resolving who intended what. Its near miss saves her life at Abu Simbel and leaves behind a question that returns when Poirot confronts Pennington.