When interviewing Louise in the cabin in which Simon is resting, Poirot notes an oddness in the words she uses. Miss Bowers returns Linnet's pearl necklace, which was stolen by Miss Van Schuyler, a kleptomaniac. However, Poirot realizes it is merely an imitation of Linnet's real necklace. He notes two bottles of nail polish in the victim's room, one of which intrigues him. Louise is then found stabbed to death in her cabin. Mrs. Otterbourne later meets with Poirot and Race in Simon's cabin, claiming she saw who killed the maid, to which Simon loudly declares his surprise. Before she can reveal who it is, she is shot dead from outside the cabin. Poirot soon confronts Pennington over his attempted murder of Linnet by pushing the boulder off the cliff – Pennington had speculated unsuccessfully with her inheritance, and came to Egypt upon learning of her marriage to Simon to trick her into signing documents that would exonerate him. However, he claims he did not murder anyone, despite his revolver having been used in Mrs. Otterbourne's murder. Poirot recovers Linnet's genuine pearls from Tim, who had substituted an imitation string of pearls for the real necklace. Race realizes Richetti is the man he is looking for.