Unfortunately for Blore, Armstrong, and Lombard, mutual suspicion compromises their alliance, as each man suspects that one of the others is the killer. We can already see this suspicion developing during their search of the island, when Blore asks Armstrong why Lombard happens to be carrying a revolver. Blore’s mistrust of Lombard grows as the novel progresses, and it comes out into the open once they are the only two men left alive. But, as Vera points out later, Lombard’s personality—he is a man of action primarily interested in saving his own life—makes him totally wrong for the part of a murderer whose primary goal seems to be the delivery of cosmic justice. But Blore does not consider this idea, because his policeman’s mind is limited. Blore’s folly is another example of how Christie subverts the conventions of the detective story. The former policeman is the closest thing to a detective on the island, yet, unlike an almost omniscient, Sherlock Holmes–style sleuth, Blore never manages to get things right.