is challenged to a game by an American champion. Mr Templeton. An older gentleman whose nurse suspects that he is being poisoned. Poirot realises that his son is actually Number Four. Jonathan Whalley. Another victim of the Big Four. He is murdered in his own residence, Granite Bungalow in the village of Hoppaton, Devon. He had written to John Ingles, requesting money to escape from the Big Four. Gilmour Wilson. A youthful American chess champion. He challenged Dr Savaronoff to a game and died while playing. Analysis Jerry Speir points out that the novel departs from the formula of the Hercule Poirot series. The novel is not set in the manor house or a rural area like a number of its predecessors, nor do the characters represent the British gentry. The villains are a gang of international criminals, controlling a secret, global organization. Their goals include the so-called disintegration of human civilization. They control an unspecified "scientific force", a weapon of some kind. Speir speculates that they could hold the secrets to gravity or nuclear power. Armin Risi agrees that this was to be the great case of Poirot's life, as the character himself claims that all other cases will seem tame by comparison. Poirot does not track down a murderer; he must face and expose a supranational association of high-ranking personalities who are working towards world domination. Risi sees the book as a work of secret history which was inspired by the events and causes of World War I and the October Revolution (the novel was presumably written in 1924 or 1925; see the biographical remark below). The basic scenario of the novel has secret powers (the Four) influencing humanity and the course of history. To Risi it seems to be Agatha Christie's warning about real-life organizations doing the same. He points out that Christie herself may not have been an objective historian. She was a member of the high society in the British Empire. But this fact possibly gave her access to first-hand observers of world politics and the secret affairs behind them. During the interwar period, World War I and the October Revolution were still significant topics of conversation. He theorizes that Christie may have learned of organizations of conspirators active in the era, at least those active in the City of London. There were already rumors that secret forces were planning World War II or even