In 1977, a 19-month-old infant from Qatar was suffering from a mysterious illness which was caused by thallium poisoning.In 1975, Agatha Christie received a letter from a Latin American woman who had saved another woman from slow poisoning by her husband, since she recognised the symptoms of thallium poisoning through reading the novel.

For instance, in 1971, Graham Frederick Young, known as the 'Teacup Poisoner' who had poisoned several people, three fatally, was caught thanks to this book.The Pale Horse is notable among Christie's books as it is credited with having saved at least two lives after readers recognised the symptoms of thallium poisoning (the killer's main method of murder) from its description in the book, as well as inspiring several case of murder with thallium as murder weapons (inspired by Osborne's actions). Because of the public's lack of knowledge of thallium poisoning at the time, their deaths was mistaken and reported as illness and natural causes. Osborne was resposible for the death of several guests in the Pale Horse hotel, including the death of Lady Hesketh-Dubois, Mark's godmother. Venable was crippled for real due to polio, leading to Osborne's final exposure. Venable's scarred face, he was not aware from the beginning that Mr. In spite of his correct description over Mr. Venable for the crime and described to Mark, in order to drew suspicion elsewhere. While pretending to assist Mark during his investigation, Osborne later framed Mr. Mark later received the list from the police and started his investigation alongside Mrs. Davis' death, Father Gorman hid the list in his shoe and went for Scotland Yard, but was attacked and killed by Osborn, who was stalking him, in the meantime when Mark became wary of a schoolgirl dying with her hair being pulling out of her head, during a fight just a few days ago. Davis, an expelled member of the criminal organization who was also poisoned, confessed to her friend Father Gorman before her death and handed him a list of Osborne's victims to him. It should be noted that he poison Osbourne used was thallium, a fatally poisonous metal that is tasteless and have affects of making its victim having hair falling down, before the poison slowly killed them when there was a certain dose.Īt the start of the story, Mrs. He used the black magic as a piece of misdirection on his part, and committed murder via replacing products the victims had named in the CRC (Customers' Reactions Classified) survey with poisoned ones. He used the black magic element and manipulated the mediums led by Thyrza Grey to choose his victims. Zachariah Osborne was a pharmacist who ran an organized crime within the Pale Horse hotel conspiracy.

The pale horse marple