Elephants Can Remember
Agatha Christie
 The bodies of General Alistair Ravenscroft and his wife were found near their manor house in Overcliffe. Both had bullet wounds, and a revolver with only their fingerprints left between them. In the original investigation no one was able to prove whether the case was a double suicide or murder/suicide and, if the latter, who killed whom. Left behind are the couple's two children, including daughter Celia. Ten years later, Mrs. Ariadne Oliver, a school friend of the late Margaret Ravenscroft and godmother to her daughter, is approached at a literary luncheon by Mrs. Burton-Cox, to whose son Celia Ravenscroft is engaged. Mrs. Burton-Cox asks Mrs. Oliver what she appears to believe is a very important question: which of Celia's parents was the murderer, and which was murdered? Initially put off by the woman's attitude, after consulting with Celia herself, Mrs. Oliver agrees to try to resolve the issue. She invites her friend Hercule Poirot to solve the disquieting puzzle. Together they conduct interviews with several elderly witnesses whom they term “elephants”, based on the assumption that, like the proverbial elephants, they may have long memories . Each "elephant" remembers (or mis-remembers) a very different set of circumstances, but Poirot notes some facts that may have particular significance: Margaret Ravenscroft owned four wigs at the time of her death, and a few days before her death, she was seriously bitten by the otherwise-devoted family dog. Poirot decides that the investigation must delve deeper into the past in order to unearth the truth. He and Mrs. Oliver discover that Dolly (Dorothea) and Molly (Margaret) Preston-Grey were identical twin sisters, both of whom died within the space of a few weeks. While Molly generally led an unremarkable life, Dolly had previously been connected with two violent incidents and had spent protracted periods of her life in psychiatric nursing homes. Dolly had married a major called Jarrow and, shortly after his death in India, she was strongly suspected of drowning her infant son, something that she had tried to blame on the little boy’s Indian Ayah. A second murder was apparently committed in Malaya while Dolly was staying with the Ravenscrofts; it was an attack on the child of a neighbour. While staying again with the Ravenscrofts, this time at Overcliffe, Dolly apparently sleep-walked off a cliff and died on the evening of September 15, 1960. Molly and her husband died less than a month later, on October 3. Poirot is contacted by Desmond Burton-Cox, Celia Ravenscroft's fiancé, who gives him the names of two governesses who had served the Ravenscroft family, who he thinks may be able to explain what happened. Turning an investigative light on the Burton-Cox family, Poirot’s agent, Mr. Goby, discovers that Desmond (who knows that he is adopted, but has no details about the adoption or his origins) is the illegitimate son of a now-deceased actress, Kathleen Fenn, with whom Mrs. Burton-Cox’s husband had conducted an affair. Kathleen Fenn had left Desmond a considerable personal fortune, which would, under the terms of his will, be left to his adoptive mother were he to die. Mrs. Burton-Cox’s attempt to prevent Desmond getting married to Celia Ravenscroft is thus an unlovely attempt to obtain the use of his money (there is no suggestion that she plans to kill him and inherit the money). Poirot suspects the truth, but can substantiate it only after contacting Zélie Meauhourat, the governess employed by the Ravenscrofts at the time of their death. She returns with him from Lausanne to England, where she explains the truth to Desmond and Celia. Dolly had fatally injured Molly as part of a psychotic episode, but such was Molly’s love for her sister that she made her husband promise to protect Dolly from the police. Accordingly, Zélie and Alistair made it appear that Dolly’s was the corpse found at the foot of the cliff. Dolly took her sister’s place, playing the role of Molly to the servants. Only the Ravenscrofts’ dog knew the difference, and this is why it bit its "mistress". Ultimately, Alistair committed suicide after killing Dolly in order to prevent her from injuring anyone else. Desmond and Celia recognise the sadness of the true events, but now knowing the facts are able to face a future together.