Sleeping Murder
Agatha Christie
 "Let sleeping murder lie": this is the proverb (a variation on "Let sleeping dogs lie") which is not obeyed by twenty-one year old New Zealander Gwenda Reed (née Halliday), who has recently married and now comes to England to settle down there. She believes that her father took her directly from India to New Zealand when she was a two year-old girl and that she has never been in England before. While her husband Giles is still abroad on business, she drives around the countryside looking for a suitable house. She finds an old house in the small seaside resort of Dillmouth, in Devon, which instantly appeals to her, and she buys it. After moving in, Gwenda begins to believe that she must be psychic, as she seems to know things about the house which she could not possibly know: the location of a connecting door that had been walled over, the pattern of a previous wallpaper, a set of steps in the garden that are not where they should be, and so on. Becoming increasingly uneasy, she accepts an invitation to stay for a few days in London with Miss Marple's somewhat pretentious nephew Raymond West and his wife Joan (who appear also in other stories with Miss Marple). Miss Marple's interest is piqued when, at a performance of John Webster's The Duchess of Malfi, Gwenda screams and flees the theatre &mdash; for no reason that even she understands &mdash; when she hears the actor speaking the famous line, "Cover her face; mine eyes dazzle; she died young." Gwenda tells Miss Marple later that as she heard those words, she felt she was looking down through the banisters at the dead, blue face of someone named Helen, strangled by a man uttering the same line. She insists that she does not know anyone named Helen, and she believes she is going mad. Miss Marple suggests that she may be remembering something she witnessed as a small child (looking through rather than over the banisters), and that it may have happened in the house she has just bought, despite her belief that she has never been in England before. The Reeds and Miss Marple do a bit of research, and they discover that Gwenda is not psychic at all, but in fact she did spend a year during early childhood in the house she was later to buy. Her young stepmother, Helen, disappeared, having presumably run off with a man. Her father, devastated by his wife's disappearance and convinced he murdered her, sent Gwenda to New Zealand to be raised by an aunt and died soon afterward in an asylum. The young couple realize that there may be an unsolved crime to investigate. Miss Marple, who first advises the young couple to "let sleeping murder lie", later suggests to her own doctor that he prescribe her some sea air, and she travels to Dillmouth. The investigation that now sets in is completely in the hands of amateurs: Giles and Gwenda Reed and Miss Marple. The police are absent, as it has not even been established that a crime has been committed; officially, Helen Halliday ran off with one of her lovers and either died sometime later or made a clean break with her brother and never contacted anyone at home. The amateur sleuths find two old gardeners who remember the Halliday family and some of the former household staff. The young couple talk to many witnesses, including Dr Kennedy, Helen's much older half-brother, who seems still heartbroken over the disappearance of his wild younger sister. He presents two letters posted abroad which he says he got from his half-sister after her disappearance, and which seem to prove that she did not die that night. But the amateur detectives still believe that Gwenda's memory is fundamentally reliable, and that Helen was murdered. It is later revealed that Dr Kennedy forged the two letters. The three other men in Helen's life at the time of her disappearance were Walter Fane, a local lawyer; JJ Afflick, a local tour guide; and Richard Erskine, who resides in the far north of England. It seems very likely to Giles and Gwenda that one of them must be the murderer: they were all "on the spot" when Helen disappeared eighteen years earlier. When Lily Kimble, who used to be in Halliday's employ, reads an advertisement, placed by Gwenda, seeking information about Helen, she senses there could be money in it; and after a second advertisement appears looking for her personally, she writes to Dr Kennedy asking for his advice. Kennedy interprets her letter to him as a blackmail attempt. He writes back to her, inviting her to see him at his house and including a train timetable and exact instructions on how to get to his house. He misdirects her to a deserted stretch of woodland, where he meets and strangles her. He then replaces his original letter with a fake one and is back at his house in time to "wait", together with Giles and Gwenda Reed, for her arrival. When Lily Kimble's body is found, the police start investigating. (When the police inspector sees Miss Marple he comments on a case of poison pen near Lymstock; thus Sleeping Murder is set after the happenings in The Moving Finger, which was published in 1942.) Now it dawns upon the Reeds that with a murderer still at large, their lives are in danger. This proves true: after Dr Kennedy unsuccessfully tries to poison them (it is Mrs Cocker, the cook, who takes a sip of the poisoned brandy instead and who consequently has to be hospitalised), Dr Kennedy tries to strangle Gwenda when she is alone in the house. But Miss Marple has foreseen this: she remained hidden in the garden, and when Gwenda screams she runs upstairs and disables Dr Kennedy by spraying soapy liquid into his eyes. Miss Marple explains that she believes that Helen was an ordinary, decent young woman, trying to escape from Kennedy, who was unhealthily and pathologically obsessed with her, and that the only evidence of her being "man-mad" came from him. He strangled her to prevent her moving to Norfolk in the east of England to live an ordinary, happy life away from him with her husband.