Dumb Witness is a detective fiction novel by British writer Agatha Christie, first published in the UK by the Collins Crime Club on July 5 1937 and in the US by Dodd, Mead and Company later in the same year under the title of Poirot Loses a Client . The UK edition retailed at seven shillings and sixpence  and the US edition at $2.00.The book features the Belgian detective Hercule Poirot and is the second to last Poirot novel (the last being 1975's Curtain: Poirot's Last Case) to be published that features Hastings as narrator.Dumb Witness was based on a short story entitled The Incident of the Dog's Ball. This short story was lost for many years but found by the authoress' daughter in a crate of her personal effects, in 2004.The Incident of the Dog's Ball was published in Britain in September 2009 in John Curran's Agatha Christie's Secret Notebooks: Fifty Years Of Mysteries. The short story was also published by The Strand Magazine in their tenth anniversary issue.

About the Author

Dame Agatha Mary Clarissa Christie DBE  was a British crime writer of novels, short stories, and plays. She also wrote romances under the name Mary Westmacott, but she is best remembered for her 66 detective novels and 14 short story collections (especially those featuring Hercule Poirot or Miss Jane Marple), and her successful West End plays.According to the Guinness Book of World Records, Christie is the best-selling novelist of all time. Her novels have sold roughly four billion copies, and her estate claims that her works rank third, after those of William Shakespeare and the Bible, as the most widely published books. According to Index Translationum, Christie is the most translated individual author, with only the collective corporate works of Walt Disney Productions surpassing her. Her books have been translated into at least 103 languages.

Book Plot

Emily Arundell writes to Hercule Poirot because she believes she has been the victim of attempted murder. However, unfortunately this letter is delayed and when Poirot receives it, she has been dead for some time. Her doctor, who has lost his sense of smell, says that she died of liver problems she had had for many years.Emily's companion Miss Lawson is the unexpected beneficiary of a substantial fortune, according to a very recent change of will. Under the previous will, Emily's nephew Charles Arundell and nieces Theresa Arundell and Bella Tanios would have inherited. This gives them all motive for murder, because it is unclear who knew of the changed will.While examining the house, under a pretence of buying it, Poirot discovers a nail covered with varnish and a small string tied to it.