Synopsis
The story is set in Berkshire and centers on Emily Arundell, a woman of a considerable fortune who is surrounded by grasping young relatives. She is injured by falling down a staircase, and everyone believes that she tripped over a ball left by her pet fox terrier, Bob. Emily later dies of natural causes (or so it is believed), and her estate is unexpectedly left to her companion, Miss Lawson. A letter written before her death to Hercule Poirot is too late to save her life, but it puts Poirot on the trail of a murderer.
Read more about this topic: Dumb Witness