The narrative unfolds with the discovery of a body in a ditch by a shepherd in a small town. The deceased is identified as Cyrus Pedley, a man of forty-three, whose death is ruled as drowning by the coroner. Witnesses, including a police sergeant and a doctor, provide evidence that suggests no signs of struggle or intoxication, leading to speculation about suicide. However, Pedley's brother, Wilfred, insists that his brother would not have taken his own life, especially given the financial implications of his life insurance policy. As the investigation progresses, Dr. John Thorndyke, a forensic expert, becomes involved, representing Wilfred Pedley. Thorndyke is skeptical of the suicide theory and believes there are deeper mysteries surrounding the case. He examines the evidence, including the body and the circumstances of its discovery, and notes inconsistencies, particularly regarding the type of duck-weed found in the ditch where Pedley was discovered. Thorndyke's investigation leads him to a factory in Essex, where he suspects Pedley may have been murdered. He discovers that Pedley had traveled to the area shortly before his death, and through careful observation, he deduces that the body was moved post-mortem to the ditch where it was found. The absence of certain key items, like Pedley's keys, raises further suspicions. The narrative reveals that Pedley was likely involved in secretive work for the Foreign Office, possibly uncovering illicit activities at the factory. Thorndyke's meticulous examination of the evidence, including the type of duck-weed and the dental plate found later, supports the theory of homicide rather than suicide. The investigation culminates in the identification of the factory as a front for a revolutionary group, leading to the arrest of the perpetrators. Ultimately, the case illustrates the importance of forensic science and attention to detail in solving crimes, as Thorndyke's insights and observations unravel a complex web of deceit and murder, bringing justice for Cyrus Pedley.
By R. Austin Freeman · First published 1912 · Genre: Mystery, Detective Fiction, Thriller