The King of Clubs: A Hercule Poirot Short Story

Hercule Poirot is asked by Prince Paul of Maurania to solve the murder of Henry Reedburn, which has greatly distressed the Prince's fiancée, the famous dancer Valerie Saintclair. The only other witnesses seem to be a family of four who were playing bridge near an open window when she staggered in, crying ''Murder!''