The Adventure of the King of Clubs — Agatha Christie

The Oglander family was playing bridge in the drawing room of their house in Streatham last night when the French windows burst open and a woman staggered in, blood on her dress. She managed to say, "Murder " and then collapsed. The family fetched both a doctor and the police who called at the next-door villa to find the body of Henry Reedburn, the theatrical impresario, dead in the library with his skull split open by some unknown weapon. The woman is identified as the famous dancer, Valerie Saintclair.