Fair Used. Styles Court should have been left to John Cavendish. Instead it went to his stepmother who promptly married a fortune-hunter. When she was murdered the suspects were her family and closest friends. Fortunately, Hercule Poirot found some intriguing clues - a shattered coffee-cup, an old envelope, a fragment of fabric, a splash of candle grease - to help him solve the mysterious affair at Styles.