The Mysterious Affair at Styles': A destroyed will, a shattered coffee cup, a splash of candle grease, a newly planted bed of begonias.... Such were the seemingly unrelated details surrounding the murder of wealthy Mrs Inglethorp, mistress of Styles Court. Yet to the meticulous Hercule Poirot, these details were the beginning of his first, and perhaps most fascinating, investigation. 'Peril at End House': A heavy picture falls across Miss Buckley's bed; a boulder thunders past her on the cliff path; car brakes fail on a steep hill, and a bullet misses her head by inches. But at last the unknown attacker has made a fatal error - Hercule Poirot is on the scene, a witness. 'One, Two, Buckle My Shoe': In the dentist's chair, his mouth stuffed with cotton wool, Hercule Poirot is for once unable to speak! At half past eleven Poirot steped out, a free man. But before lunch time sudden death had claimed a victim