Three Act TragedyA dinner party thrown by theatre actor Sir Charles Cartwright at his home in Cornwall ends in tragedy Thirteen guests arrived at dinner at the actors house. It was to be a particularly unlucky evening for the mild mannered Reverend Stephen Babbington, who choked on his cocktail, went into convulsions and died. But when his martini glass was sent for chemical analysis, there was no trace of poison just as Poirot had predicted. Even more troubling for