An innocent masked-ball party in the touristy town of Cluny turns into a puzzling scene of crime with two of the guests being found dead in a locked room Excerpt: "Anthony " Vivian Young made a laughing surprised clutch at a tall figure stalking ahead of her down the station platform. The man turned sharply. At the sight of his fianc e he smiled pleasantly, though a sharp observer would have said that there was something in his eyes that suggested...