'Right behind you,' he added. 'That's why you can't turn round at once—it would be much too obvious.' Laura played the oldest trick in the world and dropped her napkin, then bent to scrabble for it under her feet, sending a shooting glance over her left shoulder as she straightened once again. She sucked in her cheeks, the first tell-tale sign of suppressed hysteria, and lowered her head. 'They're not old girls at all,' she said. 'They're male twins in drag.' Her voice broke ominously, the prelude to uncontrolled laughter, and John quickly poured some more chianti into her glass. 'Pretend to choke,' he said, 'then they won't notice. You know what it is—they're criminals doing the sights of Europe, changing sex at each stop. Twin sisters here on Torcello. Twin brothers tomorrow in Venice, or even tonight, parading arm-in-arm across the Piazza San Marco. Just a matter of switching clothes and wigs.' 'Jewel thieves or murderers?' asked Laura.
