Looking around cautiously, Mac Thornwald eased himself down from the window ledge where he had been crouching. It was less than a ten-foot drop, but because of the pain in his left ankle he didn't dare to drop too heavily. His right leg would have to take the brunt of the shock. As he struck the plastosteel pavement, he clamped his lips together to cut short the moan of pain that welled up as his left foot twisted under him. He staggered a little and then straightened to look around. No one had