The Diamond Doll

"…Keeping his pistol ready, Lavrov moved closer to an opening in the wall where the unknown person had disappeared a couple of minutes earlier. His trained vision, hearing, and touch—based on special methods—caught even the slightest sign of an intruder’s presence within twenty to thirty seconds. But the intruder, most likely, had hurried away somewhere through the maze of rooms. Andrew’s instincts gave not the slightest alarm signal. Almost silently, he entered a tall, spacious hall littered with debris, with soot-darkened walls…"