PART 1     London. A lone flashlight pierced the inky darkness. At one point, the white ray revealed a wax caveman dragging his mate toward a cave by her hair; at another, a man trapped under a large board with iron weights and stones being placed on top by a hooded executioner. These displays could be seen with ease during the museum’s regular hours of operation, but this guest didn’t even pay the entry fee. Finally, the stranger found a glass case, with red velvet bedding