Some slow process of judgment having blossomed in his mind, he turned over the object to press a small stud. The plates of the "belly" parted. From a recess there, he fumbled out a miniature accessory that fitted easily in the palm of his hand. This was round, about an inch thick, and might have been made of black plastic. The man's lips twitched in a tired smile as he hefted it pensively. Without moving from his kneeling position, he thumbed a nearly concealed switch on the edge of the disk. Within seconds, the thing began to put forth music, a diminutive reproduction of the sound of a full orchestra. The man gradually raised his hand until he held the little player to his ear. His expression remained uncomprehending. He lowered his hand, shrugging slightly, and turned off the music. Once more, he forced himself laboriously to his feet. Leaving his other belongings on the floor without a backward glance, he strode to the door with the pace of a man who has just walked five or ten miles. His long legs carried him across the distance in only a few steps, but there was a slowness, a heaviness, in their motion that revealed a deep weariness. He raised one foot just high enough to step through the opening into the corridor. Outside, he turned left and walked along at the same pace, passing several other doors at irregular intervals. That they may have led to other rooms with other occupants seemed to interest him not at all. He neither glanced aside nor paused until he came face to face with a barrier, a wall blocking his path. It was the first doorway that sported a door, and the latter was closed. It looked to be made of a plastic substance, darker than the ivory walls among which he had thus far moved, but smoother. There was a grilled opening more or less centered, but no other markings. Nevertheless, the blond man seemed to know where the portal would be fastened. He ran the tips of his fingers along one curved side, as if judging a distance. Juggling the black disk in his hand until the grip suited him better, he pressed a second switch, which was concealed at the center of the object. A thin jet of flame, so white that it far outshone the lighting of the corridor, flared against the edge of the door. He moved the flame along the edge for about two feet. Then he snapped it out and waited with his eyes blinking painfully. The corridor lighting had been revealed to be yellow and dim. Having rested, the man took a deep breath and shoved with his left shoulder against the elliptical door. It slipped off whatever had been holding it at the opposite edge and fell into the hallway beyond the bulkhead. He had neatly cut through two hinges on the other side.