She took him by the hand and led him deeper into the park. During the year he had been an unofficial member of the underground, supplying them with blueprints, he had never seen their headquarters, but he suspected it was close by, right under the noses of the authorities, and Julie did not disappoint him. She led him to a stone-block monument commemorating heroes of the Last War, and effortlessly pushed aside one of the blocks to reveal the darkness of a tunnel. "Follow me," she directed and disappeared. Arthur did, but first he dropped the silver disc a few feet away. When they were in the tunnel, Julie closed the entrance again and produced a flashlight. By its beams, they made their way downward. They walked for perhaps a half-mile, when the tunnel broadened into what seemed a cavern. Their footsteps echoed from the opposite wall with a click-click-click, click-click-click. "The old subway," Julie explained, her voice hollow, and Arthur nodded. With the coming of the helibus system many years ago, the subways had been discarded and their entrances sealed and checked periodically. Of course, they couldn't know about the monument entrance. At least, they hadn't, Arthur amended, thinking of the silver disc whose emanations could now be easily picked up by the robots. "Here we are," Julie said, after awhile, coming to a halt before a door. She tapped carefully with the flashlight according to a prearranged signal. The door slid open slightly, emitting a finger of light from the room's glowtube. A man's face appeared to survey the corridor briefly, then the door went wide. They entered a large room and the door slid into place behind them. Arthur strained his eyes, blinded temporarily by the light. Unfamiliar faces stared at him, about twenty of them. Men and women of all ages. He started suddenly. There, grinning pleasantly at him, was Austen, the young fellow from the office. "Are we all here?" Julie wanted to know. "Yes, we were waiting for you," a voice said. Arthur whirled. "You?" "Everything okay, Dunlop?" Samson asked, smiling. "Simply great," he answered, a little weakly. "What kept you?" Samson asked Julie. "_He_ was delayed by a robot." "What?" Austen was at the door, frowning. "I thought I heard a noise." His voice was a whisper. Samson pulled out a gun. He glared at Dunlop. "If they followed you--" The door gave way with a sudden blast that threw them all to the floor. In the smoking entrance a robot appeared. With an effort, Samson forced himself erect and leveled his blaster. Before he could fire, Arthur leaped at the man, wrenched the weapon from his fingers. Then the robot was in the room, then another, and another, their forehead-rays ready for instant use. There was no escape. "Arthur!" Julie cried hoarsely. "_There's_ your WBI man," Samson accused. Arthur smiled crookedly and held on to the blaster in his hand. He did not look at Julie, for there was silent contempt and shame in her eyes.