It had been eleven years since Jerry had walked across the campus of Clifton University, heading for the ivy-choked main building. It was remarkable how little had changed, but the students seemed incredibly young. He was winded by the time he asked the pretty girl at the desk where Professor Martin Coltz could be located. "Professor Coltz?" She stuck a pencil to her mouth. "Well, I guess he'd be in the Holland Laboratory about now." "Holland Laboratory? What's that?" "Oh, I guess that was after your time, wasn't it?" Jerry felt decrepit, but managed to say: "It must be something new since I was here. Where is this place?" He followed her directions, and located a fresh-painted building three hundred yards from the men's dorm. He met a student at the door, who told him that Professor Coltz would be found in the physics department. The room was empty when Jerry entered, except for the single stooped figure vigorously erasing a blackboard. He turned when the door opened. If the students looked younger, Professor Coltz was far older than Jerry remembered. He was a tall man, with an unruly confusion of straight gray hair. He blinked when Jerry said: "Hello, Professor. Do you remember me? Jerry Bridges?" "Of course! I thought of you only yesterday, when I saw your name in the papers--" They sat at facing student desks, and chatted about old times. But Jerry was impatient to get to the point of his visit, and he blurted out: "Professor Coltz, something's been bothering me. It bothered me from the moment I heard the Delegate speak. I didn't know what it was until last night, when I dug out my old college notebooks. Thank God I kept them." Coltz's eyes were suddenly hooded. "What do you mean, Jerry?" "There was something about the Robot's speech that sounded familiar--I could have sworn I'd heard some of the words before. I couldn't prove anything until I checked my old notes, and here's what I found." He dug into his coat pocket and produced a sheet of paper. He unfolded it and read aloud. "'It's my belief that peace is the responsibility of individuals, of nations, and someday, even of worlds ...' Sound familiar, Professor?" Coltz shifted uncomfortably. "I don't recall every silly thing I said, Jerry." "But it's an interesting coincidence, isn't it, Professor? These very words were spoken by the Delegate from Venus." "A coincidence--" "Is it? But I also remember your interest in robotics. I'll never forget that mechanical homing pigeon you constructed. And you've probably learned much more these past eleven years." "What are you driving at, Jerry?"