Ortine said silkily, "Very well, Justin, what _do_ you believe--where I am concerned?" "I think you'd have taken off from here like a shot if it weren't for your becoming inextricably entangled with the human race through your multiple-Eve disaster. I have no idea of the effect of plural birth upon a polymorphous being but I have a hunch it is serious. I think you've got to destroy all of us to get away. Otherwise none of this makes sense." "Then why shouldn't I simply stay on?" Ortine inquired caustically. "I'll tell you why," replied Justin. "You've got to get away because we're beginning to learn too much. Sooner or later the existence of this ship of yours is going to be discovered--_you_ are going to be discovered. And when that happens, you're in the wrong galaxy and your physical weapons will be as useless as your psychological weapons are useless against an educated mind and spirit." Ortine said, "You have reared quite a structure upon a few involuntary hints, a smidgin of knowledge and a long train of intuition." He smiled ruefully, added, "I might as well confess you are remarkably close to the truth--not a bullseye but close." "Thank you for that," said Justin ironically. "You needn't feel too proud of yourself," Ortine told him. "I suppose the indications are there for anyone to read who is able to. You're right about my mission. Mine is merely an experimental flight to crash the barrier between your space and mine--incidentally, I believe, the first to do so successfully. "Unfortunately my ship emerged into this galaxy on a collision course for a planet of your system, shattering it into what you know as the asteroids. As a result of the damage it caused I was forced to moor to Earth in an effort to effect repairs. "I could not make such repairs alone--hence I was forced to develop the dominant species to a point where its members could actually do some of the heavy work. The construction needed, while minuscule in comparison to my ship, was immense in relation to men--immense and generally senseless." "The Tower of Babel," mused Justin, "and the pyramids...." "And the basalt water city of Ponape and scores of other structures whose size has always seemed to exceed the needs of their purpose," Ortine affirmed. "Call them jacks if you wish--that was their primary function. At any rate, thanks to the labor of humans, my ship has at last been readied for its return flight." "And if you should return successfully what will happen?" Ortine shrugged. "I belong to an aggressive race," he said simply. "We have already conquered one universe. Need I say more?" "And your communications are ineffective?" Justin asked. "Yes, thanks to the crash. But don't let your hopes rise too high, Justin. When my plans are complete human science and knowledge will be irreparably set back." "So you _are_ afraid of what we're beginning to learn."