EARTH

1.

Trevize was hot and annoyed. He and Pelorat were sitting in the small dining area, having just completed their midday meal.

Pelorat said, “We’ve only been in space two days and I find myself quite comfortable, although I miss fresh air, nature, and all that. Strange! Never seemed to notice all that sort of thing when it was all around me. Still between my wafer and that remarkable computer of yours, I have my entire library with me—or all that matters, at any rate. And I don’t feel the least bit frightened of being out in space now. Astonishing!”

Trevize made a noncommittal sound. His eyes were inwardly focused.

Pelorat said gently, “I don’t mean to intrude, Golan, but I don’t really think you’re listening. Not that I’m a particularly interesting person—always been a bit of a bore, you know. Still, you seem preoccupied in another way. —Are we in trouble? Needn’t be afraid to tell me, you know. Not much I could do, I suppose, but I won’t go into panic, dear fellow.”

“In trouble?” Trevize seemed to come to his senses, frowning slightly.

“I mean the ship. It’s a new model, so I suppose there could be something wrong.” Pelorat allowed himself a small, uncertain smile.

Trevize shook his head vigorously. “Stupid of me to leave you in such uncertainty, Janov. There’s nothing wrong at all with the ship. It’s working perfectly. It’s just that I’ve been looking for a hyper-relay.”

“Ah, I see. —Except that I don’t. What is a hyper-relay?”

“Well, let me explain, Janov. I am in communication with Terminus. At least, I can be anytime I wish and Terminus can, in reverse, be in communication with us. They know the ship’s location, having observed its trajectory. Even if they had not, they could locate us by scanning nearspace for mass, which would warn them of the presence of a ship or, possibly, a meteoroid. But they could further detect an energy pattern, which would not only distinguish a ship from a meteoroid but would identify a particular ship, for no two ships make use of energy in quite the same way. In some way, our pattern remains characteristic, no matter what appliances or instruments we turn on and off. The ship may be unknown, of course, but if it is a ship whose energy pattern is on record in Terminus—as ours is—it can be identified as soon as detected.”

Pelorat said, “It seems to me, Golan, that the advance of civilization is nothing but an exercise in the limiting of privacy.”

“You may be right. Sooner or later, however, we must move through hyperspace or we will be condemned to remain within a parsec or two of Terminus for the rest of our lives. We will then be unable to engage in interstellar travel to any but the slightest degree. In passing through hyperspace, on the other hand, we undergo a discountinuity in ordinary space. We pass from here to there—and I