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I had no real interest in telling any of this to Van Lyle, true as it might be. I was merely stalling, postponing the moment when he would tape my mouth again and carry out the next stage of the proceedings. I had little doubt what that was going to be. Lyle hadn’t hauled me down to this processing plant, far offshore and a hundred meters beneath the surface of the sea, just to show off the advanced technology of Earth’s Food Department.

It was also a very bad sign that he had mentioned the name of Anna Griss. In the past he had always refused to admit that he worked for her.

I wondered what he was waiting for now. It shows how desperate I was feeling, but I actually hoped he might be planning another shot at raping me. Let him do anything — anything that might provide enough time for help to arrive, or give me a thin chance of resistance. That was better than being strapped in the wheelchair, able only to move my head and trunk from side to side.

I didn’t have much hope. This wasn’t my environment, it was theirs. I might have an edge in deep space, but down on Earth, Van Lyle and Anna Griss held home field advantage.

And suddenly I had no hope at all. Because I heard the steel doors at the back of the chamber open, the ones through which I had been wheeled in. There was the squeak of unoiled bearings, and a few seconds later another wheelchair was rolled alongside mine.

McAndrew sat in it, his legs and arms tied to the chair’s metal struts, not by sticky tape but by thick, knotted cords. His mouth was not covered.

He stared across at me miserably. “I’m sorry, Jeanie,” he said. “I really am. This is all my fault, every bit of it.”

I tried to smile at him, and winced at raw, stripped skin. My lips began to bleed again. “Don’t feel bad, Mac,” I mumbled. “If it’s your fault, it’s my responsibility.”

* * *

It had started at the Penrose Institute, over a month ago. I had been on the way home after a routine Europan delivery run. Orbital geometries happened to be favorable, so it was the most natural thing in the world for me to drop in on McAndrew. The Institute, after a disastrous couple of years of bureaucratic rule, was once more under the steady but informal guiding hand of old Dr. Limperis, dragged out of retirement to put things right. I wanted to see how everything was going, and renew old acquaintances.

I headed straight for Mac’s working quarters. He was not there. Instead, Emma Gowers was loafing in his favorite chair and staring at a display.

“Off in the communications center,” she said. “He’ll be back in a few minutes. You might as well wait here.” She was as blond, beautiful and blowzy as ever. And presumably as brilliant. She was the Institute’s resident expert on multiple kernel arrays.

“Is he all right?” I asked. Mac usually had to be dragged out of his own office, unless he was off somewhere running an experiment.

“Oh, he’s fine.” Emma pushed her mass of blond hair higher on her head. “But you know McAndrew. He’s got another pet project going. You can hardly talk to him any more.”

I nodded. It was the most natural thing in the world to find McAndrew in the grip of a new scientific obsession. He would be delighted to see me, I knew that. But he might also be only vaguely aware of my presence.

I sat down next to Emma. “What is it this time?”

“There’s talk of a new fundamental invariant. I’m skeptical, frankly, but he’s a believer — at least enough to want to check it out for himself.”

“Educate me, Emma. What do you mean, a fundamental invariant?”

Simple explanations were not Dr. Gowers’ forte. She frowned at me. “Oh, you know. Things that don’t change under transformation. Like the determinant of a linear system under orthogonal rotation, or the Newtonian equations of motion with a Galilean transformation, or Maxwell’s equations with a Lorentz transformation.”

It’s an odd thing about Emma Gowers. Her own taste in men is for primitive specimens, dim and hairy objects who apparently decided to stop evolving somewhere in the early Pleistocene. Yet she insisted on assuming that McAndrew and I were on the same intellectual plane, just because we were long-time intimates.

“Uh?” I wanted to say; but I was saved from new admissions of stupidity and ignorance by McAndrew’s own bustling arrival.

“Using my chair and my data banks again, Emma,” he said. “Out, out, out.” And then to me, as though we had not been separated for months, “Jeanie, this is perfect timing.”

Most people think that I tolerate behavior in McAndrew that I would never stand in any other human being, just because he’s a genius. He is that, the best combination of theorist and experimenter to arise in physics since Isaac Newton — at least, that’s what those few equipped to make the evaluation all tell me. But genius has nothing to do with my own tolerance of Mac, or his of me.

I can’t do better than to say that we click. We are very different, but we touch at just enough points to make us stick.

McAndrew puts it differently. “A hydrogen bond,” he has said to me, often enough to make it irritating. “Not an ionic bond, that’s all set and rigid, or even a covalent bond, where things are actually shared. No. We’re a hydrogen bond, loose and fluid and easy-going.”

I’ll just say that we like each other. And if he thinks I’m so dim that everything he says to me about science has to be deliberately “dumbed down,” and if I think he is so wrapped up in abstractions that he ought not to be allowed outside in the real world without a keeper — well, that’s acceptable to both of us.

This time he responded to my hug, but in an automatic and absent-minded way. “If you’re heading inward,” he went on, “as I suspect you are, then I’ll hitch a ride with you.”

The space structure that houses the Penrose Institute is mobile, and at the time of my visit it was again drifting free, well outside the orbit of Mars. But inward? Mac’s interests usually lay well beyond the edge of the Solar System.

“To Earth,” he explained. And, as my eyebrows rose, “Och, don’t worry, I’m not asking you to come with me. Drop me off at a libration point, Jeanie. That will do fine.”

He knew my aversion to Earth, overcrowded and noisy and smelly. But I had always thought that he shared it, and he and I had other good reasons to avoid going there. One of Earth’s most powerful people was Anna Griss, former head of Earth’s Food Department, and now Administrator of the full Food and Energy Council. Mac had cut off her arm with a power laser, out in the Oort cloud. It had been done with the best of intentions, and it had saved her life; but I knew Anna. She would not have forgotten, or forgiven.

As for me, I had been a target for her hatred since the same trip, perhaps even more so, because I had challenged her authority — and proved her wrong.

It’s no surprise that there are people like Anna Griss in the world. There always have been. Go back fifty thousand years, to a time when most of us were just grubbing along, looking for a decent bush of ripe berries or a fresher lump of meat. A few, like McAndrew, were busy inventing language or numbers, or painting the walls of the cave. And some, just a handful but too many in every generation, were seeking an edge over the rest of us: Water access, or mating rules, or restricted entry to heaven. No matter how few they were, Anna Griss would have been one of them.

So McAndrew knew very well what I was driving at when I stared at him and said, “Earth? Do you think that’s a good idea?”

“It’s a must,” he said. “I’m going to visit the Energy Council. To be specific, I’m going to the laboratory of Ernesto Kugel, where there is evidence that something wonderful has been discovered: a new Invariant of Nature.”