"What about the other students? Did any of them consider this Godslayer concept to be sacrilegious?"
"Nobody ever said anything, no."
"OK. Was Kitchener working on any kind of energy generating system; like microfusion, or proton boron fusion, something new, something radical?"
Nicholas screwed his face up. "Nothing like that. He gave me a magnetosphere induction problem to solve, though."
"What's that?"
"Well, it's hardly new, but if you place a length of wire in orbit, its motion as it moves through the Earth's magnetosphere will generate an electric current. It's a simple induction principle, like a generator."
"How big a current?"
"That depends on the size of the cable, obviously."
"Yeah, right." Maybe the boy wasn't so different after all. "What I need to know, Nicholas, is are you talking about something that can power an AV player, or a city?"
"Oh. A city, definitely, or maybe a medium-sized town. Kitchener was very insistent about that. He said that we had to learn to concentrate on the practical applications of physics, abstract theory was all very well but it doesn't pay the bills. He was right, of course, he was always right. He called it his ninety-ten law. He let us study abstract theories for ninety per cent of the time, but we had to spend at least ten per cent of each week working on practical ideas. He used to set us two projects simultaneously, one of each."
"How far had you got with this magnetosphere project?"
"I hadn't done much work on it at all, I was spending most of my time on the dark-mass project. But I did confirm its basic validity. I designed a cobweb array, about two hundred and fifty kilometres across. The beauty of that is, if you give it a slight spin it will retain its shape without any additional structural material, you only need the cables themselves. I was going to work on strength of materials limits next. But…"
"I thought beaming power down from space was ecologically unsound."
Nicholas smiled vacantly. "I was going to use a superconductor cable, tethered between the Equator and geostationary orbit. That's a perfectly practical solution; the orbital tower is an idea even older than magnetosphere induction. It was originally suggested that you build it with magnetic rails and run lift capsules up and down, that way you'd never need any sort of spaceplane to get into orbit. My version was a lot simpler and cheaper, just a single strand fixed to a station that could receive power beamed to it from the induction webs, a bigger version of the communication platforms that are up there now. The superconductor would have to be held up by a monolattice filament, of course, it couldn't possibly support its own weight. It was Kitchener who suggested it as an alternative method of bringing the power down. He joked about it, he said he'd be as rich as Julia Evans if it was ever built. He gets a royalty from monolattice filament, you see. It's only a fraction of a per cent, but for a cable thirty-six thousand kilometres long, it would be a hell of a lot of money. He was really keen to see how the figures came out."
"Nicholas, how advanced is this project? I mean, could it actually be built with today's technology?"
"I don't know. It was really just a thought experiment, Kitchener tailored them to match our fields of expertise. The equations were interesting, I had to juggle so many factors, but it did look like it would come out pretty expensive. That's why I was excited about Event Horizon's new spaceplane, the way it's going to bring launch costs down. I was going to include those figures in my analysis."
"But you never got round to it?"
"No."
"Was the project stored in the Abbey's Bendix?"
"Yes, but I kept a back-up file in my terminal. It should still be there."
"Did you ever tell Randon that you were working on this idea?"
"Oh, no, I never discussed it with anybody else apart from the other students."
"So the company never really showed much interest in what you were doing at Launde?"
"They offered me the sponsorship money and a guaranteed research position, that's all. Kitchener's students have this reputation, you see. It's a bit snobby, but a lot of them have turned out to be real high-achievers."
"Yeah." Greg couldn't help thinking about Ranasfari. You couldn't get any further apart than him and Kitchener, the cold aesthetic and the glorious old debaucher. The chemistry must have been there, though; Ranasfari clearly revered his mentor. And Kitchener had spotted the potential, just like he had with Nicholas.
"It was all arranged through an agency in Cambridge," Nicholas said. "They specialize in placing graduates. I've never actually met anyone from the company itself. I was looking forward to working in France."
"Do you speak French?"
"Not very well. I've got one of those teach yourself courses on an audio memox. I'll speak it properly by the time… I mean, I would have spoken it properly by the time I finished my second year at Launde. There's only a vocabulary and syntax to memorize, that's not much of a problem for me."
"Interesting. You have a lot of confidence in your memory, don't you?"
"Yes, my recall is virtually perfect. I wasn't trying to boast," he added contritely.
"I didn't say you were."
"Kitchener said I should be proud of it. He said it was better than his."
"Have you ever had days which you can't remember? Events that are lost to you?"
Nicholas regarded him with a tinge of suspicion. "You mean like transient global amnesia?"
Greg was suddenly glad his thoughts weren't available for Nicholas to read. But he really should have known better than trying to creep up on a topic with Nicholas, especially anything remotely connected with science. "Yeah, transient global amnesia, or even trauma erasure."
"You think that's why your psi faculty didn't spot any guilt, isn't it? That I did murder Kitchener, and I just blanked it out."
"It's a possibility, Nicholas, and you know it is."
The swift heat of belligerence faded from the boy. "Yes," he said softly. "But I don't have blackouts. And I've never forgotten a day or an hour in my life."
"OK."
"I was telling the truth then, wasn't I?"
"Yes, Nicholas. You've never suffered from memory loss."
He rose to his feet, still as undecided as when he'd walked in. "I'll let you know what happens."
"Mr Mandel. Thanks."
"You're not out of it yet."
The CID office had been deluged with another wave of entropy. There were more folders and memox crystals littering the desks. Crumpled fast-food wrappers bubbled up out of the bin, waxed kelpboard trays with congealed smears of sweet and sour sauce.
The detectives formed their usual closed-ranks knot around one of the desks beside the situation screen. Greg was given some dark speculative looks as he came in. Only Amanda acknowledged him with anything approaching a smile. Vernon Langley broke away from the group, another man following him.
"Did he admit anything?" he asked.
"No."
"Christ, that kid is a smooth one. What about your esp, did you pick up any guilt waves this time?"
"No," Greg said curtly.
"Shame about that."
"Yeah."
Vernon held up his police-issue cybofax. "I asked the lab to re-run tests on the samples Beswick supplied."
"And?"
"No trace of scopolamine, or any other drug. The boy's blood chemistry is perfectly balanced."
"OK, it was just a thought."
"I asked the lab people about scopolamine. You think Beswick made himself forget the murder?"
"It's one option, because he certainly doesn't remember. There must be a reason. What about his medical records?"