"Did you tell him Diane's here?"

"I thought it would be wiser not to." She looked at me. "I didn't tell him you're here, either. I know Jason and E.D. were at odds. Jason came home to escape something that was happening at Perihelion, something that frightened him. And I assume it's connected somehow with the Martian drug. No, Tyler, don't explain it to me—I don't care to hear and I probably wouldn't understand. But I thought it would be better if E.D. didn't come bulling out to the house, trying to take charge of things."

"He didn't ask about her?"

"No, not about Diane. One odd thing, though. He asked me to make sure that Jason… well, that Jason's body is preserved. He asked a lot of questions about that. I told him I'd made arrangements, there would be a funeral, I'd let him know. But he didn't want to leave it at that. He wants an autopsy. But I got stubborn." She regarded me coolly. "Why would he want an autopsy, Tyler?"

"I don't know," I said.

But I set about finding out. I went to Jason's room, where his empty bed had been stripped of sheets. I opened the window and sat in the chair next to the dresser and looked at what he'd left behind.

Jason had asked me to record his final insights into the nature of the Hypotheticals and their manipulation of the Earth. He had also asked me to include a copy of that recording in each of a dozen or so fat padded envelopes, stamped and addressed for mailing if and when mail service was restored. Clearly Jase had not expected to produce such a monologue when he arrived at the Big House a few days before the end of the Spin. Some other crisis had been dogging him. His deathbed testament was a late addendum.

I leafed through the envelopes. They were addressed, in Jason's hand, to names I didn't recognize. No, correct that; I did recognize the name on one of the envelopes.

It was mine.

Dear Tyler,

I know I've burdened you unconscionably in the past. I'm afraid I'm about to burden you again, and this time the stakes are considerably higher. Let me explain. And I'm sorry if this seems abrupt, but I'm in a hurry, for reasons that will become clear.

Recent episodes of what the media call "the flicker" have set off alarm bells in the Lomax administration. So have several other events, less well publicized. I'll cite just one example: since the death of Wun Ngo Wen, tissue samples taken from his organs have been under study at the Animal Disease Center on Plum Island, the same facility where he was quarantined when he arrived on Earth. Martian biotechnology is subtle, but modern forensics is stubborn. It recently became clear that Wun's physiology, particularly his nervous system, had been altered in ways even more radical than the "Fourth Age" procedure outlined in his archives. For this and other reasons, Lomax and his people have begun to smell a rat. They invited E.D. out of his reluctant retirement and they're giving new credence to his suspicions about Wun's motives. E.D. welcomed this as an opportunity to reclaim Perihelion (and his own reputation), and he's wasting no time capitalizing on the paranoia in the White House.

How have the authorities chosen to proceed? Crudely. Lomax (or his advisors) conceived a plan to raid the existing facilities at Perihelion and seize whatever we had retained of Wun's possessions and documents, as well as all our records and working notes.

E.D. hasn't yet connected the dots between my recovery from AMS and Wun's pharmaceuticals; or, if he has, he's kept it to himself. Or so I prefer to believe. Because if I fall into the hands of the security services the first thing they'll do is a blood assay, rapidly followed by making me a captive science experiment, probably in Wun's old cell at Plum Island. And I don't believe E.D. actually wants that to happen. As much as he may resent me for "stealing Perihelion" or collaborating with Wun Ngo Wen, he's still my father.

But don't worry. Even though E.D. is very much back in the loop at Lomax's White House, I have resources of my own. I've been cultivating them. These are generally not powerful people, though some are powerful in their own way, but bright and decent individuals who choose to take a longer view of human destiny, and thanks to them I was warned in advance of the raid on Perihelion. I've effected my escape. Now I'm a fugitive.

You, Tyler, are merely a suspected accessory, though it may come to the same thing.

I'm sorry. I know I bear some responsibility for putting you in this position. Someday I'll apologize face-to-face. For now all I can offer is advice.

The digital records I put into your hands when you left Perihelion are, of course, highly classified redactions from the archives of Wun Ngo Wen. For all I know you may have burned them, buried them, or tossed them into the Pacific Ocean. No matter. Years designing spacecraft taught me the virtue of redundancy. I've parceled out Wun's contraband wisdom to dozens of people in this country and across the world. It hasn't been posted on the Internet yet—no one is that feckless—but it's out there. This is no doubt a profoundly unpatriotic and certainly criminal act. If I'm captured I'll be accused of treason. In the meantime I'm making the most of it.

But I don't believe knowledge of this kind (which includes protocols for human modifications that can cure grave diseases, among other things, and I should know) ought to be corralled for national advantage, even if releasing it poses other problems.

Lomax and his tame Congress clearly disagree. So I'm dispersing the last fragments of the archive and making myself scarce. I'm going into hiding. You might want to do the same. In fact you may have to. Everyone at the old Perihelion, anyone who was close to me, is bound to fall under federal scrutiny sooner or later.

Or, contrarily, you may wish to drop in at the nearest FBI office and hand over the contents of this envelope. If that's what you think is best, follow your conscience; I won't blame you, though I don't guarantee the outcome. My experience with the Lomax administration suggests that the truth will not, in fact, set you free.

In any case, I regret putting you in a difficult position. It isn't fair. It's too much to ask of a friend, and I have always been proud to call you my friend.

Maybe E.D. was right about one thing. Our generation has struggled for thirty years to recover what the Spin stole from us that October night. But we can't. There's nothing in this evolving universe to hold on to, and nothing to be gained by trying. If I learned anything from my "Fourthness," that's it. We're as ephemeral as raindrops. We all fall, and we all land somewhere.

Fall freely, Tyler. Use the enclosed documents if you need them. They were expensive but they're absolutely reliable. (It's good to have friends in high places!)

The "enclosed documents" were, in essence, a suite of spare identities: passports, Homeland Security ID cards, driver's licenses, birth certificates, Social Security numbers, even med-school diplomas, all bearing my description but none bearing my correct name.

* * * * *

Diane's recovery continued. Her pulse strengthened and her lungs cleared, although she was still febrile. The Martian drug was doing its work, rebuilding her from the inside out, editing and amending her DNA in subtle ways.

As her health improved she began to ask cautious questions—about the sun, about Pastor Dan, about the trip from Arizona to the Big House. Because of her intermittent fever, the answers I gave her didn't always stick. She asked me more than once what had happened to Simon. If she was lucid I told her about the red calf and the return of the stars; if she was groggy I just told her Simon was "somewhere else" and that I'd be looking after her a while longer. Neither of these answers—the true or the half-true—seemed to satisfy her.