Now, even that was denied him. Sarasti's orders had severed him from his own sensorium. He no longer felt the data in his gut; he had to interpret it, step by laborious step, through screens and graphs that reduced perception to flat empty shorthand. Here was a system traumatized by multiple amputations. Here was a system with its eyes and ears and tongue cut out, forced to stumble and feel its way around things it had once inhabited, right down in the bone. Suddenly there was nowhere else to hide, and all those far-flung pieces of Robert Cunningham tumbled back into his flesh where I could see them at last.

It had been my mistake, all along. I'd been so focused on modelling other systems that I'd forgotten about the one doing the modelling. Bad eyes are only one bane of clear vision: bad assumptions can be just as blinding, and it wasn't enough to imagine I was Robert Cunningham.

I had to imagine I was Siri Keeton as well.

Of course, that only raises another question. If my guess about Cunningham was right, why did my tricks work on Isaac Szpindel? He was every bit as discontinuous as his replacement.

I didn't think about it much at the time. Szpindel was gone but the thing that had killed him was still there, hanging right off the bow, a vast swelling enigma that might choose to squash us at any instant. I was more than a little preoccupied.

Now, though—far too late to do anything about it—I think I might know the answer.

Maybe my tricks didn't work on Isaac either, not really. Maybe he saw through my manipulations as easily as Cunningham did. But maybe he just didn't care. Maybe I could read him because he let me. Which would mean— I can't find another explanation that fits— that he just liked me, regardless.

I think that might have made him a friend.

Night shift. Not a creature was stirring.

Not in Theseus, anyway. The Gang hid in their tent. The transient lurked weightless and silent below the surface. Bates was in the bridge— she more or less lived up there now, vigilant and conscientious, nested in camera angles and tactical overlays. There was nowhere she could turn without seeing some aspect of the cipher off our starboard bow. She did what good she could, for the good it would do.

The drum turned quietly, lights dimmed in deference to a diel cycle that a hundred years of tweaks and retrofits hadn't been able to weed from the genes. I sat alone in the galley, squinting from the inside of a system whose outlines grew increasingly hazy, trying to compile my latest—how had Isaac put it? — postcard to posterity. Cunningham worked upside-down on the other side of the world.

Except Cunningham wasn't working. He hadn't even moved for at least four minutes. I'd assumed he was reciting the Kaddish for Szpindel—ConSensus said he'd be doing it twice daily for the next year, if we lived that long—but now, leaning to see around the spinal bundles in the core, I could read his surfaces as clearly as if I'd been sitting beside him. He wasn't bored, or distracted, or even deep in thought.

Robert Cunningham was petrified.

I stood and paced the drum. Ceiling turned into wall; wall into floor. I was close enough to hear his incessant soft muttering, a single indistinct syllable repeated over and over; then I was close enough to hear what he was saying—

"fuck fuck fuck fuck…"

— and still Cunningham didn't move, although I'd made no attempt to mask my approach.

Finally, when I was almost at his shoulder, he fell silent.

"You're blind," he said without turning. "Did you know that?"

"I didn't."

"You. Me. Everyone." He interlocked his fingers and clenched as if in prayer, hard enough to whiten the knuckles. Only then did I notice: no cigarette.

"Vision's mostly a lie anyway," he continued. "We don't really see anything except a few hi-res degrees where the eye focuses. Everything else is just peripheral blur, just— light and motion. Motion draws the focus. And your eyes jiggle all the time, did you know that, Keeton? Saccades, they're called. Blurs the image, the movement's way too fast for the brain to integrate so your eye just—shuts down between pauses. It only grabs these isolated freeze-frames, but your brain edits out the blanks and stitches an — an illusion of continuity into your head."

He turned to face me. "And you know what's really amazing? If something only moves during the gaps, your brain just—ignores it. It's invisible."

I glanced at his workspace. The usual splitscreen glowed to one side—realtime images of the scramblers in their pens—but Histology, ten thousand times larger than life, took center stage. The paradoxical neural architecture of Stretch & Clench glistened on the main window, flensed and labeled and overlaid by circuit diagrams a dozen layers thick. A dense, annotated forest of alien trunks and brambles. It looked a little like Rorschach itself.

I couldn't parse any of it.

"Are you listening, Keeton? Do you know what I'm saying?"

"You've figured out why I couldn't—you're saying these things can somehow tell when our eyes are offline, and…"

I didn't finish. It just didn't seem possible.

Cunningham shook his head. Something that sounded disturbingly like a giggle escaped his mouth. "I'm saying these things can see your nerves firing from across the room, and integrate that into a crypsis strategy, and then send motor commands to act on that strategy, and then send other commands to stop the motion before your eyes come back online. All in the time it would take a mammalian nerve impulse to make it halfway from your shoulder to your elbow. These things are fast, Keeton. Way faster than we could have guessed even from that high-speed whisper line they were using. They're bloody superconductors."

It took a conscious effort to keep from frowning. "Is that even possible?"

"Every nerve impulse generates an electromagnetic field. That makes it detectable."

"But Rorschach's EM fields are so—I mean, reading the firing of a single optic nerve through all that interference—"

"It's not interference. The fields are part of them, remember? That's probably how they do it."

"So they couldn't do that here."

"You're not listening. The trap you set wouldn't have caught anything like that, not unless it wanted to be caught. We didn't grab specimens at all. We grabbed spies."

Stretch and Clench floated in splitscreen before us, arms swaying like undulating backbones. Cryptic patterns played slowly across their cuticles.

"Supposing it's just— instinct," I suggested. "Flounders hide against their background pretty well, but they don't think about it."

"Where are they going to get that instinct from, Keeton? How is it going to evolve? Saccades are an accidental glitch in mammalian vision. Where would scramblers have encountered them before now?" Cunningham shook his head. "That thing, that thing Amanda's robot fried— it developed that strategy on its own, on the spot. It improvised."

The word intelligent barely encompassed that kind of improvisation. But there was something else in Cunningham's face, some deeper distress nested inside what he'd already told me.

"What?" I asked.

"It was stupid," he said. "The things these creatures can do, it was just dumb."

"How do you mean?"

"Well it didn't work, did it? Couldn't keep it up in front of more than one or two of us."

Because people's eyes don't flicker in synch, I realized. Too many witnesses stripped it of cover.