This was Sarasti's safer alternative. This was the path we'd followed because it would have been too dangerous to release the prisoners. We were so deep inside the bow shock that we'd had to shut down our internal augments; while Rorschach's magnetosphere was orders of magnitude weaker here than within the structure itself, who knew if the alien might find us too tempting a target—or too great a threat—at this range? Who knew when it might choose to plunge some invisible spike through Theseus's heart?

Any pulse that could penetrate the ship's shielding would doubtless fry Theseus's nervous system as well as the wiring in our heads. I supposed that five people in a dead ship would have a marginally greater chance of survival if their brains weren't sparking in the bargain, but I doubted that such a difference would make much difference. Sarasti had obviously figured the odds differently. He'd even shut down the antiEuclidean pump in his own head, resorted to manual injections to keep himself from short-circuiting.

Stretch and Clench were even closer to Rorschach than we were. Cunningham's lab had been kicked free of the ship; it floated now just a few kilometers from the artefact's outermost spires, deep within the folds of its magnetic field. If the scramblers needed radioactive magnetite to function, this was the most they were going to get: a taste of the fields, but not of freedom. The lab's shielding was being dynamically fine-tuned to balance medical necessity against tactical risk, as best the data allowed. The structure floated in the watchful crosshairs of our newborn gun emplacements, strategically positioned to either side. Those emplacements could destroy the hab in an instant. They could probably destroy anything approaching it as well.

They couldn't destroy Rorschach, of course. Maybe nothing could.

Covert to invulnerable. As far as we knew that hadn't happened yet. Presumably Theseus could still do something about the artefact accreting off our bow, assuming we could decide which thing to do. Sarasti wasn't talking. In fact, I couldn't remember the last time any of us had even seen the vampire in the flesh. For several shifts now he had confined himself to his tent, speaking only through ConSensus.

Everyone was on edge, and the transient had gone quiet.

Cunningham muttered to himself, stabbed at unfamiliar controls with unpracticed fingers, cursed his own clumsiness. Stimulus and response flowed through lasers across six kilometers of ionized vacuum. The ever-present nicotine stick hung from one corner of his mouth for want of a free hand. Every now and then flecks of ash broke free and drifted obliquely towards the ventilators.

He spoke before I could. "It's all in ConSensus." When I didn't leave he relented, but wouldn't look at me: "Magnetite flecks lined up as soon as they got past the wavefront, more or less. Membranes started to fix themselves. They're not failing as fast. But it's Rorschach's internal environment that will be optimized for scrambler metabolism. Out here, I think the most we can do is slow the rate of dying."

"That's something, at least."

Cunningham grunted. "Some of the pieces are coming together. Others—their nerves are frayed, for no good reason. Literally. Signal leakage along the cables."

"Because of their deterioration?" I guessed.

"And I can't get the Arrhenius equation to balance, there's all this nonlinearity at low temperatures. The preexponential value's completely fucked up. It's almost as though temperature doesn't matter, and — shit—"

Some critical value had exceeded a confidence limit on one of his displays. He glanced up the drum, raised his voice: "Need another biopsy, Susan. Anywhere central."

"What—oh. Just a second." She shook her head and tapped off a brief spiral of icons, as listless as the captives she commanded. On one of Cunningham's windows Stretch viewed her input with its marvelous sighted skin. It floated unresponsive for a moment. Then it folded back the arms facing one wall, opening a clear path for Cunningham's teleops.

He called two of them from their burrows like prehensile serpents. The first wielded a clinical core-sampler; the second wielded the threat of violence in case of foolish resistance. It was hardly necessary. Blindsighted or not, scramblers were fast learners. Stretch exposed its belly like a victim resigned to imminent rape. Cunningham fumbled; the teleops bumped together, briefly entangled. He cursed and tried again, every move shouting frustration. His extended phenotype had been amputated; once the very ghost in the machine, now he was just another guy punching buttons, and—

— and suddenly, something clicked. Cunningham's facades swirled to translucency before my eyes. Suddenly, I could almost imagine him.

He got it right the second time. The tip of his machine shot out like a striking snake and darted back again, almost too fast to see. Waves of color flushed from Stretch's injury like ripples chased across still water by a falling stone.

Cunningham must have thought he saw something in my face. "It helps if you try not to think of them as people," he said. And for the very first time I could read the subtext, as clear and sharp as broken glass:

Of course, you don't think of anyonethat way…

Cunningham didn't like to be played.

No one does. But most people don't think that's what I'm doing. They don't know how much their bodies betray when they close their mouths. When they speak aloud, it's because they want to confide; when they don't, they think they're keeping their opinions to themselves. I watch them so closely, customize each word so that no system ever feels used— and yet for some reason, that didn't work with Robert Cunningham.

I think I was modeling the wrong system.

Imagine you are a synthesist. You deal in the behavior of systems at their surfaces, infer the machinery beneath from its reflections above. That is the secret of your success: you understand the system by understanding the boundaries that contain it.

Now imagine you encounter someone who has ripped a hole in those boundaries and bled beyond them.

Robert Cunningham's flesh could not contain him. His duties pulled him beyond the meat sack; here in the Oort, his topology rambled all over the ship. That was true of all of us, to some extent; Bates and her drones, Sarasti and his limbic link—even the ConSensus inlays in our heads diffused us a bit, spread us just slightly beyond the confines of our own bodies. But Bates only ran her drones; she never inhabited them. The Gang of Four may have run multiple systems on a single motherboard, but each had its own distinct topology and they only surfaced one at a time. And Sarasti—

Well, Sarasti was a whole different story, as it turned out.

Cunningham didn't just operate his remotes; he escaped into them, wore them like a secret identity to hide the feeble Human baseline within. He had sacrificed half of his neocortex for the chance to see x-rays and taste the shapes hiding in cell membranes, he had butchered one body to become a fleeting tenant of many. Pieces of him hid in the sensors and manipulators that lined the scrambler's cages; I might have gleaned vital cues from every piece of equipment in the subdrum if I'd ever thought to look. Cunningham was a topological jigsaw like everyone else, but half his pieces were hidden in machinery. My model was incomplete.

I don't think he ever aspired to such a state. Looking back, I see radiant self-loathing on every remembered surface. But there in the waning years of the twenty-first century, the only alternative he could see was the life of a parasite. Cunningham merely chose the lesser evil.