Cipher in the Margins

The logbook smelled less like Tano every day. Clove oil fades if you keep opening the cover, and Pima had opened it enough times now that the leather had started to smell like her own hands instead — soap, vinegar, the iron tang that never washed off after a double shift of scraping resin.

She'd traded the linen store for her own bunk this time, curtain drawn on its rod, boots against the door the way Sari's rest-period rule required and nobody ever checked. Four hours until the dormitory matron's knock. Five shifts until the seal. She had the duct diagram flattened under her knee — the one she'd penciled onto the back of Tano's foundation blueprint herself, translating his shorthand numbers into joint seams the morning she'd cracked them — and the logbook open against her raised thighs. She meant to use every minute of the four hours on the margins she hadn't been able to break.

The margins were the problem. Tano's main entries she could read cold by now — dates, hauling weights, the shorthand for pier and joint she'd already cracked twice over. But he'd drawn things in the margins too, small and repeating, a curved double line with a cross-hatch through the belly of it, over and over down eleven pages, and she'd been reading them as structural cross-sections. Duct seams. Pipe collars.

She tried the obvious thing first, because the obvious thing was usually right. She laid the logbook page directly over the duct diagram, margin against margin, and shifted it until the curved line sat where a joint seam should be. It didn't sit anywhere close. The shape was too narrow at one end and too wide at the other, narrowing again past the point where any duct run would need to widen for airflow. She tried it against three other joints on the diagram. Same mismatch every time, like forcing a boot onto the wrong foot and blaming the boot.

So it wasn't a duct. She set the diagram aside and held the page up to the lamp instead, turning it sideways, the way she used to turn Lanu's anatomy plates when a professor's draftsman had drawn a vessel at an angle no living body actually presented.

And there it was. Not a pipe collar. A throat.

The curve was a jaw line. The cross-hatch was suture notation, the exact shorthand the Academy drilled into first-years before they were trusted with a scalpel — the mark for a graft seated and load-tested, drawn the same whether you were closing a hand wound or reattaching a burn flap. She'd drawn that mark herself, forty, fifty times, on cadaver skin that didn't bleed and didn't care. Her own version of it, she noticed now, holding her wrist notes up beside his, still came out crooked no matter how many times she practiced. His had always been clean. Even sick, even down there in the dark, his hand hadn't lost that.

She flipped back through the eleven pages with the lamp closer, fast now, matching each margin sketch to the entry beside it. A throat, dated eleven days ago, beside a note: M. — resp. easier post-graft, tissue holding warm. M. Muka. A wrist, eight days ago: P.D. — no rejection at day three, growth accepts host without forcing. She didn't know who P.D. was. She didn't want to.

She had been reading this book as a man's confession of what was happening to him. Sabotage notes. A structure failing, and Tano cataloging the failure the way she would have, precise and helpless, because that was the brother she remembered: too smart for his own good, never too cruel to watch something suffer without trying to fix it.

That wasn't what this was.

These weren't the notes of a man losing a fight. They were case records. He wasn't being consumed by the thing living in Kaba's foundations. He was operating on it, and operating the dying onto it, joining failing tissue to a growth that didn't know how to let anything finish dying — patient by patient, graft by graft, the way she'd once watched a surgeon splice a torn vessel shut and call it a save.

He hadn't lost. He'd found something he believed was better than dying, and he was giving it to people who couldn't say no.

The horror of that sat differently than the wet sounds in the stairwell, differently than the soil under Muka's nail. Those had frightened the animal part of her. This frightened the part that had once wanted, badly, to be as smart as him.

She turned to the last of the eleven pages expecting another throat, another wrist, another patient's initials she'd have to carry home in her chest. Instead there was a single line in the bottom margin, no diagram beside it, the ink slightly darker where his pen had pressed and paused, pressed and paused, like he'd stopped to think between each word.

You always did read faster than you should, Pima.

The lamp flame didn't move. Her hand, holding the page level, did.

He had written that before the resin ever sealed the terminal box, before she'd broken it open, before she'd even started her first shift. He had written it knowing, somehow, that she would come looking, and that she would get this far.