Mira didn't sleep.
She sat with the little folder open on her narrow bed long after Master Corse had gone, finally, to whatever thin rest he could manage, and she studied the map of a village that did not exist the way she'd once studied her letters as a child, like if she looked hard enough the shapes would finally mean something.
It was good work. That was the first thing she noticed, once the initial shock of it had worn thin enough to let her actually see the page instead of just the fact of it. Whoever had drawn Reyth had drawn it with real skill, the roofs weighted correctly, the well placed at a sensible distance from the tannery, a stream sketched in with the kind of confident, unhurried line that only came from a hand that had drawn a thousand streams before this one and trusted itself completely. It didn't look like a forgery or a fever dream. It looked like a survey. It looked like truth.
At the bottom corner, so small she nearly missed it, was a signature. Not Corvain Ashe's. A single letter, C, inside a circle, and beneath it, in handwriting so careful it might have been carved rather than written: for M.
For M.
Mira set the page down and pressed the heels of her hands against her eyes until she saw colors that weren't grey.
She found Bellwether the Guild clerk at his desk before the sun was properly up, surrounded by his usual fortress of dispatch orders, and asked him, as casually as she could manage with roughly four hours of sleep in her, whether the Guild kept records of foundlings.
"Everyone, Kessel. We keep records of everyone who's ever drawn breath inside these walls, apprentice or Master." Bellwether didn't look up from his ledger, which was either a mercy or simply Bellwether being Bellwether. "Why, you finally curious about your own file?"
"Something like that."
"It's not much to look at. I pulled it once, years back, when you were being difficult about a supply order and I wanted to know if you'd always been difficult." He said this with the particular fondness of a man who considered difficult apprentices a personal hobby. "Found at Reyth crossing, age six, no kin located, remanded to Master Corse's apprenticeship on the personal order of the Guildmaster."
Mira's pulse did something complicated. "Whose personal order?"
"That's the odd bit. It's not signed with a name. Just an initial." Bellwether finally glanced up, and something in her face must have shown more than she meant it to, because his easy tone dropped half a register. "You alright, Kessel?"
"What initial?"
He didn't need to check the ledger. Some things, apparently, a man remembered even when he had no reason to.
"A C," he said. "In a circle."
She found Master Corse in the mapping hall, the long room where the Guild's oldest surveys were stored in flat drawers that ran floor to ceiling on every wall, and she didn't bother easing into it.
"You knew," she said. "You knew who signed the order that brought me here."
Master Corse didn't ask what she meant. That, more than anything, told her everything she needed to know about how long he'd been carrying this. He set down the drawer he'd been sliding shut and turned to face her fully, and in the grey morning light through the tall windows he looked older than she'd ever seen him, older than last night even, as though the telling of it had cost him something he couldn't easily replace.
"I knew it wasn't a Guildmaster's hand," he said. "I told myself, for eleven years, that it might have been anyone. A clerk with initials that matched. A coincidence." He shook his head slowly. "I have never once believed that, Kessel. I simply found it easier to live beside the lie than to hand a six year old girl a truth that terrible."
"Which is?"
"That he placed you here himself. In this hall. Under my instruction, specifically, because he knew my rule, the one I raised you on, the one about the map recording the world and never correcting it." Master Corse's voice had gone very quiet, the way a man's voice goes quiet when he's finally saying something he has rehearsed alone, in the dark, more times than he could count. "I have spent eleven years teaching you the one lesson he needed you not to learn from anyone else first. And I am only now understanding, this morning, standing in this hall, that he did not do that to keep you safe from becoming like him."
"Then why?"
"Because a blade sharpens best against a stone that resists it," Master Corse said. "I think he wanted you raised exactly as you were raised. Careful. Precise. Certain that invention is a sin. Because a cartographer who has spent her whole life believing that is a cartographer who will hesitate, deeply and instinctively, the first time she discovers what she can actually do. And hesitation, Kessel, in a person with power like yours, is not a flaw." His eyes were wet, though his voice never broke. "It is a leash. And I have been holding the other end of it for him without ever once knowing it was in my hand."
Mira didn't say anything for a long moment. Outside the tall windows, Aldermoor was waking up around them, oblivious, ordinary, cart wheels and market bells and none of it aware that somewhere in the mapping hall a foundation eleven years deep had just come apart at the seams.
"What do we do," she said finally, "with a leash, once we know it's there?"
Master Corse almost smiled. It didn't reach very far.
"We find out who's really holding it," he said, "and we cut it ourselves, before he can use it. Which means, Kessel, that like it or not, you and I need to find out what happened to the person who drew Reyth. Not Ashe. Whoever taught him."
The mapping hall's outer door opened before Mira could answer, letting in a slice of cold morning air and a junior clerk, white faced and out of breath, who didn't wait to be acknowledged before he spoke.
"Master Corse. There's a rider from the eastern watch. A settlement's gone grey without warning, no build up, no thinning at the edges the way it's supposed to go." The clerk swallowed hard. "They're saying it started from the inside out."
Master Corse and Mira looked at each other, and Mira understood, with a cold certainty that settled into her bones like the first frost of a bad winter, that whatever this was, it was not a coincidence, and it was not going to wait politely for them to finish their conversation.
"Where," Master Corse said.
The clerk told him, and Mira watched every last trace of color leave her mentor's face, because the settlement the clerk named was the one place in all of Veyra that, by every rule either of them had ever been taught, should never have been able to go grey at all.
It was Aldermoor's own outer district. The Guild's own doorstep.