Down was the only direction that made sense.
The passages above me ended at rubble or locked maintenance hatches or the same dead ends I'd already catalogued. The junction sat at the top of whatever was below and the only thing below it was the Errata, which was enormous and ungoverned and full of people who had no reason to help me.
It was also where Eirene had been going for months. These facts did not resolve each other. They just sat together, both true, waiting for me to pick one and move.
I picked the widest passage and moved.
My mouth tasted like a night spent on stone. I had water but I didn't use it for that — the canteen had to last and I didn't know yet where to refill it, which meant every mouthful counted for something more than comfort. I swallowed against the staleness and kept moving.
The descent took long enough that I stopped measuring it. The architecture changed as I went — Order-built infrastructure giving way to older stone, the kind with no rune-anchors, no official markings, no tell of when or who. The walls stopped being walls and started being something more like argument: old stone arguing with newer construction arguing with scavenged material arguing with the accumulated weight of everyone who'd been down here since the Errata started accumulating people.
The fungi thickened. Not randomly — they clustered in the mortar cracks, yes, but also in patterns I couldn't read. Following something. Growing toward something. The colours shifted — less blue-green, more gold, more amber, light that had no business being warm and was anyway, the specific warmth of things that grow in dark places and figure out how to glow regardless. They grew thicker at every junction. Thickest where the walls converged.
Then: sound.
Not machinery. Voices — two people arguing at full volume about something I couldn't parse from this distance, not even the subject, just the heat of it, the absolute lack of concern for who might hear. Someone laughing somewhere I couldn't see, high and unguarded. A child running, footsteps quick and random, going nowhere in particular. An infant somewhere making the particular sound infants make when they have opinions about nothing.
Nobody lowering their voice.
I stopped at the edge of a wider passage and stood in the shadow of the wall and watched people move through it. A woman carrying a basket of what looked like salvaged metal pieces, walking fast, not looking at anyone. Two men smoking in a doorway, gesturing at something above them I couldn't see. An old man with a cart, slow, unbothered.
No checkpoints. No scan-wands. No Warden in the standard green coat doing their standard assessment sweep.
I had grown up in a city where you learned, before you learned almost anything else, to lower your register in public spaces — to take up less air, to walk with the posture of someone being cooperative, to know where the surveillance runes were on any block you spent time on and factor them into how you stood. The Order didn't have to enforce this consciously. The city enforced it for them. You just absorbed it, growing up in it, until being in public meant being observed and you shaped yourself accordingly, continuously, below the level of thought.
Nothing in the Errata's public passage was shaped that way.
I filed this and didn't enter. Told myself I was mapping first — exits, crowd density, the direction that moved less. Told myself I was being methodical. Stood there longer than methodical required, with my back against the wall and the void quiet in my chest and the specific paralysis of someone who had never done this before and was trying very hard to look like they had.
Then I entered.
Nobody looked at me for more than a second. This was either because I didn't register as interesting or because the Errata had a different relationship to strangers than the city above. I suspected both. I kept moving.
The chalk arrow was at knee height, in a maintenance alcove just past a junction where three passages met.
I almost walked past it. The alcove was dark — the fungi hadn't taken hold there — and I'd been keeping my headlamp angled toward the ground to avoid making myself obvious, which meant I nearly missed the mark entirely. Something made me look. I don't know what. The particular quality of a shadow, maybe, or the fact that my eyes had started reading walls for information the way my hands read surfaces for exits.
I crouched down.
My knees registered the stone immediately — not pain, just the surface asserting itself, the specific pressure of a material that doesn't give. I had been walking since the junction last night and my feet had developed opinions about my boots that my boots were not equipped to answer.
It was chalk. Pale against stone, drawn by someone crouching, someone in a hurry — the lines had the quality of quick work, decisive rather than careful. An arrow pointing deeper into the Hollows.
I knew Eirene's handwriting the way I knew her breathing. Eighteen years of proximity and that specific intimacy of twins who'd shared a room — you knew things about each other that didn't require cataloguing, that were just part of the texture of sharing space with someone for long enough. The particular way she formed letters. The double line on the shaft of an arrow, the slight upturn at the tip. She did it automatically, had done it since we were seven and she decided arrows needed to look like they meant business.
This was hers.
I stayed crouched for longer than I needed to. Touched the edge of the chalk without smudging it — just the stone beside it, just to have something to press my fingers against.
She had been here. Recently enough that the chalk hadn't fully dusted away; when I held my headlamp close I could see it was still slightly raised from the surface, not yet worn flat by the passage of air and time and strangers walking through.
She was here.
The void stirred. I pushed it down, automatic.
I followed the arrow.
It led me through the industrial layer first — the sounds and smells changing before the passage fully opened, heat threading into the cold, the specific metallic edge of forge-work and steam. Workers moved around me without looking. The forges were salvage construction, cobbled together from materials I couldn't identify, and the people running them moved with the efficiency of people who'd been doing this long enough that they'd stopped thinking about it. One woman caught my eye briefly, read my face, looked away. Not hostility. Assessment and dismissal. I didn't register as interesting enough to worry about.
Then the Hollows proper.
The ceiling lifted. The spaces widened. Light strung between structural beams — hand lamps, lanterns, bioluminescent panels that someone had carefully cultivated into something approximating wall sconces. Houses built into structural cavities, carved into old foundations, leaning against ancient walls with the specific confidence of things that have been there long enough to start seeming permanent. Children moving through the passages without watching where they were going. An older woman tending something growing in a crack in the wall, careful and unhurried. Two teenagers sitting with their legs dangling off an elevated walkway, talking loudly about something that made one of them laugh until she nearly fell.
No one checking anyone's papers. No visible compliance runes.
I kept my headlamp off down here — too conspicuous — and navigated by the ambient light, which was enough, and by the specific quality of attention people paid to spaces, which told you where it was safe to walk and where it wasn't. I had always been good at reading spaces. The void made me better at it, in ways I'd spent eighteen years pretending didn't exist — the way I felt the pressure of presences before I registered them, the way exits announced themselves to me without quite requiring me to look.
The arrow led me through three more junctions before it stopped.
The last one pointed toward a passage I hadn't tried yet. Deeper, lower. The pre-Spire stone again, the kind with the argument written into it.
I stood at the junction for a moment and looked at the chalk and didn't follow it.
I told myself it was practical. The chalk was hours old — she'd been here last night — and following her trail wasn't the same thing as finding her, and I needed to eat something and figure out where I was sleeping before I went deeper into a place I didn't know. All of that was true.
It was also true that I had been awake most of the night and the passage below was darker than anything I'd navigated yet and I didn't know what I was doing. I had packed a bag six weeks ago and followed my sister into the dark and now I was standing at a junction in the Errata with chalk on my fingers and no plan beyond keep moving and the passage below was very dark and I did not know what I was doing.
I filed the junction. I kept moving.
The passage the arrow pointed to had a branch I hadn't noticed.
I found it by accident — going back to look at the chalk arrow a second time, trying to fix the exact direction in my memory, and realizing that what I'd read as a single passage was actually two, the second narrower, angling away into a section of the lower Hollows I hadn't mapped yet. I went a few steps down it. Listened. The sound was different here — less open, less communal, the particular quiet of a space people used for something specific rather than passed through.
I went a few more steps.
The passage opened into a workspace.
Not a forge — something quieter. Shelving built directly into the stone walls, packed with salvage sorted by type and size, the specific organization of someone who knew exactly where everything was and wanted to keep it that way. Lanterns hung from hooks at even intervals. Tools arranged on a long surface in a way that would have looked casual if the spacing hadn't been precise.
I understood immediately that I had walked into somewhere I wasn't supposed to be.
I turned to leave.
"Don't."
The voice came from above and behind me — from a platform I hadn't seen, set into the wall above the shelving. I turned back slowly. Someone was there, sitting very still in the way people sat still when they'd been watching you for longer than you'd been in the room and had been deciding what to do about it.
They dropped from the platform in a single movement. Landed without sound.
Tall. Broad through the shoulders, the kind of broad that came from work rather than training. Dark hair streaked grey, pulled back without ceremony. Middle-aged, maybe older — it was hard to tell down here, where the light didn't do faces any favors. She was looking at me the way you looked at something that had wandered into your space and hadn't yet established whether it was a problem.
"You're in my space," she said. Flat. Not a question.
"I know. I'm sorry. I'll go."
She didn't move to let me pass.
Her eyes moved over me — not the way you assessed a threat, but the way you assessed something smaller and more specific. Young. Alone. The bag on my back. The state of my boots.
She made a sound that wasn't quite a laugh. Not unkind. Just the sound of someone who had seen this particular thing before and had an opinion about it.
"How long have you been down here."
"Since last night," I said.
Something shifted in her face. Filed.
"Alone."
"Yes."
She looked at me for another moment — that same unhurried assessment, nothing urgent in it. Then her head turned, very slightly, toward the passage above us. Listening for something I couldn't hear yet.
"Back against the shelves," she said. Quiet. Immediate.
I didn't ask why. Something in her voice made the asking irrelevant. I moved.
She was already moving too — not toward the passage but to the work space's far wall, where a gap in the stone I hadn't noticed became, on second look, a deliberate space. Wide enough. She gestured once.
The sound reached me then.
Boots. Multiple sets, the specific cadence of people moving in formation, the kind of rhythm that came from training rather than intention. And underneath it, low and directional, the hum of scan-wands sweeping for magical signatures.
Order Wardens.
In the Errata.
My chest went cold.
Not fear — the void. Rising to meet the fear before the fear could fully form, reaching the way it always reached when something threatened, the warmth in my hands that wasn't warmth flaring hot and immediate. I felt the frost threading my fingers before I'd registered the danger consciously. Felt the cold spreading up my wrists.
No, I told it.
The void pushed back. Harder than it had in days, harder than anything since the junction last night, with the specific urgency of something that had been waiting for permission and had just found a reason to stop waiting.
They'll hear the scan-wand pick you up, I told it. Both of us. Don't.
A pause. Like something considering.
I pressed both hands flat against the shelving behind me, stone cold through my palms, and held it there.
The gap in the wall was narrow. She was already in it — had gone first, which I noticed, which meant something about the specific logic of how she moved through dangerous spaces. I angled in sideways. My shoulder met hers in the dark. Neither of us moved.
The Wardens entered the workspace.
I could hear them more clearly now — three, maybe four. The scan-wands sweeping in overlapping arcs, the hum cycling through registers as they moved. A voice: "Clear here. Check the upper passage." Another voice acknowledging. Footsteps crossing the workspace below us.
The void pressed against my grip. The frost was at my elbows.
I thought: if it surges in this enclosed space, in this stone, the resonance will carry. The scan-wand will find it. Will find both of us.
I thought: this woman doesn't know me. She doesn't owe me anything.
Hold, I told the void. Hold.
The footsteps paused directly below.
I did not breathe.
Beside me, in the dark, she wasn't breathing either. I was aware of her the way you were aware of the only other warmth in a cold space — shoulder to shoulder, close enough that I could feel the absolute stillness she'd achieved, the particular quality of someone who had done this before and had learned that stillness was a skill rather than an absence.
The scan-wand cycled through its highest register.
The void surged.
I caught it — barely, with both hands, a grip that cost something I didn't have a name for yet. The frost retreated to my wrists and stopped. I felt the effort of it in my sternum, a pressure that radiated outward, and breathed through it with my lips pressed together and my eyes closed and my palms flat and burning cold against the stone.
The wand cycled down.
"Nothing. Move up."
Footsteps receding. The hum fading. The particular quality of a space that had held its breath releasing it, slowly, back into something ordinary.
I stayed still until the sound was entirely gone.
Then I exhaled.
Beside me, she exhaled too.
We stayed in the gap for a moment longer than necessary. Then she moved, and I followed, and we were back in the workspace with the lanterns burning steady and the Errata going about its business above.
She looked at my hands.
The frost hadn't entirely faded. It sat in the creases of my knuckles, caught the lantern light in a way frost had no business catching light.
She looked at it for a moment. Then she looked at my face. Then she made that sound again — the not-quite-laugh, quieter this time, with something different underneath it.
"How old are you, girl?" she said.
"Eighteen."
"Eighteen," she repeated, as though this explained something she'd already suspected. She shook her head once, the particular head shake of someone who had made a decision about a situation and the decision was exasperation. "Go home."
"I can't."
"Can't or won't."
I didn't answer. She looked at me — at the bag, at the boots, at whatever was showing in my face that I hadn't managed to put away — and something shifted in her expression. Not softer. Just more specific.
"There's a market two junctions up," she said. "North fork. They won't ask you questions you don't want to answer."
I should have left. I knew I should have left.
"Do you know the Root Singer?" I asked.
She stopped.
Not dramatically. Just — the motion of her hands stilled, the way motion stilled when something unexpected arrived and the body needed a second to decide what to do with it.
Then she turned around.
The not-quite-laugh was gone. Whatever door it had been propping open had closed, quietly, while I wasn't watching.
"Root Singer," she said.
"Yes."
She looked at me for a long moment. The assessment again, but different now — not reading me for threat, not reading me as something young and lost and mildly inconvenient. Reading me for something she'd decided she didn't want to know more about.
"Don't know anyone by that name," she said
She turned back to her shelving. The conversation was over — not because she'd ended it but because she'd decided that was all she was going to give me, and more wouldn't do either of us any good.
I went back to the passage.
At the junction I stopped and looked back. The workspace entrance was dark from this angle — no sign of lanterns, no sign of anything. Just stone.
She'd told me to go home. Tucked me into a wall and waited out the Wardens and told me to go home like I was a child who'd wandered somewhere I didn't belong, which I was, which didn't make it sting less. And then I'd said two words and the exasperation had gone somewhere I couldn't follow and she'd looked at me with that closed, careful blankness and said she didn't know.
She knew.
Not knowing what I was asking about and the name Root Singer were two different things, and she'd only claimed one of them.
The void hummed low in my chest. Quieter now. Whether that was exhaustion or something that felt, uncomfortably, like the first thread of a direction — I couldn't tell.
I went back up to the market level.
The market was steadier here than anywhere else I'd been. Not just the stalls — the whole space. Awnings hung at clean angles. Lanterns burned evenly, no guttering, no smoke. The pressure in the passages felt almost… managed. I noticed it the way you notice a word you've never registered suddenly appearing everywhere. Something was maintaining this. Constantly. I didn't know what.
At some point in the afternoon my body stopped asking politely. I had been ignoring it for hours — adding it to the list of things I was managing, filing it under later — and then later arrived and I had to figure out, with no prior knowledge and a strong preference for invisibility, where the Errata put its latrines. The answer turned out to be a passage two junctions east of the market, marked by smell before anything else. Nobody had explained it to me. I had followed someone who looked like they knew where they were going and arrived somewhere I understood immediately and did not examine further.
I ate half a travel cake standing in the market passage because I had forgotten to stop and eat and my hands were shaking slightly in a way I was attributing to the Wardens until I recognised it as something simpler.
Evening arrived without announcing itself — the light didn't change the way it would have above, but the Hollows' rhythm shifted. I found a nook near the market's edge — first choice, too exposed, a main passage running six feet in front of it, strangers moving through every few minutes. I sat in it for ten minutes before admitting this and moving. Second choice: the crook of a structural pillar, partially concealed, two visible exits, far enough from the main passage that footsteps in it woke me rather than simply passing through me.
Sat down. Drank from the canteen.
Inventory: enough food for another day at half-rations if I was careful. Enough coin to buy more if I found somewhere that would sell to a stranger and if stranger-prices were reasonable — I had no idea if two copper was reasonable, had no idea if the woman at the stall had given me more than I paid for out of pity or less than I deserved out of caution. The headlamp worked. The bandages were still dry. My feet had specific grievances about my boots that I was not going to address tonight. My hands were cracked from the damp, the gold scars along my knuckles catching on the rough stone when I ran my fingers along walls, which I had been doing constantly and hadn't noticed until now. I was tired in the specific way you got tired when you'd been afraid for a long time without anything coming of it — not the good exhaustion of physical work but the grinding kind, the kind that sat in your shoulders and behind your eyes.
The void had been quieter since the workspace. Not gone — it was never gone — but something had changed in the quality of its presence. Less like something straining against a wall and more like something that had tested the wall and found it sufficient and was now waiting to see what I'd do with that information.
A rat moved along the wall beside me.
Old rat. The unhurried kind that had been alive long enough to stop being bothered by humans. It moved at its own pace, following the wall, investigating something in the mortar and then losing interest and continuing. It came within arm's reach of me and I shifted to give it more space — the automatic courtesy of someone who'd spent enough time in tight quarters to know that creatures with nowhere to go needed the space more than people who'd chosen to sit where they were sitting.
The void slipped.
Not dramatically. A flicker. A fraction of a second where the cold thing in my chest reached outward without my permission, without my knowledge, without any part of me deciding it should. The way your hand reaches for something before you've consciously thought to reach.
The rat went still. Completely, suddenly still — not the stillness of alert, not the stillness of cold, just a complete absence of whatever quality of being was usually present in moving things. For three seconds it was a rat-shaped object rather than a rat.
Then it moved again. Slower. Confused, if rats could be confused. It disappeared into a crack in the wall.
I stared at my hands.
The cold part of me noticed, with a detachment that I found more frightening than any other part of this, that it hadn't minded.
I had held it through the Wardens — through genuine terror, through a scan-wand cycling to its highest register three feet from where I was standing — and it had listened. It had pushed back and I had caught it and it had held.
And then it had slipped on a rat.
In a quiet moment. When nothing was happening. When I was sitting still and breathing and thinking about inventory.
I pressed my back against the pillar and breathed. Counted. The void retreated slowly, which was wrong, which was new. Like coaxing something back that had decided it was done taking direction.
What am I?
Not a question I was ready to answer.
I kept my boots on. Arranged the bag under my head — the least uncomfortable option, which was still bad, but the bag had to stay with me and my coat wasn't thick enough to do anything useful between my skull and stone. Back against the pillar. Both exits visible. I had read about sleeping rough in a book once, some account of someone surviving in the margins, and the book had made it sound manageable in the particular way books made hard things sound manageable because the writer had survived it and therefore knew it could be survived.
The stone was worse than I had understood it would be.
Not just cold, though it was cold. It found my hip and pressed. Found the specific architecture of my shoulder and had opinions about it. I had known it would be uncomfortable. I had not understood that uncomfortable was a spectrum and that stone occupied a position on that spectrum that had no relationship to anything I had previously called uncomfortable.
I lay there and learned this and did not move because moving meant admitting I had been naive about the stone, and I was not ready to admit that yet.
I didn't sleep so much as go away in increments.
Twenty minutes, then a sound I didn't recognize jolting me back. Forty minutes, then footsteps in the outer passage, someone moving with purpose, coming close and then going elsewhere. An hour, maybe, before something in me that had been holding on finally let go for a real stretch — long enough that I came back confused about where I was, reaching for Eirene's side of the room before the stone reminded me there was no room.
Between fragments I thought about the practiced efficiency of the packing. I couldn't stop. I had been cataloguing Eirene's days in my head for months — the late returns, the smell of somewhere else, the new quality of her sleep, the way she'd started moving through the apartment as though she had somewhere she'd rather be. I had assembled these things into something that felt like understanding and hadn't understood anything.
She had chalk arrows in the Errata. She had a color I'd seen in the margins of her sketchbook.
She had a name that made a stranger's hands go still.
When did you stop telling me things, I thought. At the dark. At the stone. At the specific cold of the pillar against my back.
Was it gradual or did you just decide?
No answer. The Errata didn't know me well enough to answer.
I slept again. This time I dreamed of the apartment and woke with the hollow specific feeling of a dream that had reminded me of something I was trying not to think about — Victor's hands around a cup he hadn't drunk from, the cedar block sitting in its place, the nick in the grain.
The person who used to correct that nick.
I pressed my hand flat against the stone and breathed until the feeling settled.
Somewhere in the Hollows below, someone was singing. Not an Order hymn — something older, slower, in a key that felt like it was trying to belong to a different time entirely. I didn't know the song. I lay there and listened to it until I couldn't hear it anymore.
The void hummed. Low and present.
Keep moving, I told myself, in the particular way I'd been telling myself things for years — not because I believed them absolutely, not because I had proof they were true, but because the alternative to telling yourself to keep moving was not moving, and I had never been able to make that choice, not once, not in eighteen years of practicing.
She always comes back.
The words felt thinner than they had two days ago.
I turned over on the stone and pulled my coat tighter and waited for the Errata to tell me when it was morning.
It didn't. It just kept moving, the way it always moved, as though nothing was different and nothing was lost and someone sitting in the dark waiting for dawn was simply one more ordinary thing in a place that had seen all of them.
Eventually I slept.