By Floor 110, the migration had become visible as a physical phenomenon.
Not the individual entities moving in a direction, the way a single fish turning indicates a tide before you can see it — this was the tide itself. The floor's ambient biology oriented in a single direction with the specific consistency of a system responding to a large-scale signal. The bioluminescent panels were dimmer than their standard output, the biological lighting responding to the floor's changed energy allocation. The air pressure had shifted, a subtle differential between the upper and lower seam connections that Kiran's body registered as a persistent low-level push.
Toward the wound.
Everything in the Abyss was going toward the wound.
"The entity count on this floor," Daveth said, reading his tactical display, "is forty percent below the facility's twelve-day-old baseline reading."
"Where are the other sixty percent?"
"The display is showing elevated signatures below Floor 150." He scrolled the display's range down. "Below 150, the count is three times the baseline. And concentrated. Not distributed through the floor ecology — concentrated in the zone between Floor 200 and Floor 285."
Floor 285. The wound's primary biology. The cavity. The door.
Sixty percent of the floor's ecology had moved toward the wound in the twelve days since the descent team had last passed through. The ecology was assembling itself in the wound's proximity like an immune system response — or like an audience.
"Something is happening at the wound," Kiran said.
"The broadcast," Daveth said.
"The broadcast has been running for fourteen months. The ecology didn't respond to it at this scale before." He looked at the floor's emptied landscape, the worked stone and the dimmed panels and the absence of the entities that should have been operating here. "The door's brief opening changed something. The wound's biology is doing something it hasn't been doing."
"What?"
"I don't know yet."
---
The evidence of the preceding divers was dense below Floor 100.
Thirty-six sites between Floor 100 and Floor 115. He stopped counting the abandoned packs and the discarded equipment and started counting the other signs instead: the chalk messages on the walls, the personal objects left at junctions, the toll-payments at the thresholds of floors that the wound's broadcast had apparently designated as significant.
At Floor 103, someone had left an entire medical kit — not the cheap surface-issue kind, a professional below-line rated kit, the kind that cost several months of a Dive Authority salary — packed carefully in its sealed case, set at the junction's center. The kit was unopened. They'd brought it all the way down and decided at Floor 103 that they didn't need it where they were going.
At Floor 107, a set of boot prints in the fine stone dust ended at the floor's primary seam entrance. Just ended. The divers' prints coming in from the upper seam, crossing the floor, reaching the lower seam entrance — and then nothing. No exit prints. The floor's ambient hadn't been disturbed in any other way. Whatever the floor had done with them, it had done it cleanly.
He stood at the entrance for thirty seconds and ran through the possibilities.
"Entity contact," Daveth said. He was reading the dust's disturbance pattern. "Not recent. Three days old. There was a brief floor response — the thermal residue says two or three entities, fast contact. Then nothing." He looked at the lower entrance. "They went down."
"Into the floor contact?"
"Into whatever the entities were. Or with them." He looked at the nonexistent exit prints. "The floor biology at this depth — you've seen it more than I have. Entities that incorporate."
He had. The pilotfish entities that guided, the tissue-integration that the wound's biology had built into Markos, the Congregation of the Silent which had been a civilization before it became a distributed consciousness. The Abyss below the sanity line didn't always consume what it contacted. Sometimes it changed it.
"If they're alive, they're below us," he said.
"If they're alive," Daveth said.
They went down.
---
The wound-tissue pocket's signal reached him at Floor 130.
Not the full signal — not the way it had been when he was in the wound's primary biology, the saturation that had run the carry operation and the transit through Floor 259 and the long march up to Floor 258. Attenuated, thread-like, the signal reaching through fifty floors of standard Abyss architecture on the long biological conductivity of the seam network.
But present.
His pulse-rhythm integration re-engaged with the familiar resonance of something it had been calibrated to. The void-skin's dark markings brightened slightly — not dramatically, the way they would at Floor 200, but a perceptible shift in the bioluminescent output.
"The pocket," Daveth said. He was watching Kiran's markings.
"Yes. Still running. The colony survived the weeks since my ascent."
"Of course it did," Daveth said. "The wound doesn't lose things it's keeping."
He walked and felt the signal running through his biology and thought about that sentence. The wound kept what it received. The names of the three dead divers in the organ system's walls. The caretaker code in his void-skin. The access signature from the door's brief opening.
His grief architecture. His fourteen months of calibrated exposure. His specific biology.
The wound was keeping him too, in the sense that mattered: it was maintaining the conditions that made him operable. The long-range pocket signal. The caretaker code, dormant at this depth but present in the void-skin's structure, available when he reached the wound's proximity. The access signature that would make the next contact easier than the first.
The wound was maintaining him the way it maintained everything it intended to use again.
---
Marek Vorn's marks continued at intervals below Floor 100.
Not the wound's notation — that had been at Floor 85, a single message. Below Floor 100, the marks shifted to a hybrid: Dive Authority standard floor-numbering notation combined with symbols Kiran didn't recognize. Not random. A system. The floor numbers were clear enough; the symbols beside them were an annotation he couldn't read.
At Floor 112, one of the symbols appeared without a floor number. Just the symbol, cut into the seam wall at the junction threshold, deep and careful and recent.
"He's been through here in the last two days," Daveth said, reading the cut edges. "The marks at Floor 105 were four days old. These are two days old." He looked at the symbol. "He's slowing down."
"Or he stopped here for a while," Kiran said. He studied the symbol's shape. He didn't know the symbol's meaning, but he knew where he'd seen a similar form: in the wound's biological language, the patterns the tissue's architecture produced in the walls of the organ system. Markos had called them navigation marks.
Marek had been in the wound long enough to learn navigation marks. Had continued past Floor 112 two days ago, leaving the notation as he went.
He was somewhere below Floor 112, below the wound's proximity threshold, moving through the deep ecology with fourteen months of Abyss biology on his skin and the wound's notation as his language and his grief frequency running at the highest amplitude the facility's monitoring array had ever recorded.
The wound would recognize him.
He stood with this. The wound recognized Marek. The wound had been maintaining the conditions for both of them.
---
At Floor 118, the Abyss stopped trying.
He noticed it the way he noticed environmental changes — incrementally, then suddenly, the pattern becoming clear only when the accumulated data crossed a threshold. They'd been navigating the increased entity density of the wound-proximity zone for three floors: entities at the edge of the caretaker code's range (not active yet at Floor 118, but the wound's biology starting to reach up), oriented toward the wound, moving at migration pace.
None of them had engaged.
Not because of the code — Floor 118 was below the code's range at this distance from the wound. Not because of any natural avoidance behavior — these entities were the hunting profiles, high-metabolic, the type that operated through direct engagement with anything in their territory.
They were in his territory. He was moving through it. They were not engaging.
He stopped at the Floor 118 chamber's center and stood still.
Daveth read his equipment. "Twelve entities in this floor. All within thirty meters." He looked at Kiran. "None of them are targeting us."
"Are they migrating?"
"No. They're distributed through the floor. Normal territorial spacing." He checked the display again. "They're just — not."
Not engaging. In a floor with twelve hunting-profile entities, at the depth below the sanity line, below the caretaker code's range.
"This floor," Kiran said. "What's the advance team's record on this floor?"
Daveth pulled the 38th's records from their descent. "High entity activity, hostile rating, team assessed as requiring caretaker code or significant combat to transit." He looked at the floor. "Twelve entities. The record says they bypassed this floor entirely on the way down."
They'd bypassed it. On the way down, the 38th had taken a different route because Floor 118 was rated hostile.
He was standing in Floor 118 and twelve hunting-profile entities were not engaging him.
"Is this the code?" Daveth asked.
"The code isn't active at Floor 118," Kiran said. "The wound is too far."
"Is it the void-skin? The biological signal from the wound's structure?"
"The floor entities don't recognize the wound's biology the way the deep-floor migrants do. The hunters are surface-ecology entities. They're not calibrated to the wound's signature." He looked at the nearest entity, eight meters away, not moving. "They just aren't engaging."
Daveth said nothing for a moment.
"That's been happening since we entered," he said. "The migration entities at Floor 65, not engaging. The hunters at Floor 78, moving around us. Floor 90's entities, which should have been the most aggressive floor in this section by the advance team's ratings—" He paused. "They moved away when we approached."
Kiran had noticed. He'd been noting the anomalies since Floor 65 and holding judgment and waiting for a sample size large enough to mean something.
The sample size was now large enough.
"Document what you're observing," he said. "Floor by floor. I need the data."
Daveth was already recording. "What are you thinking?"
"I'm thinking," he said carefully, "that the pattern is inconsistent with everything I understand about the Abyss's surface ecology below the sanity line."
"And the alternative understanding?"
He walked to the floor's lower seam entrance. The twelve entities maintained their distance. None of them closed.
"I'll tell you when I have more data," he said.
---
They reached Floor 140 at two in the morning.
The caretaker code's first activation at this depth was a relief — not because the code would stop things from happening, but because it was the sound of a familiar instrument coming in after playing without it for too long. The wound's biology in the void-skin responding to the wound's proximity, the broadcast frequency strengthening, the integration pocket's signal sharpening from thread-like to something real.
The floor was dense. Not the standard entity density of Floor 140 from fourteen months ago — triple, quadruple, the migrating organisms from the upper floors and the concentration of the wound-zone's attracted biology. They moved through the code's bubble of hesitation with the caretaker code running at full output and the two of them at the pace that maintained the hesitation radius.
At the floor's seam junction, Marek's marks were on the wall.
Not navigation notation. Personal writing, in plain surface script, cut carefully:
*Door is clearer from here. Frequency stronger. The wound is expecting something.*
Below it, in smaller cuts, almost an afterthought: *If you find this — go left at 155.*
"Left at 155," Daveth said.
"There's a secondary seam route on the left at Floor 155," Kiran said. "It bypasses the main junction and enters the organ system from the lateral connection." He looked at the writing. "Marek knows a route I didn't use."
"He's been here for fourteen months. Of course he knows routes you don't."
"He's also been in the wound's proximity recently enough to know what the wound is expecting." He stood at the junction and listened to the code's background frequency and thought about what the wound would be expecting if it had been running a large-scale test of grief frequencies for three days.
The wound was expecting something.
He looked at the floor's lower entrance. The deeper floors, the organ system, the wound's outer layers, the cavity under the deeper authority's construction.
The door.
The wound had been collecting frequencies. Testing. Building toward the right match.
He went left.
