By the time the harbor lamps had shrunk to three weak smears behind the breakwater, Frederick had checked the resonance needle six times and sworn at the sea in three different technical categories.
That was useful.
Panic from Ezekiel would have been expected. Panic from Frederick meant the water was misbehaving in ways worth respecting.
Void stood near the stern with one hand on the wet rail and watched the route open beneath them.
The launch was too small for what Frederick had loaded onto it. Descent cradle lashed amidships. Battery frame tied down with doubled rope. Depth reel bolted beside the mast step. One spare chest of hooks, clamps, and metal teeth that smelled of oil and old hands. The deck should have felt clumsy under that weight.
Instead it felt light.
The sea kept lifting the hull from below in short wrong surges.
"Port two points," Frederick said.
Ezekiel blinked spray out of his eyes and hauled the tiller over.
"It was starboard a moment ago."
"A moment ago the water had manners."
The bow swung. Not enough.
Frederick was already on the reel, feeding line over with one hand and steadying the brass compass with the other. The black needle above the battery ring jerked north-east, south, then north-east again so sharply it tapped the stop twice.
"Father."
"If you have discovered a better instrument, now would be a fine time to mention it."
"I discovered my shoulder is still attached badly."
"Then favor the other one and keep the bow where I told you."
Void let the exchange pass over him.
The prison alarm still carried faintly from the city behind them. Not the bells now. Only the aftereffect. Search patterns. Quick boats loosed into nearer channels. Men who still thought pursuit could solve what had happened under the arena.
The route ahead mattered more.
Frederick had found it by craft, stubbornness, and failure, which put him ahead of most of the world. He had not found its current shape. The damage spreading through this region had done that for him.
Cold lifted through the deck in narrow pulses.
Not ordinary night chill. Not deep-water runoff.
The seam below them distorted pressure, current, and worked metal in the same uneven rhythm Void had followed from the arena. The launch crossed one of those pulses and the iron nails along the port bench gave a soft ticking answer.
Ezekiel heard it and looked down at once.
"That sound again."
Frederick did not look up.
"Describe it properly."
"Metal in a bad mood."
"Useless, but not inaccurate."
He braced both boots, leaned over the reel, and let another measure of line slip into the dark. It should have gone straight. Instead it curved under the hull toward open water, tugged by a pull that had nothing to do with tide.
Frederick went still.
That, more than the swearing, was the first real warning.
"How far off?" Void asked.
Frederick glanced at him once. He had stopped asking who Void was in the simple mortal sense. Good. That question had limited use.
"Half a watch by the old route," he said. "Less, if the line is lying. More, if the sea is."
"Which is it?"
"Yes."
The launch climbed a swell that should have broken under them and did not. Water rose black and smooth along the starboard side, high enough to soak Ezekiel to the ribs, then passed on without foam.
Ezekiel spat seawater and twisted around.
"I hate this route."
"You've been on it twelve minutes," Frederick said.
"That was enough."
Void looked past them, out over the long dark plain of water.
The surface seemed empty to mortal sight. It was not. Shapes moved below in patient arcs, large enough to displace pressure before they displaced water. Creatures born near lawful spill did not always grow stronger. Many only grew stranger. These had learned to follow the seam because other things died near it first.
One of them turned toward the launch.
Frederick saw nothing yet. Ezekiel saw only the change in Void's attention and stiffened at once.
"What."
"Keep your voice down," Void said.
"That was down."
"Lower."
Frederick followed the line of Void's gaze, then the wake, then the absence in the wake.
The water behind them had gone too flat in one long moving bar.
He swore once, very quietly.
"Ezekiel. Leave the tiller. Take the battery brace."
"What about the boat?"
"It will still be in the water if you move fast enough."
Ezekiel stumbled aft, caught the mast stay with his bad shoulder, hissed, kept moving. Frederick was already at the cradle, checking the lashings again with fingers that had started thinking faster than the rest of him. The launch did not have the size for a fight and did not have the men for one.
Void pressed two fingers against the wet rail.
He did not release force. That would have been easy and stupid.
Instead he narrowed his presence until it lay across the hull in a thin cold span, thinning the launch's sound, scent, and drag against the seam. The thing below them rose another few yards, testing. The launch answered with silence where there should have been vibration.
For a breath, the creature lost them.
Then the seam below lurched sideways and Void had to move the concealment with it.
He felt the route answer in the dark, not with thought but with stress. One harder intervention and everything feeding along this stretch of water would know exactly where the launch stood.
The bar of flat water drifted past the stern and slid away into the night.
Ezekiel let out the breath he had been saving like spare coin.
"Was that one?"
"Yes," Void said.
"One what?"
"A reason to keep working."
Frederick looked over at him sharply.
"How many of those reasons are in this water?"
"Enough."
Frederick accepted that with less complaint than most men would have shown. He drove the butt of a wrench against the cradle brace, listened to the note it gave back, and nodded once to himself.
"Good," he said. "Large enough to matter and too large to help. I can work with that."
Ezekiel stared at him.
"You can work with that?"
"What did you think I brought the cradle for?"
"Normal research."
"Then you deserve the sea."
Another pulse ran up through the hull.
This one hit harder.
The resonance needle slammed east. The compass spun once. The launch lurched sideways as if some buried hand had yanked the keel toward deeper dark. Ezekiel lost footing and crashed into the battery frame. Frederick hit the mast with one shoulder and swore at several principles of construction in rapid order.
Void caught the cradle before its weight could break loose and take the deck apart.
Wood groaned under his grip.
The pull beneath them intensified for three breaths, four, then released all at once. The launch dropped into ordinary chop hard enough to knock water over the bow.
Ezekiel came up coughing.
"That felt expensive."
"It will be, if the brace is bent," Frederick snapped.
He crossed the deck on hands and boots, checked the frame where Void held it, and stopped.
The iron had bowed a finger's breadth. No more.
No man on the boat had the strength to have stopped that by hand.
Frederick looked at the bent brace, then at Void, then back to the brace as if hoping the metal might explain itself.
"Can you keep doing that?" he asked.
"Not carelessly."
That answer pleased Frederick more than a boast would have.
He shoved himself back upright and put Ezekiel to work at once.
"Reel line in. Slow. If you tear your hands open, don't bleed on the battery."
"That sounds like a very specific mistake."
"Because it is."
Ezekiel began cranking.
The line came back colder than it had gone out. On the third turn it vibrated under his palms like a plucked wire.
"Father."
Frederick grabbed the wet length, pressed it against his wrist, and went still again.
"No."
"No what?"
"No shelf."
He hauled the last span over the rail. The lead weight on the end was scored white and rimed with a thin crust of frost.
Ezekiel stared at it.
"That went into seawater."
"So did you," Frederick said. "Try not to take it personally."
He looked over the side, then ahead, then at the needle. The harbor was gone now except for a dim rust-colored glow under the clouds behind them. Open dark in every other direction. Swell, wind, and star-line should have agreed on the shape of the water.
They did not.
Frederick set the weight down very carefully.
"The route moved."
Void had known that before they left the quay. Hearing Frederick say it mattered more.
"How far?"
"Far enough that the old descent point is dead." Frederick licked salt from his lip without noticing. "The notes still hold the pattern, though. Not the place. The pattern."
He moved to the bench, reset the needle ring by hand, then shifted the battery clamp until the black pin quivered between north-east and straight north.
"Ezekiel. Bring the second marker rope."
"The red one?"
"No, the other second marker rope."
Ezekiel found the red rope.
Frederick took it, fed one end through a guide eye on the cradle frame, then pointed into the dark water off the bow.
"Watch the surface there."
"I can't see anything there."
"Exactly. Keep watching."
At first Void thought Frederick was testing him. Then the water ahead gave the smallest answer: a circle no wider than a wagon wheel where the chop flattened, not smoothly like the passing creature's wake, but all at once, as if the surface had forgotten wind for the space of a single breath.
Then it happened again twenty yards farther on.
A path.
Not marked by buoys, lights, or depth.
Marked by brief failures in ordinary motion.
Frederick saw Ezekiel understand it and nodded once, short and sharp.
"There. Hold us to that."
"That is not a route. That is the sea making up its mind badly."
"Same thing tonight."
Void moved to the bow at last.
The next flat patch formed and disappeared before Ezekiel could correct to it. The one after that split in two. The route was widening, yes, but also fraying at the edges. Frederick had found something true. Time had made it worse.
Below the moving surface, the actual threshold waited.
It was deeper than the launch, deeper than Frederick's previous notes, and not entirely beneath the water anymore. Space had thinned there. Void could feel the first plane pressing against the mortal world through it.
He also felt something else.
Attention.
Not from the sea-creatures now.
From the seam itself.
"Steady," he said.
Neither dwarf liked the tone enough to argue.
Frederick eased them forward by the false path of still patches and wrong current. Ezekiel held the tiller with both hands and stopped trying to hide how frightened he was. The launch entered a stretch of water where even the hull noise changed. No slap under the planks. No hiss along the sides. Only a low drawn sound from far below, like metal under load.
The descent cradle rings answered it in sympathetic hum.
Frederick's face went pale with concentration rather than fear. Better than panic. Worse for stopping.
"Void," he said quietly, eyes fixed on the black water ahead. "Tell me now if this is the part where the boat ceases to be a boat."
"Not yet."
That yet cost Ezekiel more visibly than a lie would have.
The dark ahead opened.
Not with spray. Not with a wave.
The swells simply failed across a long oval patch of water, leaving a smooth black field where the stars reflected too clearly and too deep. Frederick lowered the frost-scored lead again. The line ran out fast, then faster, then snapped taut with no bottom at all, angled into darkness where ordinary sea-depth should still have existed.
He did not need to say it. He did anyway.
"That wasn't there before."
"No," Void said.
Ezekiel swallowed.
"Can we turn back?"
Void looked at the seam, the ruined route, the launch suspended above a place where one world had started giving way to another. Then he looked at Frederick's hands on the reel and Ezekiel's white grip on the tiller.
"Not cleanly," he said. "We're already on it."