He went back Saturday night.

  Same route, same time, same alley. The Row behind him doing its late evening thing, loud enough to be useful. He moved through the alley without a lamp and let himself in through the back door the same way as before, the lock opening in under a minute, the dark inside the same dark as last time.

  He stood in the doorway and listened.

  Nothing.

  He went up the stairs.

  The room was the same. The dust patterns were the same. Nobody had been here since him, or if they had they had been careful enough to leave no trace, which was possible but would have required a level of care that left its own kind of impression and this room did not have that impression.

  He went to the corner.

  Lifted the boards in the same order.

  The box was there.

  He looked at it for a moment. The dark stone, the carved script, his father’s name in a language he had been teaching himself in stolen hours at a secondhand text market for months without knowing this was why.

  Return to sender.

  He reached in and picked it up.

  It was heavier than it looked. Not unreasonably, not supernaturally, just the specific density of stone that had been worked carefully, the weight distributed evenly in both palms. The surface was smooth except for the carving on the top. No seam anywhere he could find. Whatever was inside was inside completely, sealed in a way that had no visible mechanism.

  He held it and felt for it with his mana the way he felt for things with his mana now, the Challenger pool reaching out in the way it had learned to reach, looking for the shape of what was there.

  The box pushed back.

  Not aggressively. Not painfully. More like pressing your hand against a wall and the wall pressing back with exactly the same pressure, a perfect and immediate equilibrium that was clearly not passive. Something in the box was aware of the pressure and was matching it.

  He held the contact steady and waited.

  The box held the contact steady and waited.

  They stayed like that for a moment, Zelig and the box, in the dark second floor room of a building that had been closed since before he was born, having what was technically a conversation through the medium of applied mana pressure.

  Then the box did something he had not expected.

  It got warmer.

  Not hot. Not burning. The specific warmth of something that had been cold for a long time and was remembering what warm felt like. It moved through his palms and into his wrists and up his forearms and settled in his chest beside his mana pool like it was looking for somewhere familiar to rest.

  And then the carving on the top began to glow.

  Faint, the same faint purple as the Metarealm sky, barely visible in the dark room but unmistakably there. The script lit up letter by letter, not his father’s name but something beneath it, a second line of text he had not seen before because it had not been visible before, hidden under the surface of the stone until whatever condition required to reveal it had been met.

  He read it.

  It took him a moment because his Eastern script was still imperfect and the dialect was older than anything he had studied. But he read it.

  It said: the key finds the lock when the blood finds the key.

  He stood very still.

  The blood finds the key.

  His blood. His father’s blood in him, the half of him that was Yegmet Challots, god of the unknown, which had apparently been sufficient for the box to register and respond. He had not known this would happen. He had not known there was a second line of text. He had not known the box would warm in his hands like something waking up after a long time asleep.

  You could be reading stolen content. Head to Royal Road for the genuine story.

  He had not known and the box had not cared what he knew. It had just responded to what he was.

  The glow faded after a few seconds, the text disappearing back into the stone surface. The warmth remained, lower now, a background thing, the box settled in his hands like it had been waiting for exactly this.

  He put it inside his jacket.

  He replaced the floorboards.

  He stood up and looked at the corner for a moment.

  Then he went downstairs.

  He was at the back door, hand on it, when he heard something.

  Not inside the building. Outside, in the alley. The specific sound of someone who was being careful about the sound they were making, which paradoxically was easier to notice than someone not being careful, because care had a texture to it that casual movement did not.

  He stood at the door and did not open it.

  He pushed a thread of mana through the gap at the base of the door the way he was learning to push mana through gaps, thin and low, feeling for warmth and presence in the alley beyond.

  One person. Standing. Not moving. Positioned to the left of the door where the shadow of the building was deepest.

  Waiting.

  He had been followed here. Not tonight, he had checked twice on the way and was certain he had been clean. Which meant he had been followed on the first visit, the building noted, and someone placed here tonight to watch it.

  He stood at the door and thought about this for a moment.

  One person waiting in an alley was a surveillance position. It was not a capture position. A capture position required more than one person and covered the exits. This was someone watching, which meant Stillson did not know yet what Zelig had found or taken. He just knew someone had been here.

  Zelig looked at the door.

  Going out the back meant walking past the watcher. Not ideal. The watcher would follow him. That was the job. He would follow him and find out where he went and report back and Stillson would know where Zelig lived.

  He thought about Marie.

  He thought about 37 Arbor Street and the loose floorboard where the savings were and the sound of Marie’s needle going in and out of fabric and the specific smell of the room they had lived in together since he was ten years old.

  He could not lead this back to Arbor Street.

  He stood there working through it quickly.

  Option one, go out the back, lose the tail in the Underlayers, circles and doubling back, the Row was useful for this at this hour. Possible. Not certain. A good tail in familiar territory was hard to shake.

  Option two, go out the front, which the watcher in the alley was not watching, move through the Row at normal pace, let the crowd do the work, get far enough from the building before the watcher realized the back door was not going to open.

  He went to the front.

  The boards were nailed from the outside. He pushed mana into the nails, the same principle as the lock, feeling for the structure, finding the grip of each one in the wood and loosening it carefully. Three nails, two minutes. The board came away from the inside with a sound he kept controlled, slow and quiet, and he slipped through the gap and pressed the board back into place as closely as he could manage.

  He was on the Row.

  He straightened up and put his hands in his pockets and walked.

  He walked the Row at the pace of someone with somewhere ordinary to be. Not fast, not slow. He passed the fish stall, closed at this hour. Passed the glow lantern that was always buzzing. Passed the corner where the hot stall was, also closed.

  At the end of the Row he turned right and walked two streets east and then doubled back through the market alley, the one that smelled like old vegetables and connected the Row to the residential streets behind it.

  He stopped at the midpoint of the market alley and waited.

  Two minutes.

  Nobody came through behind him.

  He waited another minute.

  Nothing.

  He moved on.

  He took four more turns he did not need to take, each one watched from the other side, each one clean. By the time he was certain he was alone the box in his jacket had settled fully against his chest and was doing the low warmth thing continuously, a background presence he was already getting used to the way you get used to things that are new and persistent.

  He was three streets from Arbor Street.

  He stood on the empty street and thought about the watcher in the alley.

  The watcher had not followed him out the front because the watcher had not known he went out the front. But the watcher knew someone had been in that building. When he reported that the building had been visited and the back door had not opened, Stillson would know the person had not come out the back. He would put together the front. He would think about who might have known that building well enough to know there was another way out.

  He would think about who in the Underlayers had been watching that building.

  Zelig had been watching it. He had been standing on the Row looking at it, more than once. Not conspicuously. But Stillson’s people had been in the Underlayers long enough to have their own observations, their own sense of who paid attention to things they should not pay attention to.

  The timeline had shortened.

  He walked the last three streets to Arbor Street and went upstairs.

  Marie was asleep.

  He sat at the table with the box in front of him and looked at it in the lamplight, the dark stone, the carved text invisible now on the surface.

  The blood finds the key.

  The key finds the lock.

  He did not know what the lock was yet.

  He put the box back inside his jacket and kept it there, against his chest, the warmth of it a steady low thing in the dark room.

  Outside on the street below, a sound.

  Footsteps. Unhurried. Passing the building and continuing on.

  He listened until they faded.

  Then he listened to the silence after them for a long time.

  He thought about the watcher in the alley and Stillson sitting somewhere in the Middling Ring receiving a report and the particular patience of a man who had been searching for something for a long time and had just found out someone else had found it first.

  He thought about what came next.

  What came next was coming whether he was ready or not.

  He looked at the ceiling.

  He thought: ready.