"That path wasn't there yesterday."

  You said this the next morning, over the fire, with the forced calm of someone who had spent the night processing. Your conclusion you were now delivering as if it were a weather observation.

  "Then you weren't looking," I said.

  The lie came out cleanly. Automatic. A denial the mouth produced without requiring the mind's permission. I said it because it was what one said to keep the world intact a little longer. Plaster over a crack.

  You knew I was lying. The compression of your features — the not-smile that indicated processing-plus-amusement — told me you knew. You wrote in your notebook. Then you tried something.

  "There should be a bridge here," you said.

  You said it to the stream we were crossing, a shallow stream, ankle-deep, the kind that did not require a bridge but would have been more convenient with one. You said it with the intonation of someone performing an experiment, the deliberate application of a hypothesis to a test condition.

  Nothing happened. The stream remained a stream. The banks remained bridgeless.

  You shrugged. "Worth testing."

  You stepped into the stream. The water immediately invaded your boots. You made a sound: not a word, a sound, the involuntary vocalization of someone whose feet had just been informed that the water was colder than the water looked. Your face achieved the expression of a man who had been personally betrayed by a stream.

  I said nothing. But I watched you wade. Both boots. Full immersion. You cursed your way across with the systematic thoroughness I had come to recognize as your response to the universe's indifference.

  But I was annoyed.

  The annoyance was not at your failure but at your attempt. At the presumption that the thing with the path was replicable by anyone, that whatever mechanism had produced the retroactive path was a technique rather than a condition.

  I was frustrated. At your testing and at the stream and at the fact that we were ankle-deep in cold water because there was no bridge and the movement produced an accumulated irritation distinguishable from the background stillness. This should be easier.

  Minutes later — we were through the stream, climbing the far bank, you wringing water from your lower robes because your broken core didn't deflect moisture the way mine did — a path appeared.

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  Not where the stream was. Ahead. Through a dense section of undergrowth that should have required detour. A path. Narrow. Old-looking. The retroactive presentation with worn edges, compressed earth, growth patterns indicating years of existence.

  And on the path — stood a cairn.

  Three flat stones. Stacked. Mossy. The kind of trail-marker that travelers built at intersections to indicate direction, the navigational shorthand as old as walking itself. Three stones. Moss. Old.

  The moss was real. I could feel it from here. Established growth, organism-on-stone that had been accumulating for years. The moss was years old. The stones were years old. The cairn was years old.

  The path had not existed ten minutes ago.

  You stopped. You stared at the cairn. Your face — I looked at your face, for the first time deliberately since your arrival — was pale. Not afraid. Not confused. Pale in the way of someone whose understanding of the world had just been revised by evidence you could not deny.

  You opened the notebook. The pen moved. Fast. Filling margins, cramming observations into the miniature script that fit more per page than seemed possible. Capturing the observation before the observation could be questioned, before the mind could intervene with explanations more comfortable than the truth.

  You wrote because writing was proof. If it was written, it was real. If it was real, it was not imagined. The cairn was written. The cairn was real.

  "It's tied to you," you said. Not a question. "The trees. The shadows. The paths. They're tied to your frustration."

  I did not confirm. I did not deny. I stood on the path that was years old and minutes old and looked at the cairn that was moss-covered and new and looking was the confirmation that I did not vocalize.

  "Not your wishes," you said, writing. "Your frustration. I wished for a bridge. Nothing. You were frustrated about being slowed. Path." You looked up. "Is that correct?"

  The analytical precision — I recognized it. You were doing science. To me. To the reality that I apparently produced when I was sufficiently irritated.

  I had been studied by scholars before. Dozens of them, across centuries. None of them had ever thought to test the scenery.

  "I don't know what that is," I said.

  True. Not a lie. The path, the cairn, the retroactive insertion of geography into a timeline that had already happened — I did not have a framework for this. I had frameworks for most things. Millennia of frameworks. This was outside all of them.

  "But it happened," you said.

  I said nothing.

  You looked at the cairn one more time. Then you touched it — your hand on the mossy surface, the tactile verification that confirmed solidity and temperature and the physical reality of an object that should not exist in the timeline it claimed.

  The moss was real under your fingers. The stone was cold. The path was worn.

  "I'm going to document everything from now on," you said. "Every anomaly. Every path. Everything."

  "You already document everything."

  "More."

  You closed the notebook. We moved. On the path that was old and new. Both of us knew. Neither of us discussed it. The agreement was silent. This happened and we continue.

  The cairn remained behind us. Three stones. Mossy. Years old. Minutes old. Real in a way that expanded the definition of real.

  The forest absorbed us. Behind us ley the evidence, proof of the impossible. Ahead of us was the question of what else was possible when the person doing the moving was the kind of person whose frustration edited geography.

  The question was not mine. The question was yours. I had the frustration. You had the question. The division of labor established itself the way everything between us did — without discussion, through proximity.

  You had questions. I had answers I didn't want.

  The path continued.