Four entries in the witness log at relay one.
The first is from the artist. Bok Nalparam wrote it the morning he installed the log — a waterproof notebook wired to the relay housing, one instruction: Leave something if you were here but not here. His entry is a statement about fidelity and divergence, written in the language of someone who has spent four months turning a corridor into art.
The second is unsigned. Small, careful letters in ballpoint: I was here three times before it was here. The corridor knew me by my schedule, not my name. A ghost. Someone who existed in the corridor's rhythms before the corridor had a name.
The third is from the delivery driver. Kim, who walks the corridor twice daily to reach the loading dock at relay seven: The water fountain near relay three stopped working on the 14th. Nobody fixed it. A maintenance request. Infrastructure speaking in the language of infrastructure.
The fourth is signed.
Chae-Gyeol did not plan to write in the witness log.
She had passed it every Tuesday and Thursday since Bok installed it. She read the instruction. She read the unsigned entry and recognized the experience without recognizing the handwriting. She held the pen once and put it back.
She was not ready. The testimony she wrote at her kitchen table — after Jiyeon was asleep, in third person because first person felt like claiming — was for herself. Mitsuki's instruction. Write that down. Not for the corridor. For yourself.
The testimony she emailed to Mitsuki — with eleven photographs of her own handwriting surfacing in other people's work — was for one person. Not the institution, not the study. One person who understood what the corridor was before it was named.
The witness log is different. The witness log is for the corridor.
She writes on a Friday evening after her shift. The counter at relay four reads 119 — she still does not fully understand what it counts, but she understands it measures something about the distance between a place and its image. She has been living inside that distance since November.
I measured this corridor in clinic appointments before anyone measured it in art. I gave away every measurement I made. I did not keep copies. This is the only record I have written for myself in this space.
She signs it: Chae-Gyeol, social worker, Tuesdays and Thursdays.
Four entries. Four different kinds of presence.
The artist writes as an artist — framing, contextualizing, making meaning. His entry is a piece of the piece.
The ghost writes as an absence — anonymous, claiming only a schedule. Their entry is a confession.
The delivery driver writes as a user — the corridor is infrastructure and the infrastructure is broken. Her entry is a function.
Chae-Gyeol writes as a function too. Social worker, Tuesdays and Thursdays. She defines herself by the role that brought her here, the schedule that made her a regular, the professional identity that gave her access to every person and place in the corridor's story.
But she signed her name.
The ghost did not sign. The delivery driver signed with a surname only. Bok signed as the artist he is. Chae-Gyeol signed with her name, her title, and her schedule. Everything. The most identified entry in the log, from the person who has been the least identified in the corridor's history.
Eleven photographs of her handwriting in contexts she did not author. Clinical annotations that became gallery text. Intake form margins that became cached data renders. Directions on a napkin that became study appendices. Each transformation increased visibility and decreased function — her practical notes ascending into art, losing their original purpose with each step upward.
This entry reverses the direction. It is not practical — it serves no clinical function, documents no patient, enables no access. It is not art — it is four sentences in a waterproof notebook. It is the first thing Chae-Gyeol has written in this corridor that is neither professional nor repurposed.
It is hers.
She closes the notebook and walks to the clinic. The corridor is 340 meters long. She has walked it on Tuesdays and Thursdays since before anyone called it anything. The relay stations hum. The ventilation grilles make stripe patterns on the east wall when the afternoon sun hits them. The water fountain near relay three is still broken.
Four entries in the witness log. Four voices. An artist, a ghost, a driver, and a social worker.
The instruction says: Leave something if you were here but not here.
Chae-Gyeol was here. She was always here. She was here before here was anywhere. What she left is not a trace of absence. It is a declaration of presence — late, deliberate, signed.
The corridor does not change. It holds what people leave in it and lets them walk through.