Chapter 3 The Long Survey

Oskar Fehr did not sit down. He stood at the end of the bench with his hands still folded and looked at the closed core boxes the way a man looks at a bill he intends to pay later. "Director Rennard asked me to check on the K-7 run," he said. "She likes to know when the survey team finds something the model missed." "Then she'll be pleased. The model missed eleven meters of empty space." "Empty space is a strong phrase." Fehr's voice was mild and unhurried, the voice of a man who had never once in his life needed to raise it. "Ground-penetrating radar is a suggestive instrument. It suggests boundaries. Sometimes the boundary is a void. Sometimes it is a change in water content, or a fracture set, or an old compaction surface. The migration software has a habit of sharpening a soft return into a hard edge because a hard edge is easier to draw." "I ran the pass three times with three different migration settings. The edge moved by six centimeters." "Then you have an edge. You do not yet have a void." He turned his head slightly, taking in the bench, the cold rack, the closed boxes. "You also have a sample I should take to the central lab." "Which sample?" "The one you bagged separately. The colored seam." Delyth kept her face still. The bag was in the cold rack behind her, and the label was in her own handwriting, and no one had been in the room since she logged it. "The seam is mine until I finish the chain of custody. That's procedure." "Procedure allows for an accelerated route when a sample is anomalous. You flagged it anomalous, I believe. That is what the flag is for." He smiled again, and the smile did not move any part of his face except his mouth. "I am not confiscating your ice, Doctor Amaral. I am offering it a faster lab." "Then route the request through my supervisor and I'll release it with a signed transfer. Also procedure." For a moment something passed behind Fehr's eyes, quick as a fish under ice, and then it was gone. "Of course," he said. "You are right to keep clean records. Records are the only thing that outlives us out here." He left without asking to see the boxes, which told her more than anything he had said. A man who only wanted a sample would have asked to see the sample. Delyth waited until his footsteps had faded down the corridor, then shut the recorder off, pocketed the memory card, and went to find the colony's oldest data. The Long Survey was twelve years old and it was the closest thing Anseris had to scripture. Aphelion had flown it down before the first dome was sealed, a full geophysical sweep of the basin done from orbit and from the ground, and every survey since had been measured against it. The colony's whole water economy rested on its numbers. Where the ice was, how deep, how much, how long. Nobody argued with the Long Survey. Arguing with the Long Survey was like arguing with gravity. The archive terminal sat in a cold room off the main concourse, and Delyth had a mid-level access that let her read the public layers and, because she was a resource surveyor, the working layers beneath them. She pulled the K-7 sheet and let it fill the screen. At her coordinates the Long Survey showed bedrock. Hard, continuous, unremarkable. But in the margin of the sheet, where the surveyors had written their field notes, there was a line in the cramped hand of the original team: *K-7 south: seismic return consistent with void or fracture. Recommend priority coring before infrastructure commit.* And then, struck through with a single clean stroke, in a different ink: *Resolved. Bedrock nodule.* Two hands. Two answers. The second one had won. Delyth sat back and let the cold of the room reach her through her jacket. Twelve years ago, the first surveyors had found the same thing she had found, and someone had crossed it out and written a smaller word underneath. She had spent a year trusting a document that had been edited before she ever read it. She pulled the revision history and read it the way she read everything, from the bottom up. The file had been touched nine times since it was filed. Most of the touches were ordinary housekeeping, the kind of edit a survey office made a hundred times a year. Three of them were not. Three of them had replaced the anomaly note with the nodule note, and then the nodule note with nothing, and each of the three had been made in the same minute of the same day of a different year, by an account whose author field had been left blank. An account with no name and a habit of working on the same four paragraphs every few years, like a gardener keeping a bed weeded. "Blank," she said out loud, to the empty room. "Of course it's blank." She spent the next two hours pulling every survey that had ever crossed K-7, and the pattern she found made the cold in the room feel personal. The sector had been surveyed four times in twelve years. Each survey agreed with the one before it in every respect except one: the anomaly. The first survey noted it. The second survey omitted it entirely, a hole in the record where a hole in the ground should have been. The third survey restored it, but relabeled it as a mineralized vein, harmless and boring. And the fourth survey, the one served to her department as current, did not mention it at all. Someone had been editing the ground for a decade, one filing at a time, keeping the truth small enough to carry. She had spent her whole career trusting the archive. It was the one place on Mars where the ground and the record were supposed to agree, and now she could feel the agreement coming apart under her hands like two plates of ice shifting. If the record could be edited, then every map she had ever drawn was a statement about the archive as much as a statement about the rock, and she had never once, in fifteen years, had to make that distinction. She did not like the shape of the thought. She wrote it down anyway, in the margin of her notebook, and put the date on it, and told herself she was being thorough, which was true, and that she was frightened, which was also true, and that the two had never once in her life been separable. She stayed in the cold room until her fingers ached on the terminal and the corridor outside had gone quiet, and when she finally stood up, the archive had closed for the night and the lights in the concourse were down to their sleep setting, a low amber wash that made the domes look like the inside of a lamp. She made copies. She was not supposed to make copies of working-layer files, and she made them anyway, and she did it the slow way, one record at a time, so that no single transaction would look like a theft. The whole operation took her forty minutes and left her hands unsteady in a way that had nothing to do with the cold. When she finally stepped back into the warm corridor, her wrist chimed with a message from Sabra. *Night shift reassigned. I'm on Godwit now, eastern pad, 22:00-06:00. Tell me you didn't do something.* Delyth stopped in the middle of the corridor and read it twice. Sabra had never been on night shift in two years. Nobody moved a foreman to nights in the middle of a season without a reason, and the reason was standing in a lab right now, folding its hands and calling it procedure. She typed back with her thumb, standing very still while colonists flowed around her on both sides. *I didn't do something. I found something.* A long pause. Then: *Then stop finding things until I get back.* Delyth put the phone away and walked home, and the corridor lights came up around her one section at a time, exactly as they did every evening, exactly on schedule, and she had never before noticed how much an on-time light could feel like being watched. ---