Survey Officer Petra Anselm recorded the ambient temperature at the threshold as fourteen degrees, same as the previous six mornings, and wrote it down.
The reading that didn’t fit was the luminosity index. It had climbed four points overnight with no corresponding change in the door’s position, the season of the world beyond, or anything she could explain. She ran the calibration sequence a second time. The instrument gave her the same number.
She noted it in the margin, flagged it with a small asterisk, and moved on to the pressure differential.
Senior Survey Officer Carden was already through the threshold, setting the second transect line. He did this every morning at first light: went ahead alone, measured, came back. Anselm had worked two postings before this one and she had learned to read a senior officer by the way they came back through a door. Carden came back quietly, without urgency, which meant the world on the other side was behaving. She had not yet learned what it looked like when it didn’t.
She finished the perimeter readings and checked the seal notation on the staging shelter — still holding, no drift — and then she sat down at the field table with the twelve days of data they had accumulated.
The world on the other side of Door 7-Amaranth had a name already, which was unusual. The previous survey had given it one before filing their recommendation as Contested and stepping back. The name was Cordis. The previous team had disagreed about it so severely that the Compact had voided their filing and sent a fresh pair, and here Anselm was.
She was twenty-six. Carden was forty-one, which was old for field work. He did not seem to feel this.
He came back through the threshold at half past seven, folding the transect line over his forearm the way you’d fold a garden hose, and set it in the equipment bin. His jacket had the faint amber tint everything acquired after a few hours on Cordis — something in the particulate, Anselm had written in her notes, likely vegetable in origin, does not penetrate fabric or skin, appears cosmetic only. She had not yet stopped noticing it.
“Second transect holds,” he said. He looked at her flag on the log sheet. “Luminosity again?”
“Four more points since yesterday.”
He stood there reading the column. He had a way of going still when he was thinking that she had begun to rely on. It meant he was taking it seriously and would tell her when he was done.
“Local day is forty-one hours,” he said. “We’ve been measuring at the same point in each Cordis morning. If the angle of incidence shifts across their year—”
“Their year is six hundred and twelve days. We’ve been here twelve.”
“Yes.” He set the log down. “Note it. We’ll add a measurement at local noon.”
“I did note it.”
“I know.”
He put the kettle on the camp stove and they waited for it. Outside the staging shelter the door stood in the grass, which was not grass exactly — closer to a dense, low sedge, and that amber color again, though here it looked intentional, like a choice the world had made about itself. Cordis had no large fauna that they had encountered. It had, as far as Anselm could determine, no inhabitants at all, which was the problem.
The previous team had recommended Open. Then one of them had changed her mind and recommended Seal, and the other had refused to amend the filing, and the Compact had been left with a document that contradicted itself in the summary paragraph, which was not a thing the Compact’s filing structure technically permitted.
Anselm poured the water. Carden accepted the cup and sat down across from her.
“I want to walk the northern reach today,” he said. “The area where Solis and Okafor disagreed.”
“The structures.”
“The possible structures.”
That was the question. Solis said the formations in the northern reach were natural — sedimentary, she’d argued, columnar jointing, she knew what she was looking at. Okafor said they were built. Okafor said someone had lived on Cordis, or someone still did, and that recommending Open without resolving the question was an act of bureaucratic cowardice he declined to participate in.
Anselm had read the testimony three times on the transit out. She had tried to form an opinion before seeing the structures herself and found she couldn’t.
“We have the macro-lens kit,” she said.
“We’ll take it.” He drank his tea. “If they’re built, we file Quarantine and the Compact sends a xenology team. If they’re natural, we file Open with a luminosity note and some poor licensing clerk has twelve doors named Amaranth to sort out.”
“And if we disagree.”
He looked at her over the rim of his cup. It was not a long look.
“We don’t,” he said.
She wrote north reach survey, macro-lens, depart 0830 in the day log, and flagged it with nothing.