The camera found the tent at 11:43. For several seconds, Catalina thought the orange shape was a fault in the image. Water had frozen along the lens housing during the descent, leaving a translucent crescent across the lower half of the screen. Beyond it, the lamp illuminated pale ice, suspended particles, and something that could not belong beneath a glacier.
“Stop there.” Nicolás took his thumb off the winch control. The image swung gently. They stood shoulder to shoulder inside the drilling shelter, their parkas brushing whenever either moved. A small heater pushed warm air against Catalina’s right boot. Her left foot had been numb for twenty minutes. Above them, the fabric roof snapped in the wind, shedding crystals onto the equipment cases.
Nicolás leaned closer to the monitor. “Survey marker?” “At that depth?” “Something from the borehole.” Catalina glanced at the depth counter. Sixty-three point four metres. The drill log lay open beside it. She had signed every recovered section herself. “Rotate the head.”
The camera turned. Light travelled over a curve of orange material, a black seam, and a short length of aluminium tubing. Neither spoke. The fabric sagged between two poles. Along its lower edge, a narrow ridge of frost had formed a white fringe. One guy line disappeared beyond the light. It was a tent.
Nicolás reached across her and wiped the monitor with his sleeve, as though the problem might be on their side of the glass. “Could there be an old access shaft?” “Possibly.” It was the correct answer. They had surveyed a limited area. A buried opening might lie beyond it. Someone could have descended from elsewhere, years or decades earlier. She held onto that explanation while Nicolás lowered the camera another half metre.
The roof of the tent moved upward through the frame. A dark rectangle appeared on its side. “Bring it closer.” “That’s all the lateral movement we have.” “Use the zoom.” He did. The rectangle resolved into a sewn patch: white mountain, blue line, six small stars. Below it were the words PROYECTO SARMIENTO. Nicolás looked down at his sleeve. The same patch was stitched to his parka.
The heater’s fan rattled. Catalina could hear a loose bearing ticking inside it, a small sound she had stopped noticing days ago. “How many of those patches did we order?” she asked. “Twelve.” “Were there samples?” “I don’t know. Catalina—” “Did the supplier put the design online?” He turned towards her. “The design isn’t the problem.”
On the screen, just beneath the patch, a pale strip crossed the fabric. A repair. Nicolás bent over the controls and increased the contrast. Three overlapping pieces of tape came into view. The longest had been cut at an angle. Another lay almost perpendicular to it, making a crooked cross. Catalina remembered him fixing their spare tent on the floor of the equipment room. He had caught the fabric on a shelving bracket while unpacking. Rodrigo had made him test the repair outside. That had been four days ago.
“Get Rodrigo,” she said. Nicolás did not move. “And ask him to check the spare tent.” “It’s in storage.” “Then he can check it quickly.” He picked up the radio, gave their call sign, and waited. Static filled the shelter before Rodrigo answered. Catalina kept watching the screen. The camera was still turning by a fraction of a degree each second, releasing tension from the cable. The repaired panel drifted left. A partly open entrance emerged from shadow.
Something lay across it. At first she took it for a mitten. Then the light reached the wrist. The hand was bare, palm upward. Its fingers had curled slightly, as though waiting for an object someone had promised to place there. A cord bracelet circled the wrist. Two dull metal beads rested against the skin. Nicolás lowered the radio.
Behind them, the shelter door opened and Andrés stepped inside carrying a flask under one arm. “Rodrigo says you wanted—” He stopped when he saw their faces. Catalina moved aside so he could see the monitor. For a moment the only movement came from the camera, slowly turning above the hand. Andrés set the flask down. “Can you sharpen that?” Nicolás adjusted the focus.
One of the beads had a flattened side. The cord between them was dark, worn almost smooth. Andrés pulled off his right glove. Catalina had seen his bracelet hundreds of times. His daughter had made it before his first Antarctic deployment. He had repaired the knot twice and refused to replace the cord. He held his wrist beside the screen. Outside, Rodrigo came over the radio. “I’m in storage. The spare tent’s here. What exactly am I checking?” No one answered him.
Catalina took the radio from Nicolás. “The repaired panel. Describe it before you handle anything.” Rodrigo took a moment. She heard a door close at his end, cutting out the wind. “Three strips. Long one slants toward the door seam. Short one crosses it.” “Is the tent in its bag?” “Out on the shelf where we left it to dry. I can see the whole panel.” “Has the repair lifted?” “No.”
“Thank you. Leave it there. We’ll photograph it.” Catalina set the radio beside the drill log and wrote 11:43 in the margin, followed by Rodrigo’s report and the time of his call. She wanted to look again at Andrés’s wrist. Instead she looked at the recorder indicator. It was still red. “Nicolás, how much of this do we have?” “Everything since the camera entered the borehole. The recorder’s running locally.”
“Leave it running until the camera is out. Then make two copies of the raw file on separate drives. No cropping, no sharpening saved over the original.” “I know how to keep a source file.” “I know you do.” She heard the edge in her own voice. Nicolás checked that the cable brake was holding and pulled a clean label from his case. He wrote the date, camera identifier and start time on it without being asked.
Andrés put his glove back on. “Breathe, Cata.” “Please don’t manage me.” “All right.” He moved the flask farther from the controls, where someone might knock it onto the recorder. That was his answer to being told to stop helping. Once, Catalina would have thanked him for noticing the risk. Now she could not find a way to do it without acknowledging the other thing.
She pointed to the screen. “We have a tent with our insignia and a repair that resembles yours. We have a hand wearing a similar bracelet. We don’t know who put them there or when.” Nicolás followed her finger to the entrance. “You can say ‘a hand,’ but you can’t make it less of a hand.” “I’m not trying to.” She looked again at the pale fingers. “Not yet, anyway.”
They withdrew the camera slowly. Nicolás called out each cable mark while Catalina watched for a change in the image that might show where the cavity ended. At sixty-one metres the tent vanished behind a bank of ice. At fifty-nine, the lamp showed only the drilled wall. No second opening appeared, but the camera could not see behind that bank. Catalina made herself write that limitation down. She had designed the survey to locate warm water and unstable ice, not to search every direction for a human-made shaft.
By the time the camera reached the surface, the wind had shifted. It pressed against the shelter door as they carried the sealed recorder case and drives to the main module. The station stood on rock below the glacier, with its equipment room on the route between the drilling shelter and the heated mess. Catalina could see the storage-room window bright with afternoon sun. Rodrigo’s report had come from there, not from the buried cavity. She found herself needing to establish even that.
Nicolás transferred the recording at a table in the small lab while Catalina watched the file sizes complete. He disconnected the first drive, attached its label—UNTOUCHED MASTER, camera survey, date and time—and put it in a padded case. The second copy went onto a separate drive for examination. He opened the working copy and checked three points against the recorder: the descent, the patch, and the hand. Only then did Catalina let him stop recording his steps in the log.
“If you want a third copy, say so now,” Nicolás said. “Two independent ones before we start working. A third after we verify them.” “That’s what I was going to suggest.” He offered a tired grin. “Good. I’d hate for my job to become mysterious too.”
In the mess, Vera arrived with a sample tray she had not yet put away. Nerea brought her field notebook. Rodrigo came from storage after photographing the spare tent with a ruler beside its repaired panel. Andrés brought the flask and six cups, though only four people took one. They watched the working copy on Nicolás’s laptop. On the second replay, no one asked him to pause at the patch. On the third, Nerea did.
“A supplier could have made more,” she said. “They had the design. Give me an afternoon and I could arrange a tent with that patch.” She touched the edge of the laptop, not the screen. “The repair is worse, but someone saw our spare when we tested it.” “Someone would still have to get a tent down there,” Rodrigo said. “That’s the part I care about.”
“An old access shaft,” Catalina said. “The grid doesn’t cover the entire slope.” Rodrigo nodded. “Maybe. Before anyone descends, I want the cavity dimensions, the roof thickness above our opening, and a second anchor away from the drill rig. If that fabric is against the wall, we don’t know what supports the space beside it.” He set his photographs next to the laptop. The spare tent’s repair was intact, just as he had reported.
Vera enlarged a frame showing ice around the guy line. “How old is this layer supposed to be?” “The preliminary profile puts it near twelve thousand years,” Catalina said. “We haven’t dated ice from this exact depth.” “Even if we had, that would date the ice, not the tent.” Vera moved her hands apart, leaving a gap between them. “An opening can admit younger material. First find out whether the ice surrounding it was disturbed.”
Nerea looked from the repair photograph to the video. “Or the camera image is corrupt. It repeats a pattern we’ve all seen because something upstream has mixed files.” “That wouldn’t explain the hand,” Andrés said. “It would if the whole image came from somewhere else,” she replied. Catalina appreciated the proposal because it could be tested. The raw recording included the cable marks and their voices. They could compare it with the independent depth log and Nicolás’s camera checks.
“And us?” Andrés asked. “We’ve spent a week working in cold and poor sleep. If we’re overlooking something simple, I’d rather find it now.” “That’s not an explanation for a recorded image,” Vera said, “but it could affect how we read one.” She took off her glasses and cleaned them with the corner of her shirt. “Let’s keep it on the list.”
Catalina drew columns on the back of an unused weather sheet: observation, possible explanation, test. She entered the patch and repair separately. The supplier might explain a patch; it did not explain access. A shaft might explain access; it did not explain why the spare tent remained in storage. A technical fault might explain an image; it required a fault that survived comparison with the recorder and depth log. None of the suggestions deserved to be discarded yet.
Nicolás tapped the printed site map. “Speaking of things we need to check, I re-imported the radar survey calibration file when we arrived. The project drive’s copy wouldn’t load cleanly the first time. These coordinates came from it.” “You compared the plotted features to the field readings,” Catalina said. “Of course. I’m saying the import is in the log if we want to retrace how we chose this borehole.” He drew a small circle around the drill site. The conversation moved on before anyone asked why the file had resisted loading.
“Who can see the footage?” Nerea asked. “Everyone here on the working drive?” Nicolás nodded. “The master stays disconnected. I’ll make a read-only copy for anyone who needs to measure frames.” “Good,” she said. “If we ask outside people for help, they’ll need to see what we see.”
Catalina folded the weather sheet along its blank margin. “I’ll send the program office a report when we’ve ruled out the obvious recording faults. We should know more tonight.” Vera looked at her. “What would we gain by waiting?” “A report that doesn’t announce a body on the basis of six pixels and a bracelet.” “Then don’t announce a body. Tell them what the camera recorded.”
Andrés set down his cup. “They may be able to tell us whether anyone worked this slope before our survey.” Catalina had meant to request those records herself, after she could frame the question. She heard the distinction and disliked it. If there had been an undocumented access route, someone outside the station might already know. “You’re right,” she told Vera. “A factual status message. Footage available on request. No identification.” Vera nodded once and returned to the screen.
Rodrigo checked the forecast on the wall display before leaving for the equipment room. A low-pressure system was expected to reach the coast in about three days; its track and strength were still uncertain. “I’ll start the rope inventory,” he said. “Inventory, not descent,” Catalina replied. “That’s why I said inventory.”
Catalina sent the message from the radio room. She described the camera depth, the cavity, the visible tent and hand, and the tests they intended to make. She attached still frames identified as processed for viewing and offered the complete raw file. She did not write that the bracelet belonged to Andrés. The difference between withholding an interpretation and withholding an observation troubled her enough that she added a sentence: a bracelet resembling one worn by a team member was visible on the wrist.
Late that night, under the long daylight, the main module grew quieter without growing dark. Nicolás was checking the camera housing for marks that could explain a composite image. Vera had taken a copy of the ice log. Catalina sat in the lab with Rodrigo’s proposed descent checklist and the laptop. A descent would need a load-rated anchor away from the borehole, a second line, continuous communication, an air check at the cavity entrance and enough battery reserve to get a person back out if the first lamp failed. She wrote the return conditions before she wrote the objectives.
Andrés came in carrying the flask. He looked at the checklist rather than the screen. “You’re not going down today?” “Not without Rodrigo’s rigging. Or an air reading.” “Good.” He poured the last of the tea into her cup. It had gone lukewarm, but she drank it. “Couldn’t sleep?” she asked. “It’s nearly midnight and the sun’s still on the window.” “That wasn’t an answer.” He sat beside her. “No.”
She opened the working copy and froze the image at the tent entrance. Andrés pulled off his right glove again and laid his wrist beside the laptop, carefully keeping it clear of the keyboard. His daughter’s bracelet had two round beads. Catalina had watched him worry the knot during long meetings, twisting the cord until it pressed a mark into his skin. The hand on the screen wore a darker cord. One of its beads presented a broad, flat face to the camera.
“Maybe it was made that way,” Catalina said. “Mine weren’t.” He turned his wrist. Both beads caught the light along their curved sides. “A copy, then. Someone could flatten one.” “Yes.” He leaned toward the screen. “Look at the edge. That isn’t cut. That’s wear. My grandfather’s rosary went like that against his belt buckle, and it took him most of his life.” She enlarged the working image without saving the change. The flat face met the curve in a soft, uneven line. It looked worn rather than cut. She could not prove that from a camera image through a frosted lens.
“It could be a lighting artefact,” she said. “Or a bead that started out defective.” Andrés waited while she compared the frames before and after the camera’s small rotation. The flat face stayed with the bead. “We can test the image,” she said. “And if we get down there, we can examine the bracelet. Until then, resemblance isn’t identification.” “I know.” He put his gloved hand over the bare wrist, warming it.
Catalina looked again at Rodrigo’s photograph of the spare tent. Its repair was four days old. The cord in the cavity appeared worn smooth. If the flat face on the bead was wear, it had come from years of rubbing against something harder than itself, not from four days. A hoax could put an old bracelet on a new tent. A shaft could put both beneath the ice. Each possibility left work to do. Andrés looked at the hand, then at his own covered wrist. “Whose hand is it?” Catalina closed neither the image nor the checklist. “We’ll find out,” she said.