The meal trolley struck the dining-room threshold.
CLATTER!
Three covered bowls slid across its top, and Sera caught the nearest before it reached the edge. "If breakfast escapes after everything we did to come back, I may take it personally."
The kitchen worker steadied the trolley and inspected the warped front wheel. "The wheel caught again, so give me a hand with this side."
Sera set the bowl down, rose with her bandaged forearm held clear, and took one side of the trolley. Reth caught the other.
Reth braced the wheel against the stone lip. "It is already set, so lift on two."
Sera adjusted her grip, and they lifted together. The trolley came over the worn stone ridge and rolled into the recovery dining room, where Vhar, Nyra, and Kavos had taken the end of a long table near the windows.
A braced-yard safety notice lay beside Vhar's breakfast.
Sera read it while lowering herself onto the bench. "No live frames or active cables until the evidence room finishes with us, and no occupied practice lane without a safety officer."
Vhar tore a piece of bread. "They have removed almost everything likely to interrupt breakfast."
Sera pushed the porridge toward him. "She left breakfast on the list."
"That gives me one subject I can pass without further injury."
Kavos poured tea into five cups. His ankle had been wrapped, though he could put weight on it again. "The evidence clerk sent word before first bell. He wants our separate accounts by midday, and he wants us to compare them before we sign anything."
Nyra accepted a cup. "That is sensible because five matching accounts would look rehearsed, especially when none of us occupied the same position."
Reth unfolded the quarry sketch he had carried from the field. "Mine will not match yours because I spent most of the lower shelf looking at stone."
Sera reached for an egg. "I spent most of it looking at people who were about to be crushed by stone."
Reth flattened the sketch between them. "Put both accounts down because they cover different parts of the shelf."
Vhar moved the porridge bowl away from the map before Reth could spread it across the table. "Start with the Wildblood boundary because that changed before the predator or the cables reached us."
Reth placed one finger on the upper rim. "The expected path descended here, and although the first altered stake pushed us west, its footing was the important part because the stone around it had been packed recently, while the other markers had years of grit under their collars."
"Could the trial staff have reset it?"
"They could have, though they would have needed the assignment map and enough time to cut a new socket. The replacement angle also pointed toward the collector shelf rather than a safe descent."
Kavos leaned over the sketch but kept his hand off it. "From the convoy road, I saw no crew on the western shelf, although that covers only the period after we passed the north watch post."
Sera peeled the egg against the table. "I can give you the body timing: the false cadence reached the Quarrymaw before we crossed the sample shelf, and the later cable snare did not pull until Kavos reached the opposite ledge, so whoever set the field used the beast first and still expected bodies in both machine lanes afterward."
Nyra looked up from her tea. "The old-metal cadence began before the Quarrymaw entered the shelf, and I felt the same pattern through the spear shaft when the later collector drum woke; the machine and the beast's filaments were connected through the stone, but they were not one body."
"Was the fresh hardware carrying the same cadence?" Kavos asked.
"No. The older iron held the pattern, while the replaced collar and cable fittings carried ordinary Uvar from recent handling."
Reth turned the map and drew a short line beside the collector shelf. "That agrees with the oil."
Vhar glanced at him. "Explain."
"The old assembly used a mineral grease that hardens near quarry dust, but the bolts we recovered had thin machine oil under their heads, and it was still wet when the housing opened."
Sera paused with half the egg gone. "How long does that stay wet?"
"In a sealed store, weeks. Inside that quarry, with dust and heat coming through the collector shaft, perhaps two days unless someone kept adding more."
"The team assignment was posted two days before departure," Nyra said.
Sera set the peeled shell fragments into a neat pile. "That leaves somebody a very small window. The supply hall closes after evening bell unless a repair task carries an emergency seal."
Nyra looked at her. "How do you know that?"
"I worked two weeks unloading practice frames after my first evaluation. If a cart arrived late, we slept beside it until the morning clerk opened the doors."
Reth glanced at her wrapped arm. "You never mentioned that."
"It was not useful until now." Sera brushed the shell fragments into an empty cup. "The carts are heavier than they look, and the night clerk never opens early."
Nobody answered immediately.
Around them, the dining room continued with ordinary morning noise. Students argued over training-yard time. A kitchen assistant carried empty cups toward the wash station. Somebody near the far wall laughed hard enough to choke on tea, and two friends struck his back while offering completely unhelpful advice.
The First Measure Academy had not stopped being a school because one field trial went wrong. That made the quiet around their table feel more precise.
Vhar crossed out `our names` on his sheet and replaced it with `the assignment`.
Reth considered it. "The store carries cable, hooks, wedges, and ordinary grease, but it does not issue Academy collector collars."
Nyra set her cup down. "Those collars are numbered in the Academy supply hall because they can alter a field meter. A quarry worker could install one, but someone had to remove it from the supply ledger first."
The kitchen worker returned with a replacement pin for the trolley wheel. He crouched beside the warped axle, muttered at it, and knocked the pin through with the handle of a spoon.
Vhar watched the wheel settle. "Yesterday's trolley had a red wax square on the axle."
The worker glanced up. "Supply-hall repair mark."
"Does every item leaving that hall carry one?"
Reth reached into the evidence pouch hanging from his belt. He did not open the sealed inner wrap, but he turned the clear outer face toward the table.
A smear of blue wax clung beneath the recovered bolt washer.
Sera stared at it. "You saw that last night?"
"I saw wax, but the evidence room was too dark under the screen for the color to matter."
Kavos leaned sideways until the window light crossed the pouch. "Blue, though there is no number left."
Nyra's expression tightened. "The supply hall scrapes temporary marks when material returns, so that washer did not return through the hall."
The kitchen worker stood with his repaired trolley. "If you are asking who can enter field supply, the answer is instructors, stores staff, sponsored trial associations, repair crews with a signed task, and candidates carrying an issue sheet, all recorded in the door ledger."
He pushed the trolley once, found the wheel straight, and continued toward the next table.
Vhar looked after him. "Breakfast has produced more evidence than the quarry."
Sera took another egg. "Breakfast has better working conditions."
Nyra pulled a clean testimony sheet toward her and passed another to Sera. "Write the time you saw the first cable move. I will attach the cadence separately because I felt it before any of you heard the drum."
Sera bent over the page, frowned, and pushed it toward Kavos. "Mark where you were when the second cable tightened, because I remember your ledge, though you will remember the angle better."
Kavos drew the sightline and stopped it at the north watch post. "Past here, I cannot tell them who entered from another side."
Reth placed the altered footing beside that line and turned the evidence pouch so the blue wax caught the window. The wet oil fixed the work near their assignment, while the wax carried one replaced part back to Academy supply access.
Vhar added what none of their separate positions had shown alone: the old spindle had driven force through the connected cables, but the fresh collar and fittings had selected which occupied cable tightened.
Nyra read all five pages without smoothing their different language into one voice. "The reconstruction only needs to answer whether that selection could happen after someone turned the spindle, while the rest stays exactly as each of us saw it."
Five accounts reached the same danger from different places: somebody had altered a Wildblood boundary, used the old collector cadence to draw a Tier III predator, prepared two occupied cable lanes after it, and arranged to receive the spindle before the team came home.
The evidence clerk arrived just before midday. He read the blue-wax entry twice, then collected the five accounts without asking them to rewrite a single line.
"The supply-hall ledger opens this afternoon," he said. "Before that happens, the Academy reader wants a controlled reconstruction of the base."
Sera glanced at the safety notice and Kavos's wrapped ankle. "You want all five of us safely inside the reconstruction room?"
The clerk looked over the bandages before answering.
"You are the only five people who saw it active, so yes, though the safety officer decides where each of you stands."
Vhar finished the last of his tea. "Please tell me the evidence room keeps a second breakfast."
The clerk glanced at the emptied table. "It does not."
Vhar gathered his testimony sheet and looked at the empty serving bowls. "I should have taken another egg."
Kavos laughed into his cup. Even Nyra's mouth shifted before she gathered her testimony copy.
The clerk did not smile, but he waited for Vhar to stand before leading them toward the evidence wing.