Chapter 396: The Uneven Shift

The Carrow brief arrived on Ren’s slate.

Eastbound follow-up at the Offset Stretch.

Closer measurement across a sampled strip under Surveyor Lisk.

Report to the Carrow post within the window below.

He checked the reporting time against the transport connections, booked both journeys and sent the post his expected arrival. Lyra was on the Terrace when he went to tell her. Her shoreline notes had been handed in, and she was working on another sheet.

"What are they checking this time?"

"How much the result changes between the lines they’ve already walked."

"So, not the one they opened?"

"The westbound lane’s still open under the same limits. This is another approach."

She nodded and returned to her page while he went to pack his notebook.

At Carrow, Enna turned the completed eastbound pages toward him before bringing out the new plan.

Two of her crew had signed the entries. Several lines on the western side had been walked repeatedly, with their starting positions measured from the reference stones Ren had set. Those stones had served the receiving side during his westbound work. For an eastbound crossing, they stood beside the approach.

The emergence readings came from the checked posts on the eastern side. Each entry line gave a repeatable result, but the lateral offsets differed between lines.

"That’s what the survey established," Enna said. "We need closer readings between them."

She laid the plan beside the book and pointed out the approved westbound tracks and their receiving corridor.

"Today’s strip lies beside that corridor and extends south. These are separate entries."

"Eastbound carts still take the detour?"

"Yes. This approach isn’t cleared. That doesn’t tell us every possible route east is unusable."

She traced the sampled strip.

"You’ve walked the section, your readings held, and you tested a prediction here. I want you on these crossings."

Ren set his notebook beside the plan.

— • —

They began with the two known lines, one a few strides south of the other.

While the receiving crew checked the eastern posts and footing, Ren helped measure the entry stakes from the western stones. He read the distances and side of the baseline while another crew member held the rod. Enna checked his sheet against the established positions and confirmed the headings.

Ren walked the northern line, right foot first, at an ordinary pace. He stopped on his first full step clear of the eastern boundary. The crew marked that foot placement and measured it from both posts, recording the side of their baseline and the height. Their cords stayed on ordinary ground.

He returned by the footpath, crossed from the southern entry, then went around again. They repeated both lines with the same starting foot and pace.

The new readings agreed with the field book within tolerance.

Enna placed the two confirmed pairs on his plan.

"Now yours."

Ren compared the spacing. The southern entry had brought him farther south than an equal shift of the northern crossing would have done. The emergence points stood farther apart than the starting lines.

He marked an entry halfway between them and predicted an emergence halfway between their measured exits. Beside it he wrote:

Change between the lines treated as even.

Then he chose an outer entry south of the pair, on ground Enna had approved. He measured its additional distance on the plan and extended the same relationship to predict its emergence. Both predictions were marked before anyone walked either line.

"Why halfway first?" Enna asked.

"It checks the change between the readings we already trust." He glanced at the older pages in his notebook. "I’ve seen routes through worked stone give different measurements. I don’t want to treat this whole strip as one crossing."

"Leave the assumption beside both."

Ren helped set out and measure the new entry positions. On the eastern side, the crew inspected the ground around the halfway prediction, including room beyond its measuring band. Enna went around to look at it herself before sending him across.

He stood behind the new entry stake. From there, the nearer sighting pole hid the farther one.

His boots scraped on firm dirt as he walked east. At the boundary he stopped, brought his other foot beside the first and looked up. The poles stood apart. He felt no turn in his legs or pull through his shoulders.

The recorder marked his foot placement. Ren waited while the crew took the measurements, then returned by the path and walked the same line again.

Enna compared both results with the plan.

"Within tolerance. Both."

The measured marks lay inside the band he had drawn around his prediction. He copied the readings beneath it, then checked the spacing against the two known exits. The intermediate crossing had followed the change he’d proposed.

A crew member called a hold. A westbound load was waiting at the closure sign.

Ren stepped onto the checked path with the others. He recognized the carter who had been unloading onto a smaller cart on his first visit. The detour had been too steep for the full load.

The bundles were all aboard now, lashed along the bed. The post had checked the cart and load against the lane’s limits. A crew member guided its wheels onto the entry marks, stepped clear and gave the signal.

The horse walked through. The cart followed, emerging on packed road within the approved receiving corridor. The driver kept heading west.

Ren watched until the rear wheels were clear. Then the crew released the hold and returned to the survey.

The outer entry was next. Its receiving area had been inspected around and beyond the predicted band. Enna checked the crew’s findings before giving Ren the crossing.

He walked from the marked start and stopped on his first clear step. His boots were on sound ground within the inspected area. The crew took their readings.

On the plan, his emergence lay south of the predicted band.

Enna had the entry stake checked against the western stones. The receiving crew repeated their reference checks, and she verified the heading before sending him through again.

Nothing in those checks accounted for the difference.

Ren repeated the crossing. The second foot placement lay within a hand’s width of the first. Both were south of his band, beyond the recorded tolerance.

’I’d drawn that line a bit too far.’

He put the measured positions beside the prediction. Between the first two entries, a given move south had corresponded to a larger move at the exit. Across this outer interval, the increase was larger again.

"The change is steeper here," Enna said. "We need closer readings between these two."

She bracketed the southern known entry and the new outer one.

"So that rule stops somewhere in there."

"It doesn’t fit across the whole interval. We haven’t measured the entries between them."

Ren left his prediction legible beneath the results.

— • —

The finished map showed four eastbound lines, each walked twice. Enna kept the predicted positions distinct from the measured ones and marked the interval requiring further survey. The westbound lane remained on the plan with its existing limits.

"These positions don’t preserve the separation," she said. "I’m not clearing an axle from them."

"And walkers?"

"Four lines don’t give us a walking corridor. The crew can keep crossing under survey conditions. Public eastbound traffic stays on the detour."

She signed the results and the traffic entry, then gave Ren his measurement sheet.

"Initial yours."

He checked and initialed the entry positions and spacing he had measured on the western side. The emergence readings carried the receiving crew’s initials. Enna attached both sheets to the map.

"The office will handle your fee."

Ren copied the confirmed positions and the bracket into his notebook. He retained the assumption beside each prediction, including the one that had failed, then packed the pages for the journey home.

On the transport, he opened the plan once more. His first Carrow work had shown the same offset holding across the tested westbound tracks: moving the entry south moved the emergence south by the same amount. Today, the emergence changed by more than the entry. He had used that relationship to place the halfway crossing, then found that it failed at the outer entry.

Each line had repeated. The difference belonged to the entries they had chosen, rather than a crossing that changed each time he walked it.

Ren asked the System privately for the result.

[SPACE: 2.25% → 2.50%.]

He dismissed the line and turned to his Time notes.

The notch at the keeper’s pool was sketched beside the falling water. His early notes separated the two forms: slowing held to a place, and slowing carried by one chosen drop. The later attempts followed the same working as he changed its attachment from the fixed region to water already inside it.

He had kept that slowing through the transfer. Below the former region, the chosen drop continued slowly while the next passed through the old place normally. At the household spout, he had used the handoff while the resident exchanged its jar for a cup.

The reverse was still a question. If he started with slowing carried by a drop, could he attach the continuing working to a fixed place as the water passed through it?

The keeper had told him to come back when he wanted the next thing. Once he was home, he would go to the northern shore and ask.

He wrote beneath the last attempt:

Water back to place?