Chương 64: CHAPTER SIXTY-FOUR: THE NORTHERN STATION

Jin built the northern heliograph station in July, on the high ground above Coppermill that Hollis had identified during the winter's patrol circuit as the best positioned site in the march for northern coverage. He built it himself — not because the construction required his specific skills, but because he wanted to understand the sightlines and the relay geometry from physical experience rather than from the map.

Jin had learned, in two years of building the network, that the map told you where the stations should be and the ground told you where they actually worked, and the gap between those two things was always worth knowing before you committed to a location. The station was operational on a Thursday afternoon in mid-July.

The test transmission — the initial calibration sequence that each new station required — was sent south to the Greyhold station, relayed to the east axis confirmation point, and returned as a clean signal. Then Jin went north to the boundary relay point and sent the specific sequence that Confluix had been briefed to watch for. He waited thirty minutes.

The return signal came from a position that was not the boundary relay point but was consistent with the location that Confluix had indicated it would use — a high ridge north of the boundary that provided the necessary sightlines. The signal was clean. The sequence was correct. Jin sent back the acknowledgment and broke down his equipment and rode south. His report to the council the following week was characteristically economical: "Northern station operational. Confluix confirmed receipt and responded.

Round-trip signal time: thirty-three minutes including relay. Weather permitting, the northern reporting cycle is no longer dependent on the monthly meeting at the boundary." Unauthorized use: this story is on Amazon without permission from the author. Report any sightings.

"What's the contingency for adverse weather?" Marcus said.

"Riders to Corvan," Jin said.

"He maintains the boundary relay point as a message drop regardless of weather. Confluix has been using it since the alliance was established." He paused.

"The heliograph is the primary. The message drop is the backup. The monthly boundary meeting is the contingency for extended periods where neither primary nor backup is functional."

"Three layers," Hollis said, with the approval of a professional assessing a contingency structure.

"Standard," Jin said.

"You build to three layers or you build to fail." Marcus looked at the coverage map and thought about the network that had been two people with a textile signal a year ago and was now forty-three contacts across a hundred and thirty miles of coverage with a heliograph system that could carry a message faster than any horse. He thought about what Jin had built alone, on the road, with the specific skill of a signals specialist who had found the right problem for his training.

"The second generation of the mirror design," he said.

"Briggs said spring."

"Summer, actually," Briggs said, from his position.

"I got delayed by the blast furnace modifications. But the prototype is ready and I'm happy with it. The surface quality is better — it should extend the effective range by twenty to twenty-five percent."

"When do you want to upgrade the existing stations?" Jin said.

"Roll it through the southern axis first," Briggs said.

"Test the extended range against known distances before we rely on it for the northern coverage." He paused.

"Four weeks to upgrade the southern axis. Another two to verify the range extension. Then northern."

"Done," Marcus said. He looked at the map again. A hundred and thirty miles of coverage, soon to be a hundred and sixty. Messages in under two hours in clear weather. The network that connected the organization's distributed nodes — Greyhold, Hargrove's territory, Fenwick's boundary, Chung's capital contacts, Confluix in the north — into something that functioned like a unified information system rather than a collection of separate operations.

He had been thinking for two years about the gap between what they had and what they needed. The gap was narrowing. Not closed — it would not close, the nature of a dynamic situation was that the requirements grew with the capability — but narrowing.