Pella didn’t right away seize the copper wire. In accordance with the foundational training Hal Rook had drilled into her as an apprentice, she stood before the slate board, held Jo’s paper in her hand, and read the numbers aloud to the room three times, ensuring that every mind was anchored to the same physical reality.
“Current load: sixty-eight pounds of pressure,” Pella recited, her voice loud, clear, and unrushed. “Available water chute margin: twelve thousand gallons a minute. Maximum allowable surge ceiling: seventy-five pounds. Time leftover on Ada’s clock: thirty-one minutes.”
“Sixty-eight... Twelve thousand... Seventy-five,” Eren Tal repeated back from the stop bell, his mallet poised. “The numbers are heard and understood.”
“Sixty-eight... Twelve thousand... Seventy-five,” Kel Dorr repeated from the water clock, his quill pen recording the values in the town register. “The numbers are entered on the docket.” Pella set the paper down, took her seat on the wooden bench, and picked up the copper wire. The delay had cost them eleven minutes, but it had bought them total certainty. They weren’t guessing in the dark. They were running inside a checked envelope.
The clock on the work-order slate stood at minute 51 and 42 seconds on the Courtesy Arch clockwork dial, with 39 minutes left before forced recall as cold mountain runoff carrying stale sump scale swirled against the leaded top stone ledge. It sent a low, rushing rhythm across the snapped limestone bedding. Ada Morland, working as the Yorkshire commercial plumber, checked the four-eye repeat-back…
