The drop in temperature that followed the midnight watch turned the moisture inside the stone conduits into a web of white needle-ice, testing the absolute limits of the linen- wrapped trunk lines where they crossed beneath the mill-race. Inside the undercroft, the walnut rotor maintained its unyielding ninety-two revolutions per minute, but the secondary terminal frame emitted a faint, dry crackle—a high-frequency leakage signal that caused the small iron indicator pins on Thomas's testing slate to vibrate against their lead backings.
Thomas stood by the primary commutator stack, his face lit by the pale, intermittent sparking of the spring-steel brushes as they cleared the worn copper segments. The air in the engine room was dense and hot, smelling strongly of parched tallow, boiled resin, and the sharp, clean bite of localized ozone that always accompanied a prolonged surge in the regional load.
He drew the glass phone from his linen tunic, his thumb clearing a dark smudge of lard- grease from the bottom margin of the screen before the text could render. The internal battery indication registered a perfect one hundred percent, sustained by the closed induction loop Wat had anchored beneath the main water-wheel race. He accessed his engineering directory, his eyes scanning a series of cached text files that detailed the dielectric breakdown values for natural vegetable resins under extreme sub-zero conditions. The formulas were stark, indicating that a triple-wrapped linen shield saturated in pure pine-sap and linseed oil would retain its insulation boundaries even if the surrounding soil froze to a depth of three feet, provided the terminal junction blocks remained entirely free of mineral-heavy silt. The system was maintaining that margin by the thinnest of tolerances, the current traveling down the ridge trench with a uniform velocity that left the system completely clear of major ground-fault indicators.
He swiped his thumb across the polished surface to clear the matrices, the green characters of his mother's daily letter appearing line by line through that regular twenty- four-hour delay that marked his separation from the future.
His mother wrote that she had spent her Friday morning sitting in her sewing room, watching the municipal electric crew use an automated diagnostic truck to locate a buried short-circuit in the primary power lines beneath the library parking lot. She described how the technicians had connected a portable high-frequency pulse generator to the transformer box, using a handheld digital receiver to trace the sound-waves of the electrical arc through three feet of solid asphalt without ever striking a single shovel into the frozen earth. She mentioned finding his grandfathers old brass wire-crimper in the bottom drawer of the tool chest—the heavy one with the hand-filed notch along the jaws that the old man had used to fasten the copper connectors for the water-treatment pumps during the winter of nineteen-sixty-six. She said she had rubbed the dark tarnish off the metal with a piece of steel wool, noting that the small stamped numbers along the rim were still as sharp and distinct as they were sixty years ago, and she hoped his own joints were holding their alignment against the winter gales. Thomas locked the display, the green light dying against his leather smock as he slid the phone back into his secure internal pocket. He stood in the warm draft of the commutator for a moment, his ears tracking the deep, subterranean thud-clack of the main keep pump through the floorboards. In Denver, his mother was looking at an urban infrastructure grid where a two-man utility crew could deploy an electromagnetic pulse locator to pinpoint a structural insulation failure through three feet of solid pavement using a digitized dashboard that measured the wave-reflections to within a fraction of an inch. Here, his insulation tester was a one-eyed blacksmith using a dry hazel rod to check for smoke along the sand-trench caps, and his automated protection was a three-ton block of hand-hewn white limestone dropped into the mud by five men who still measured their days by the ringing of the priory bell.
He left the undercroft and walked down the long, covered gallery to the lower common pasture, his heavy boots making a sharp, metallic ringing sound on the frozen flints where the wains had compressed the ruts.
Victoria had not moved from her low packing crate beneath the gatehouse archway, though the north wind was now carrying fine, hard grains of mountain snow that rattled against her master folios like handfuls of sand. She sat with her charcoal cloak pulled tight around her throat, her bare fingers moving with a swift, mechanical rhythm across the vellum page as she recorded the late-night tallies for the western drapers.
"
Old Joan was the one who found him this time, climbing down into the undercroft with a covered basket balanced on her hip, unbothered by the ozone smell or the freezing wet underfoot. She'd taken to bringing food down to whoever was on the late watch without being asked, and nobody had ever quite worked out how to tell her to stop, or wanted to.
"You'll eat this before it goes cold, or you won't eat it at all," she said, setting the basket on the dry end of the bench. "There's a broth in there and half a loaf, and I'll not have you telling me you were too busy with your wires to sit still for ten minutes."
"I appreciate it, Joan."
"You'll appreciate it more once it's in your stomach." She settled herself on an upturned crate with the ease of a woman who'd raised four children and buried a husband and found very little in the world left to be impressed by. "My granddaughter asked me yesterday why the water runs warm out of the trough by the wash-house even when the sky's fit to freeze the birds out of the air. I told her it was the Lord's mercy on account of my good behavior. She's eight. She didn't believe a word of it, which tells you she'll do better in this world than I did."
Thomas laughed despite the cold in his hands, and took the bowl she handed him. "What did you actually tell her?"
"I told her you'd explain it to her yourself, next time you had an hour to spare, because it's your doing and not mine, and a person ought to hear the truth from whoever's responsible for it." Joan fixed him with a look that had probably quelled entire kitchens in its time. "You spend so much of your day talking to that glass of yours and to the Baron's men and to my lady with her ledgers. You might spend one afternoon talking to a child about why the water's warm. She'll remember it longer than any of us will."
He didn't have an answer for that beyond agreeing, which he did, and meant.
"Good," Joan said, already rising, already moving toward the stairs. "See that you do. Now eat your broth before it skins over. I didn't carry it down here to watch you let it go cold while you stare at that stone in your hand."