Samuel Whitaker did not look at Dana when he opened the mapping application on his tablet. He looked at the ground, as if the map were only a reminder of something he already knew by heart. The screen showed Alder Ridge in thin gray streets and paler blocks, and over it a blue line ran steadily. The line passed beneath Dana's property, then curved along Colin's side yard, the same side yard where the sprinkler lay broken and the soil had turned to mud. Colin stepped closer, mud still clinging to his shoes, and watched the blue line bend.
A small square sat on the line beneath Dana's driveway. Samuel tapped it with one fingertip, and the label appeared in plain letters: Valve Station 3B.
"That square," Samuel said, "is where the chamber belongs."
Miriam held the evidence bag up beside the tablet so the numbers could be compared in the daylight. The brass plate inside the bag carried the same number, stamped deep enough that mud had settled into the grooves and made the figures stand out dark against the metal. Colin read it twice, although he had already read it once when Miriam cleaned it with bottled water. The match was not subtle. It left no room for a second explanation, and for a moment nobody spoke.
"Someone removed the identification plate from the valve chamber," Samuel said, his voice flat in the way of a man stating a measurement rather than making a charge. "Then they buried it on Mr. Reeves's property."
Cheryl Boone drew in a breath. Martin stood beside her with his arms crossed, his face reddening. Leonard Shaw, still holding his camera, lowered it slowly.
"Why would anyone do that?" Cheryl asked.
Samuel answered without looking up from the tablet. "To make the city believe any future discovery here belonged to his irrigation system."
Dana, who had been standing near the edge of her driveway with her arms folded, gave a short laugh that sounded rehearsed. "That is speculation," she said.
Samuel did not argue with her. He turned to the utility crew instead, two workers in hard hats and reflective vests who had been waiting beside the yellow municipal vehicle. "Scan the driveway," Samuel said.
The crew rolled a ground-penetrating radar unit out onto the dark stamped concrete. It was a low, wheeled machine with a handle and a screen, and it moved in straight lines, back and forth, each pass overlapping the last by a careful margin. Colin watched the screen over one worker's shoulder, although the image meant little to him at first: bands of gray and black, bright arcs where something solid interrupted the signal, a slow scroll of underground shapes that looked like weather on a radar map.
The first pass revealed the old fire main. Samuel pointed at the thick, steady line on the screen and named it without hesitation. It ran deep and straight, unbothered by the houses above it, a piece of the city that did its work in silence.
The second pass showed the valve chamber. It appeared as a hollow rectangle beneath the driveway, twelve feet from the garage foundation, exactly where Samuel had said the original access hatch had sat before the concrete was poured. Colin thought of the driveway as he had seen it for the past six months: the dark stamped concrete, the new stone border along one side, the neatness of it, the way Dana had pointed it out once as if a driveway were an achievement. Beneath that neatness, the chamber sat like a room with its door removed.
The third pass revealed something on no city map.
A new line branched from the chamber and ran beneath Dana's garage toward the rear fence. It was nearly six inches wide, and on the screen it stood out against the older pipework the way a fresh scar stands out against old skin. Samuel stared at the screen, his hand resting on the edge of the machine, and when he spoke his voice had lost the flatness of measurement and gained something harder.
"No permit covers that connection," he said.
Dana stepped backward. It was a small movement, one step, her rubber boots scraping faintly on the concrete, but Colin noticed it because everything about Dana that morning had been forward: forward into his yard, forward with the red folder, forward with her demands. Now she moved back, as if the ground itself had shifted under her feet.