The lantern wasn’t strong enough to tell him how far back the tracks might go; its beams surrendered to the unnatural walls and other lines, showing nothing but a large, cleared space that could’ve been the bottom of any silver mine or saltworks. There, three different sets of tracks stretched out in three different directions, all disappearing within ten yards. Rector didn’t hear any rolling wheels, creaking carts, or squealing brakes. If these tunnels were ever used, nobody was down there now.

He closed his eyes again and backed up to the stairwell, struggling to determine which of the tracks might head off in the general direction of north. Instinct told him it was the middle set, which curved off to the left. He let his instinct win, swung his shoulders to adjust his pack, and set off.

So this was the underground.

Dark, close, and eerily quiet. After twenty minutes of exploring, seeking some exit other than the way he’d come in, Rector spotted a byway tunnel. The edge of his lantern’s light brushed up against something that looked promisingly like a staircase.

He adjusted his mask. If he was going to hit the great outdoors again, the seal needed to be snug. He hated the seal, he hated the snugness, and he hated the way the rubber line against his face was itching something awful—a combination of ordinary friction and the Blight’s irritation. Sometimes he forgot that he shouldn’t scratch the seam, and one hand would reach up mindlessly to give it a vigorous scrubbing with his fingernails. But then he’d remember that it would only make the itch worse, and he’d stop himself, and swear about it.

Resisting the urge to take the steps two at a time, he let his lantern lead the way. Up he climbed, slowly enough that his chest didn’t hurt and his breath didn’t fog up the mask’s interior.

At the top he found a trapdoor of sorts, the kind used to cover up root cellars and basements when they need an outside entrance. These doors were doubled, and they were latched from within—just like the windows in the other building.

“They probably want to keep people out, too. Not just rotters.” But he suspected the security system wasn’t so great, if any dumb kid from the Outskirts could let himself inside. “Or maybe I’m just lucky.”

He laughed out loud at that, and tried to rub at an itchy place on his nose, only to be reminded that the gas mask blocked any serious relief.

The door’s fastener wasn’t too complicated. It was just a system of levers on a crank, so when he turned a wheel, the lock slid aside and the doors would swing … in? No. They swung out. He lifted the right-side door and raised his head a few inches to look around.