It was metal, in the shape of an arrow, lying rusted on the ground beneath a cracked wood beam. Big Country Secret Cavern, it read, in Jet Age 1950s script. It was Joe Walke’s idea. If he wasn’t convinced by my story, he knew we were in danger when he spotted the man with the gun riding on the outside of the helicopter. There was no way to drive out of the area without being spotted from the air, so Joe insisted we bail while he drew Haber and his men off in another direction. A former coal miner and also the son of a coal miner, he’d spent his whole life in the area and could navigate the woods blindfolded. Rosalind, too, knew a special way out on foot. “This place was big a long time ago, but it’s been closed for years. Even the road is gone,” Rosalind said as we stepped past the sign, Roxie at our heels. In the low moonlight, I saw that there was an indentation in the hill we’d been skirting.