Probably thirty seconds had passed since she'd turned it off.

The light pushed the cave back to its former size, and she breathed deeply, embarrassed that her sigh of relief was so audible.

"Lookie," Holden said, politely ignoring her personal crisis. "Cave pearls."

To the left of the trail, in a shallow basin on the lip of Boulder Falls, was a formation cavers called pearls. They formed much the same way pearls formed in oysters. As water dripped from above, rolling around grains of sand, the limestone in the liquid began to coat them. Because of the movement the pearls stayed free rather than being captured in a static formation.

"There used to be one in Liberty Bell. A big one we called the Jupiter Pearl," Holden said. "It had a red dot on it. Every time you came through, the dot was in a different place, orbiting around its tiny solar system."

"What happened to it?" Anna asked just to keep the conversation going. She didn't care, and that shamed her. People caught up in themselves, trapped in their own web of fear and greed, were the worst possible custodians of the wilderness.

"Some SOB stole it."

Anna nodded, trying to communicate a concern she knew she should feel. To her the pearls lacked beauty. They were misshapen and dirt-colored; their wet convex surfaces looked like things not quite alive: stumps oozing, eyeballs set aside for unimaginable Frankensteinian monsters.

"Want a piece of candy?" Holden held out a red Jolly Rancher, and Anna accepted it gratefully.

"I'm sorry about the Jupiter Pearl," she said to pay for the treat.

"So it goes," Holden said. "And then it's gone."

The sadness in his voice cut through her cloak of self-pity. In more ways than one, the underground was the only true wilderness remaining.