From Ch.8 of THE LIMINAL MAN:
“Do you really think killing Sparrow will reverse everything?”
“Best I can figure,” she sighed, “both sides of this place move like a watch so long as there’s someone winding it. Everything goes together, all tick-tock like, and when one moves, the other does too. When Dullington left, that watch started to slow down. Sparrow’s not where Dullington used to be in terms of power, but he will be, and when that happens I think the watch will start moving back at its normal speed. Killing him might stop the watch altogether and weaken whatever’s keeping us here. We need to move on it before he’s back where Dullington used to be.”
He nodded, then let out a large yawn. Evelyn smiled and patted his hand.
“I done talked your ear off,” she whispered. “Go get some rest, Q-ball. It’s going to be a long day tomorrow.”
Quinn did as she suggested, failing to hold back another yawn as he rose from his seat. Something occurred to him, though, as he took the first few steps away from the burning barrel.
“Evelyn?” he called out. The old woman turned from the flames and looked up at him. “What happens when no one’s there to wind the watch?”
She stared at him for a moment, her lips pursed into a kind of frown that shifted in the dancing firelight, and when she turned back around to face the flames, Quinn had a frightening epiphany: She has no idea.