It seemed that she was waking up every five minutes, which gave Saskia the idea that very little time was passing. But when she came awake for good, and threw off the emergency blanket she’d been using to keep the light from her eyes, and gazed up through the multiple layers of gridded catwalks above her, she saw more light—a lot more—filtering down the mine shaft. So convinced was she that it was still the middle of the night that she imagined, at first, that they were being attacked or rescued. But when she ascended the ladder to Level Zero and looked at the wall clock, she saw that it was morning. The light coming down the shaft was that of the sun.