Pale white lines ran along the darker stone. There were four of them, running parallel along the passage for at least ten feet. As though someone had scraped enormous nails across the rock wall. Abby lifted her own hand and held it just an inch above the scrapes. Even when she spread her fingers as wide as possible, she still couldn’t cover the same surface area as the marks. Her fingers shook as she drew them back into a fist at her side.
