Ree left the tracks and crossed a level field to reach the slope of caves. Weeds and grasses were made stiff by a bark of ice, shimmering and fragile, and shattered underfoot. The shimmering grasses tinkled to nothing as she kicked her feet. The caves were easy to see from below but difficult to reach. Ree snatched onto saplings to pull herself through the beating weather and up the steepness toward the slant gaping cave she knew best, the cave with a wall of stones standing in the mouth.