She watched Sakura tie the knot and went over it a few times in her head while she finished with the rest of the rope. "What is it that you did in your home world?"

At the mention of being their light, Barbara held up her own torch. She'd had it turned off to conserve the batteries. They had no idea how long these tunnels went on for, and while she trusted Howard to be organised enough to have full energy put in them before leaving, it wouldn't do them any good to have both torches run out of power. But she turned it on now and lit the way up the slope, ignoring the gentle crunches from underfoot from the dried sludge.