Nathaniel has turned and allowed Lady, his miniature mabari, to jump into his arms to be carried. He tucks her in his pack and adjusts.

"For a time, this prison was one of our darkest secrets," he answers, eyes on the path as he takes up the rear guard. "Warden Sashamiri was the one who captured Corypheus. She wanted to study him. See if we could use his power of controlling the darkspawn. It was discovered he had just as much control over us as he had over them, and so we imprisoned him here. Locks within locks, traps within traps."