Later, the Fellowship find the Book of Mazarbul, a record of Balin's failed expedition of Dwarves to reclaim Moria. In the last pages of the book, the scribe, revealed to be Ori, relates: "We cannot get out. We cannot get out. They Orcs have taken the Bridge and second hall. ... the pool is up to the wall at Westgate. The Watcher in the Water took Óin. We cannot get out. The end comes ... drums, drums in the deep ... they are coming."