<P> The Chamber of Mazarbul, the chamber of records, was a room in Moria containing the Tomb of Balin . It was located to the right of a pathway that branched off the north end of the Twenty - first Hall . When the Fellowship found the chamber as they passed through Moria, Balin's tomb was located inside it, and a bright shaft of sunlight streamed in from outside the mountain to land directly on the tomb . There were two stone doors leading into the chamber . Many deep recesses were cut into the chamber rock containing chests that had been recently looted by the orcs inhabiting Moria . In one of these was found the Book of Mazarbul . The book told of Balin's expedition to Moria . The last words in the book were written by Ori and he wrote: "We have barred the gates, but cannot hold them for long . We cannot get out . They have taken the Bridge and the Second Hall . Frár and Lóni and Náli fell there . The pool is up to the wall at the Westgate . The Watcher in the Water took Óin . We cannot get out . The end comes . Drums, drums in the deep . They are coming ." It was in the Chamber of Mazarbul that the Fellowship engaged in a brief fight with a band of Moria orcs and where Gandalf made his first stand against the Balrog . </P> <P> The Chamber's depiction in Peter Jackson's The Lord of the Rings: The Fellowship of the Ring film is loosely based on the description in the books; however the walls are covered with inscriptions in Khuzdul and the Common Speech not found in Tolkien's work, and the doors to the chamber are made of wood rather than stone . </P> <P> The Bridge of Khazad - dûm is a narrow stone bridge crossing a chasm within the eastern gates of Moria . It lends its name to Chapter 5 in Book II of The Lord of the Rings, in which Gandalf referred to it as Durin's Bridge . </P> <P> The bridge was built to guard the East Gate of Khazad - dûm . It narrowly spanned a deep chasm built under the high arches common in Khazad - dûm . This gave the bridge powerful defensive value, for if an enemy were to breach the East Gate of Khazad - dûm, he would be forced to cross the span of the Bridge (some fifty feet) in single file line, exposing the crossing enemy to the arrows of the Dwarven defenders . </P>

How did moria fall in lord of the rings