Svo ég vitni beint í The Two Towers, bls.134: [Gandalf],,…till at last he [the Balrog] fled into dark tunnels. They were not made by Durin's folk, Gimli son of Glóin. Far, far below the deepest delvings of the Dwarves, the world is gnawed by nameless things. Even Sauron knows them not. They are older than he. Now I have walked there, but I will bring no report to darken the light of day."