Gollum has picked up trail. Frodo and Sam journey by night down the slopes of Duath out into the dreadful waste of Gorgoroth.(34) [The grey cloaks of Lothlorien must be made more magical and efficacious. 'Are these garments magical?' asks Frodo. 'We do not know what you mean by magical,' said they. 'They have virtues: for they are elvish.' They were green and grey: their property is to blend perfectly with all natural surroundings: leaves, boughs, grass, water, stone. Unless a full light of sun was on them, and the wearer was moving or set against the sky, they were not invisible, but unnoticeable.](35) Far away they saw the underside of the Mountains stained red with the glow of Amarthon [written above: Dolamarth]: Mount Doom: the Mountain of Fire.(36) There is a constant rumble of thunder. Frodo feels the Eye. They come down a long ravine opening onto Gorgoroth beyond the south-east end of Kirith Ungol: it is end of road from Barad-dur to Morgul.(37) Great hideous cavern (38) pillars.