They stood on a wet floor of polished stone, the doorstep, as it were, of a rough-hewn gate of rock opening dark behind them. But in front a thin veil of water was hung, so near that Frodo could have put an outstretched arm into it. It faced westward. The level shafts of the setting sun behind beat upon it, and the red light was broken into many flickering beams of ever-changing colour. It was as if they stood at the window of some elven-tower, curtained with threaded jewels of silver and gold, and ruby, sapphire and amethyst, all kindled with an unconsuming fire.
