The Lord of the Rings

it mounted, it caught the rays of the sinking moon, and spread in shimmering billows, black and silver, over the starry sky.
    ‘What do you think of that, Gandalf?’ asked Aragorn. ‘One would say that all the Wizard’s Vale was burning.’
    ‘There is ever a fume above that valley in these days,’ said Éomer: ‘but I have never seen aught like this before. These are steams rather than smokes. Saruman is brewing some devilry to greet us. Maybe he is boiling all the waters of Isen, and that is why the river runs dry.’
    ‘Maybe he is,’ said Gandalf. ‘Tomorrow we shall learn what he is doing. Now let us rest for a while, if we can.’
    They camped beside the bed of the Isen river; it was still silent and empty. Some of them slept a little. But late in the night the watchmen cried out, and all awoke. The moon was gone. Stars were shining above; but over the ground there crept a darkness blacker than the night. On both sides of the river it rolled towards them, going northward.
    ‘Stay where you are!’ said Gandalf. ‘Draw no weapons! Wait! and it will pass you by!’
    A mist gathered about them. Above them a few stars still glimmered faintly; but on either side there arose walls of impenetrable gloom; they were in a narrow lane between moving towers of shadow. Voices they heard, whisperings and groanings and an endless rustling sigh; the earth shook under them. Long it seemed to them that they sat and were afraid; but at last the darkness and the rumour passed, and vanished between the mountain’s arms.
    Away south upon the Hornburg, in the middle night men heard a great noise, as a wind in the valley, and the ground trembled; and all were afraid and no one ventured to go forth. But in the morning they went out and were amazed; for the slain Orcs were gone, and the trees also. Far down into the valley of the Deep the grass was crushed and trampled brown, as if giant herdsmen had pastured great droves of cattle there; but a mile below the Dike a huge pit had been delved in the earth, and over it stones were piled into a hill. Men believed that the Orcs whom they had slain were buried there; but whether those who had fled into the wood were with them, none could say, for no man ever set foot upon that hill. The Death Down it was afterwards called, and no grass would grow there. But the strange trees were never seen in Deeping-coomb again; they had returned at night, and had gone far away to the dark dales of Fangorn. Thus they were revenged upon the Orcs.
    The king and his company slept no more that night; but they saw and heard no other strange thing, save one: the voice of the river beside them suddenly awoke. There was a rush of water hurrying down among the stones; and when it had passed, the Isen flowed and bubbled in its bed again, as it had ever done.
    At dawn they made ready to go on. The light came grey and pale, and they did not see the rising of the sun. The air above was heavy with fog, and a reek lay on the land about them. They went slowly, riding now upon the highway. It was broad and hard, and well-tended. Dimly through the mists they could descry the long arm of the mountains rising on their left. They had passed into Nan Curunír, the Wizard’s Vale. That was a sheltered valley, open only to the South. Once it had been fair and green, and through it the Isen flowed, already deep and strong before it found the plains; for it was fed by many springs and lesser streams among the rain-washed hills, and all about it there had lain a pleasant, fertile land.
    It was not so now. Beneath the walls of Isengard there still were acres tilled by the slaves of Saruman; but most of the valley had become a wilderness of weeds and thorns. Brambles trailed upon the ground, or clambering over bush and bank, made shaggy caves where small beasts housed. No trees grew there; but among the rank grasses could still be seen the burned and axe-hewn stumps of ancient groves. It was a sad country, silent now but for the stony noise of quick waters. Smokes and steams drifted in sullen clouds and lurked in the hollows. The riders did not speak. Many doubted in their hearts, wondering to what dismal end their journey led.
    After they had ridden for some miles, the highway became a wide street, paved with great flat stones, squared and laid with skill; noblade of grass was seen in any joint. Deep gutters, filled with trickling water, ran down on either side. Suddenly a tall pillar loomed up before them. It was black;