The Lord of the Rings

Suddenly they were aware that everything was very quiet; the whole forest stood in listening silence. Of course, the Ent-voices had stopped. What did that mean? Bregalad was standing up erect and tense, looking back northwards towards Derndingle.
    Then with a crash came a great ringing shout:
ra-hoom-rah!
The trees quivered and bent as if a gust had struck them. There was another pause, and then a marching music began like solemn drums, and above the rolling beats and booms there welled voices singing high and strong.
    We come, we come with roll of drum: ta-runda runda runda rom!
     
    The Ents were coming: ever nearer and louder rose their song:
    We come, we come with horn and drum: ta-runa runa runa rom!
     
    Bregalad picked up the hobbits and strode from his house.
    Before long they saw the marching line approaching: the Ents were swinging along with great strides down the slope towards them. Treebeard was at their head, and some fifty followers were behind him, two abreast, keeping step with their feet and beating time with their hands upon their flanks. As they drew near the flash and flicker of their eyes could be seen.
    ‘Hoom, hom! Here we come with a boom, here we come at last!’ called Treebeard when he caught sight of Bregalad and the hobbits. ‘Come, join the Moot! We are off. We are off to Isengard!’
    ‘To Isengard!’ the Ents cried in many voices.
    ‘To Isengard!’
To Isengard! Though Isengard be ringed and barred with doors of stone;
Though Isengard be strong and hard, as cold as stone and bare as bone,
We go, we go, we go to war, to hew the stone and break the door;
For bole and bough are burning now, the furnace roars – we go to war!
To land of gloom with tramp of doom, with roll of drum, we come, we come;
To Isengard with doom we come!
With doom we come, with doom we come!
     
    So they sang as they marched southwards.
    Bregalad, his eyes shining, swung into the line beside Treebeard. The old Ent now took the hobbits back, and set them on his shoulders again, and so they rode proudly at the head of the singing company with beating hearts and heads held high. Though they had expected something to happen eventually, they were amazed at the change that had come over the Ents. It seemed now as sudden as the bursting of a flood that had long been held back by a dike.
    ‘The Ents made up their minds rather quickly, after all, didn’t they?’ Pippin ventured to say after some time, when for a moment the singing paused, and only the beating of hands and feet was heard.
    ‘Quickly?’ said Treebeard. ‘Hoom! Yes, indeed. Quicker than I expected. Indeed I have not seen them roused like this for many an age. We Ents do not like being roused; and we never are roused unless it is clear to us that our trees and our lives are in great danger. That has not happened in this Forest since the wars of Sauron and the Men of the Sea. It is the orc-work, the wanton hewing –
rárum
– without even the bad excuse of feeding the fires, that has so angered us; and the treachery of a neighbour, who should have helped us.Wizards ought to know better: they do know better. There is no curse in Elvish, Entish, or the tongues of Men bad enough for such treachery. Down with Saruman!’
    ‘Will you really break the doors of Isengard?’ asked Merry.
    ‘Ho, hm, well, we could, you know! You do not know, perhaps, how strong we are. Maybe you have heard of Trolls? They are mighty strong. But Trolls are only counterfeits, made by the Enemy in the Great Darkness, in mockery of Ents, as Orcs were of Elves. We are stronger than Trolls. We are made of the bones of the earth. We can split stone like the roots of trees, only quicker, far quicker, if our minds are roused! If we are not hewn down, or destroyed by fire or blast of sorcery, we could split Isengard into splinters and crack its walls into rubble.’
    ‘But Saruman will try to stop you, won’t he?’
    ‘Hm, ah, yes, that is so. I have not forgotten it. Indeed I have thought long about it. But, you see, many of the Ents are younger than I am, by many lives of trees. They are all roused now, and their mind is all on one thing: breaking Isengard. But they will start thinking again before long; they will cool down a little, when we take our evening drink. What a thirst we shall have! But let them march now and sing! We have a long way to go, and there is time ahead for thought. It is something to have started.’
    Treebeard marched on, singing with the others for a