The Two Towers by J.R.R Tolkien (Harper Collins 1991, 2007) pp. 705-707

It was Gandalf who understood what was happening first. As the host of Rohan rode from Edoras to Helm’s Deep he saw a “darkness brooding about the feet of the Misty Mountains” and asked Legolas to describe what he could see.

“I can see a darkness. There are shapes moving in it, great shapes far away upon the banks of the river; but what they are I cannot tell. It is not mist or cloud that defeats my eyes: there is a veiling shadow that some power lays upon the land, and it marches slowly down stream. It is as if the twilight under endless trees were flowing downwards from the hills.”

The forest moves down from the mountains before Isengard.

At first Gandalf mistook one form of darkness for another, seeing them all as one kind and that kind the darkness of Mordor but as he pondered more he began to realise what he was seeing and so rode towards Isengard. There he asked Treebeard for the help of his Huorns and with them rode back to Helm’s Deep.

Later on Merry spoke of the Huorns to other members of the Fellowship.

“I think they are Ents that have become almost like trees” he said… “There is great power in them, and they seem to be able to wrap themselves in shadow: it is difficult to see them moving. But they do. They can move very quickly if they are angry. You stand still looking at the weather maybe, or listening to the rustling of the wind, and then suddenly you find that you are in the middle of a wood with great groping trees all around you.”

In Peter Jackson’s film he moved the encounter that Merry and Pippin had with Old Man Willow in the Old Forest to one with a Huorn in Fangorn.

And it is these trees, or perhaps we should call them Ent-trees, that Legolas described to Gandalf and that are now in the Deeping-coomb, the valley below the Hornburg. The hosts of Isengard stand at bay before foes on every side. Théoden and his riders drive them towards the Huorns who block their retreat and Erkenbrand and a thousand men upon foot march towards them, the remnants of a once defeated army that had stood at bay at the Fords of the Isen now victorious once more as they drive their foes before them. And Gandalf rides down upon them revealed for a moment in power and his enemies fall upon their faces in terror. For if there is one thing that orcs understand, perhaps the only thing, it is power. Just an hour before they had been a proud army serving a mighty wizard and about to storm a fortress that had never fallen when defended. Now they are surrounded by power on every side. At last they flee into the mysterious forest and are never seen again.

When Treebeard described Saruman as having a mind of “metal and wheels” who “does not care for living things” he was not merely expressing a difference in taste between himself and the wizard but something much more fundamental. When Saruman emptied Isengard of its defenders in order to conquer Rohan he had no idea of the threat that lay on his doorstep and the reason for this was that he did not care for living things. There are two senses of meaning in the word care that Treebeard used. One is the sense of care as responsibility and it is certainly true that Saruman has no sense of responsibility for living things. But the other sense is that he simply did not think about them very much at all. He assumed that his technology was more potent and effective than any living creature that he had encountered with the exception maybe of Sauron himself and in this he utterly underestimated the forest and its power.

It is one of the greatest feats of Tolkien’s imagination to have thought about how a forest might behave if it were to be able to perform its essential actions not as a plant but as an animal. And what might happen if the growing resentment that a forest might feel about its abuse and mistreatment by others suddenly spilled over. This forest has been abused by a wizard and by orcs for a long time and now, roused by two young hobbits, it takes revenge upon its enemies. Tolkien concentrates the revenge of the living world into a brief period of time. We know that our living planet may move much more slowly than this but if we choose to behave like orcs or fallen wizards in our relationship with life itself our planet will defend itself against us and will eventually win albeit after a conflict with terrible losses. Maybe one day we, like the hosts of Isengard, will be cowering before its latent power.

For a brief moment the forest takes control of the plains of Rohan. All can enter it only by permission and protected by Ents.