The Silmarillion

In that time Thingol turned to Melian; but now she withheld her counsel from him, saying that the doom that he had devised must work to its appointed end, and that he must wait now upon time. But Thingol learned that Lúthien had journeyed far from Doriath, for messages came secretly from Celegorm, as has been told, saying that Felagund was dead, and Beren was dead, but Lúthien was in Nargothrond, and that Celegorm would wed her. Then Thingol was wrathful, and he sent forth spies, thinking to make war upon Nargothrond; and thus he learned that Lúthien was again fled, and that Celegorm and Curufin were driven from Nargothrond. Then his counsel was in doubt, for he had not the strength to assail the seven sons of Fëanor; but he sent messengers to Himring to summon their aid in seeking for Lúthien, since Celegorm had not sent her to the house of her father, nor had he kept her safely.

But in the north of his realm his messengers met with a peril sudden and unlooked for: the onslaught of Carcharoth, the Wolf of Angband. In his madness he had run ravening from the north, and passing at length over Taur‑nu-Fuin upon its eastern side he came down from the sources of Esgalduin like a destroying fire. Nothing hindered him, and the might of Melian upon the borders of the land stayed him not; for fate drove him, and the power of the Silmaril that he bore to his torment. Thus he burst into the inviolate woods of Doriath, and all fled away in fear. Alone of the messengers Mablung, chief captain of the King, escaped, and he brought the dread tidings to Thingol.

Even in that dark hour Beren and Lúthien returned, hastening from the west, and the news of their coming went before them like a sound of music borne by the wind into dark houses where men sit sorrowful. They came at last to the gates of Menegroth, and a great host followed them. Then Beren led Lúthien before the throne of Thingol her father; and he looked in wonder upon Beren, whom he had thought dead; but he loved him not, because of the woes that he had brought upon Doriath. But Beren knelt before him, and said: 'I return according to my word. I am come now to claim my own.'

And Thingol answered: 'What of your quest, and of your vow?'

But Beren said: 'It is fulfilled. Even now a Silmaril is in my hand.'

Then Thingol said: 'Show it to me!'

And Beren put forth his left hand, slowly opening its fingers; but it was empty. Then he held up his right arm; and from that hour he named himself Camlost, the Empty-handed.

Then Thingol's mood was softened; and Beren sat before his throne upon the left, and Lúthien upon the right, and they told all the tale of the Quest, while all there listened and were filled with amazement. And it seemed to Thingol that this Man was unlike all other mortal Men, and among the great in Arda, and the love of Lúthien a thing new and strange; and he perceived that their doom might not be withstood by any power of the world. Therefore at the last he yielded his will, and Beren took the hand of Lúthien before the throne of her father.

But now a shadow fell upon the joy of Doriath at the return of Lúthien the fair; for learning of the cause of the madness of Carcharoth the people grew the more afraid, perceiving that his danger was fraught with dreadful power because of the holy jewel, and hardly might be overthrown. And Beren, hearing of the onslaught of the Wolf, understood that the Quest was not yet fulfilled.

Therefore, since daily Carcharoth drew nearer to Menegroth, they prepared the Hunting of the Wolf; of all pursuits of beasts whereof tales tell the most perilous. To that chase went Huan the Hound of Valinor, and Mablung of the Heavy Hand, and Beleg Strongbow, and Beren Erchamion, and Thingol King of Doriath. They rode forth in the morning and passed over the River Esgalduin; but Lúthien remained behind at the gates of Menegroth. A dark shadow fell upon her and it seemed to her that the sun had sickened and turned black.

The hunters turned east and north, and following the course of the river they came at last upon Carcharoth the Wolf in a dark valley, down the northern side whereof Esgalduin fell in a torrent over steep falls. At the foot of the falls Carcharoth drank to ease his consuming thirst, and he howled, and thus they were aware of him, But he, espying their approach, rushed not suddenly to attack them. It may be that the devil's cunning of his heart awoke, being for a moment eased of his pain by the sweet waters of Esgalduin; and even as they rode towards him he slunk aside into a deep brake, and there lay hid. But they set a guard about all that place, and waited, and the shadows grew long in the forest.