Then Sauron stripped from the their disguise, and they stood before him naked and afraid. But though their kinds were revealed, Sauron could not discover their names or their purposes.
He cast them therefore into a deep pit, dark and silent, and threatened to slay them cruel, unless one would betray the truth to him. From time to time they saw two eyes kindled in the dark, and a werewolf devoured one of the companions; but none betrayed their lord.
In the time when Sauron cast Beren into the pit a weight of horror came upon Lúthien's heart; and going to Melian for counsel she learned that Beren lay in the dungeons of Tol-in-Gaurhoth without hope of rescue. Then Lúthien, perceiving that no help would come from any other on earth, resolved to fly from Doriath and come herself to him; but she sought the aid of Daeron, and he betrayed her purpose because he would not deprive Lúthien of the lights of heaven, lest she fail and fade, and yet would restrain her, he caused a house to be built from which she should not escape. Not far from the gates of Menegroth stood the greatest of all the trees in the Forest of Neldoreth; and that was a beech-forest and the northern half of the kingdom. This mighty beech was named Hírilorn, and it had three trunks, equal in girth, smooth in rind, and exceeding tall; no branches grew from them for a great height above the ground. Far aloft between the shafts of Hírilorn a wooden house was built, and there Lúthien was made to dwell; and ladders were taken away and guarded, save only when the servants of Thingol wrought her such things as she needed.
It is told in the Lay of Leithian how she escaped from the house in Hírilorn; for she put forth her arts of enchantment, and caused her hair to grow to great length, and of it she wove a dark robe that wrapped her beauty like a shadow, and it was laden with a spell of sleep. Of the strands that remained she twined a rope, and she let it down from her window; and as the end swayed above the guards that sat beneath the house they fell into a deep slumber. Then Lúthien climbed from her prison, and shrouded in her shadowy cloak she escaped from all eyes, and vanished out of Doriath.
