Now therefore Mablung, as he had said, commanded his ten riders to keep Morwen and Niënor on the hill-top, and not to stir thence until he returned, unless some great peril arose: and if that befell, the riders should set Morwen and Niënor in their midst and flee as swiftly as they might, east-away towards Doriath, sending one ahead to bring news and seek aid.
Then Mablung took the other score of his company, and they crept down from the hill; and then passing into the fields westward, where trees were few, they scattered and made each his way, daring but stealthy, to the banks of Narog. Mablung himself took the middle way, going towards the bridge, and so came to its hither end and found it all broken down; and the deep-cloven river, running wild after rains far away northward, was foaming and roaring among the fallen stones.
But Glaurung lay there, just within the shadow of the great passage that led inward from the ruined Doors, and he had long been aware of the spies, though few other eyes in Middle-earth would have discerned them. But the glance of his fell eyes was keener than that of the eagles, and outreached the far sight of the Elves; and indeed he knew also that some remained behind and sat upon the bare top of Amon Ethir.
Thus, even as Mablung crept among the rocks, seeking whether he could ford the wild river upon the fallen stones of the bridge, suddenly Glaurung came forth with a great blast of fire, and crawled down into the stream. Then straightway there was a vast hissing and huge vapours arose, and Mablung and his followers that lurked near were engulfed in a blinding steam and foul stench; and the most fled as best they could guess towards the Spyhill. But as Glaurung was passing over Narog, Mablung drew aside and lay under a rock, and remained; for it seemed to him that he had an errand yet to do. He knew now indeed that Glaurung abode in Nargothrond, but he was bidden also to learn the truth concerning Húrin’s son, if he might; and in the stoutness of his heart, therefore, he purposed to cross the river, as soon as Glaurung was gone, and search the halls of Felagund. For he thought that all had been done that could be for the keeping of Morwen and Niënor: the coming of Glaurung would be marked, and even now the riders should be speeding towards Doriath.
Glaurung therefore passed Mablung by, a vast shape in the mist; and he went swiftly, for he was a mighty Worm, and yet lithe. Then Mablung behind him forded Narog in great peril; but the watchers upon Amon Ethir beheld the issuing of the Dragon, and were dismayed. At once they bade Morwen and Niënor mount, without debate, and prepared to flee eastward as they were bidden. But even as they came down from the hill into the plain, an ill wind blew the great vapours upon them, bringing a stench that no horses would endure. Then, blinded by the fog and in mad terror of the dragon-reek, the horses soon became ungovernable, and went wildly this way and that; and the guards were dispersed, and were dashed against trees to great hurt, or sought vainly one for another. The neighing of the horses and the cries of the riders came to the ears of Glaurung; and he was well pleased.
One of the Elf-riders, striving with his horse in the fog, saw suddenly the Lady Morwen passing near, a grey wraith upon a mad steed, but she vanished in the mist, crying Niënor, and they saw her no more.
But when the blind terror came upon the riders, Niënor’s horse, running wild, stumbled, and she was thrown. Falling softly into grass she was unhurt; but when she got to her feet she was alone: lost in the mist without horse or companion. Her heart did not fail her, and she took thought; and it seemed to her vain to go towards this cry or that, for cries were all about her, but growing ever fainter. Better it seemed to her in such case to seek again for the hill: thither doubtless Mablung would come before he went away, if only to be sure that none of his company had remained there.
Therefore walking at guess she found the hill, which was indeed close at hand, by the rising of the ground before her feet; and slowly she climbed the path that led up from the east. And as she climbed so the fog grew thinner, until she came at last out into the sunlight on the bare summit. Then she stepped forward and looked westward. And there right before her was the great head of Glaurung, who had even then crept up from the other side; and before she was aware her eyes had looked in the fell spirit of his eyes, and they were terrible, being filled with the fell spirit of Morgoth, his master.
Strong was the will and heart of Niënor, and she strove against Glaurung; but he put forth his power against her. ‘What seek you here?’ he said.
And constrained to answer she said: ‘I do but seek one Túrin that dwelt here a while. But he is dead, maybe.’
‘I know not,’ said Glaurung. ‘He was left here to defend the women and weaklings; but when I came he deserted them and fled. A boaster but a craven, it seems. Why seek you such a one?’
‘You lie,’ said Niënor. ‘The children of Húrin at least are not craven. We fear you not.’
Then Glaurung laughed, for so was Húrin’s daughter revealed to his malice. ‘Then you are fools, both you and your brother,’ said he. ‘And your boast shall be made vain. For I am Glaurung!’
Then he drew her eyes into his, and her will swooned. And it seemed to her that the sun sickened and all became dim about her; and slowly a great darkness drew down on her and in that darkness there was emptiness; she knew nothing, and heard nothing, and remembered nothing.
Long Mablung explored the halls of Nargothrond, as well he might for the darkness and the stench; but he found no living thing there: nothing stirred among the bones, and none answered his cries. At last, being oppressed by the horror of the place, and fearing the return of Glaurung, he came back to the Doors. The sun was sinking west, and the shadows of the Faroth behind lay dark on the terraces and the wild river below; but away beneath Amon Ethir he descried, as it seemed, the evil shape of the Dragon. Harder and more perilous was the return over Narog in such haste and fear; and scarcely had he reached the east shore and crept aside under the bank when Glaurung drew nigh. But he was slow now and stealthy; for all the fires in him were burned low: great power had gone out of him, and he would rest and sleep in the dark. Thus he writhed through the water and slunk up to the Doors like a huge snake, ashen-grey, sliming the ground with his belly.
But he turned before he went in and looked back eastward, and there came from him the laughter of Morgoth, dim but horrible, as an echo of malice out of the black depths far away. And this voice, cold and low, came after: ‘There you lie like a vole under the bank, Mablung the mighty! Ill do you run the errands of Thingol. Haste you now to the hill and see what is become of your charge!’