Nienor meets Glaurung after the sack of Nargothrond...
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Nienor, being thrown by her steed, yet unhurt, made her awayback to Amon Ethir, there to await Mablung, and came thus above the reek into the sunlight; and look westward she stared straight into the eyes of Glaurung, whose head lay upon the hill top
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Sil. P.206