§ Of Túrin Turambar The Silmarillion

Seeing the onset of the dragon the guards upon Amon Ethir sought to lead Morwen and Nienor away, and fly with them with all speed back eastwards; but the wind bore the blank mists upon them, and their horses were maddened by the dragon-stench, and were ungovernable, and ran this way and that, so that some were dashed against trees and were slain, and others were borne far away. Thus the ladies were lost, and of Morwen indeed no sure tidings came ever to Doriath after. But Nienor, being thrown by her steed, yet unhurt, made her way back to Amon Ethir, there to await Mablung, and came thus above the reek into the sunlight; and looking westward she stared straight into the eyes of Glaurung, whose head lay upon the hill-top.