§ Of Maeglin The Silmarillion

But Aredhel, having sought in vain for her companions, rode on, for she was fearless and hardy of heart, as were all the children of Finwë; and she held on her way, and crossing Esgalduin and Aros came to the land of Himlad between Aros and Celon where Celegorm and Curufin dwelt in those days, before the breaking of the Siege of Angband. At that time they were from home, riding with Caranthir east in Thargelion; but the people of Celegorm welcomed her and bade her stay among them with honour until their lord's return. There for a while she was content, and had great Joy in wandering free in the woodlands; but as the year lengthened and Celegorm did not return, she became restless again, and took to riding alone ever further abroad, seeking for new paths and untrodden glades. Thus it chanced in the waning of the year that Aredhel came to the south of Himlad, and passed over Celon; and before she was aware she was enmeshed in Nan Elmoth.