§ Of Maeglin The Silmarillion

Now the traffic of the Dwarves down from the Blue Mountains followed two roads across East Beleriand, and the northern way, going towards the Fords of Aros, passed nigh to Nan Elmoth; and there Eöl would meet the Naugrim and hold converse with them. And as their friendship grew he would at times go and dwell as guest in the deep mansions of Nogrod or Belegost There he learned much of metalwork, and came to great skill therein; and he devised a metal as hard as the steel of the Dwarves, but so malleable that he could make it thin and supple; and yet it remained resistant to all blades and darts. He named it galvorn, for it was black and shining like jet, and he was clad in it whenever he went abroad. But Eöl, though stooped by his smithwork, was no Dwarf, but a tall Elf of a high kin of the Teleri, noble though grim of face; and his eyes could see deep into shadows and dark places. And it came to pass that he saw Aredhel Ar-Feiniel as she strayed among the tall trees near the borders of Nan Elmoth, a gleam of white in the dim land. Very fair she seemed to him, and he desired her; and he set his enchantments about her so that she could not find the ways out, but drew ever nearer to his dwelling in the depths of the wood. There were his smithy, and his dim halls, and such servants as he had, silent and secret as their master. And when Aredhel, weary with wandering, came at last to his doors, he revealed himself; and he welcomed her, and led her into his house. And there she remained; for Eöl took her to wife, and it was long ere any of her kin heard of her again.