There came a time near dawn on the eve of spring, and Luthien danced upon a green hill; and suddenly she began to sing. Keen, heart-piercing was her song as the song of the lark that rises from the gates of night and pours its voice among the dying stars, seeing the sun behind the walls of the world; and the song of Luthien released the bonds of winter, and the frozen waters spoke, and flowers sprang from the cold earth where he feet had passed. Then the spell of silence fell from Beren, and he called to her, crying Tinuviel; and the woods echoed the name.