but she said : `` ay , sad indeed is my heart , for i am mavwin , mother of those twain , '' and that man perceived that not yet had that long tale of sorrow reached its ending -- but mavwin arose and went out into the woods crying in anguish , and for long time she haunted that spot so that the woodman and his folk fled and came never back , and none may say whether indeed it was mavwin that came there or her dark shade that sought not back to mandos by reason of her great unhappiness . ''