A Mirkwood appears in several places in J. R. R. Tolkien's writings, among several forests that play important roles in his storytelling. Projected into Old English, it appears as Myrcwudu in his The Lost Road, as a poem sung by Ælfwine. He used the name Mirkwood in another unfinished work, The Fall of Arthur. But the name is best known and most prominent in his Middle-earth legendarium, where it appears as two distinct forests, one in the First Age in Beleriand, as described in The Silmarillion, the other in the Third Age in Rhovanion, as described in both The Hobbit and The Lord of the Rings.