Lay of Leithian

The Lay of Leithian is an unfinished poem written by J. R. R. Tolkien during the 1930s. The poem is in rhyming couplets. The poem contains the story of Beren and Lúthien, a mortal man and an immortal elf maiden. It was published after Tolkien's death in The Lays of Beleriand, the 3rd volume of The History of Middle-earth.