The Lay of Leithian
（重定向自Leithian）
The Lay of Leithien is an unfinished poem written by J. R. R. Tolkien. It tells the Tale of Beren and Lúthien, the story of the love of the mortal Man Beren and the immortal Elf maiden Lúthien. The poem consists of over 4200 verses. It was published after Tolkien's death in The Lays of Beleriand. Its precedents are found in the Welsh tale of Culhwch and Olwen in the manuscripts, the Red Book of Hergest and the earlier White Book of Rhydderch.