fewer than The Hobbit and The Lord of the Rings which have each sold over 100 million copies. Its sales were sufficient for it to reach the top of the October 1977 lists. It has since been translated into at least 40 languages. Concept and creation Development Tolkien began working on the stories that would become The Silmarillion in 1914. He intended them to become an English mythology that would explain the origins of English history and culture. Much of this early work was written while Tolkien, then a British officer returned from France during World War I, was in hospital and on sick leave. He completed the first story, "The Fall of Gondolin", in late 1916. He called his collection of nascent stories The Book of Lost Tales. This became the name for the first two volumes of The History of Middle-earth, a book series by Christopher Tolkien which include these early texts. The stories employ the narrative framing device of a mariner named Eriol (in later versions, an Anglo-Saxon named Ælfwine) who finds the island of Tol Eressëa, where the Elves live, and the Elves tell him their history. In "The Cottage of Lost Play", Tol Eressëa, corresponding to England, or in early versions Kortirion, corresponding to Warwick, linked the tales to England's lost mythology. Tolkien never completed The Book of Lost Tales; he left it to compose the poems "The Lay of Leithian" and "The Lay of the Children of Húrin". The first version of The Silmarillion was the "Sketch of the Mythology" written in 1926 (later published in Volume IV of The History of Middle-earth). The "Sketch" was a 28-page synopsis written to explain the background of the story of Túrin to R. W. Reynolds, a friend to whom Tolkien had sent several of the stories. From the "Sketch", Tolkien developed a fuller narrative version of The Silmarillion called Quenta Noldorinwa (also included in Volume IV). The Quenta Noldorinwa was the last version of The Silmarillion that Tolkien completed. In 1937, encouraged by the success of The Hobbit, Tolkien submitted to his publisher George Allen & Unwin an incomplete but more fully developed version of The Silmarillion called Quenta Silmarillion, but they rejected the work as being obscure and "too Celtic". The publisher instead asked Tolkien to write a sequel to The Hobbit. Tolkien began to revise The Silmarillion, but soon turned to the sequel, which