The Silmarillion
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.