English: Diagram of more or less inclusive definitions of "Tolkien's Legendarium", from John Rateliffe's narrow definition via "all Silmarillion writings" to "all Tolkien's Middle-earth writings", though even then, other non-narrative materials like his paintings, runes, scripts, and the extensive materials on his invented languages (not to mention all the prologues and appendices, with timelines and tables) may not be included.