In Lovecraft's vision we live in a deep, but fragile illusion, unable to comprehend the ancient beings, such as the Cthulhu who lies dead but dreaming in the submerged city of R'lyeh, waiting to rise then wreak havoc on our realm of existence.Lovecraft used the mythos to create a background to his fiction, and challenged many writer companions to add their own stories. Clark Ashton Smith, Robert E. Howard, Robert Bloch, Frank Belknap Long, Henry Kuttner were amongst the first but over the years many others such as Ramsey Campbell, Lin Carter and August Derleth added their voices to the many mythic cycles, developing themes and new fictional pathways for the town of Arkham, and the creatures Azathoth and Nyarlathotep.