"He screamed again and again, but whenever he did so the black paws tickled him with greater subtlety. Then he saw a sort of grey phosphorescence about, and guessed they were coming even to that inner world of subterrene horror of which dim legends tell, and which is litten only by the pale death-fire wherewith reeks the ghoulish air and the primal mists of the pits at earth's core."
- H.P.Lovecraft, The Dream-Quest of Unknown Kadath