Michael Cox is Senior Commissioning Editor, Reference Books, at OUP and is currently compiling 'The Oxford Chronology of English Literature' on a freelance basis. His previous books for the Press include 'A Dictionary of Writers and Their Works', 'Victorian Ghost Stories' (with R. A. Gilbert), 'Victorian Detective Stories', and 'The Oxford Book of Twentieth-Century Ghost Stories'. R. A. Gilbert is a well-known antiquarian bookseller and a world authority on the historiography of esoteric thought in general, and on the occult currents of the nineteenth century in particular.