<p>When Tinker Bell followed Peter Pan to Hollywood in the 1950s, fairies vanished into the realm of child-lore. Yet in 1923 30-yearold J.R.R. Tolkien's visit to his aunt's house Bag's End inspired a story about hedgerowfairies or 'Hobbits', and three years earlier Sherlock-Holmes author Arthur Conan Doyle published the Cottingley fairy photographs. In Ireland, a generation before, family members had torched a woman to death thinking she was a fa...