Sherlock Holmes is known for approaching all mysteries with cool logic - and yet when his creator Sir Arthur Conan Doyle saw photographs taken by two young girls purporting to show real life fairies at play... he unwisely declared them genuine. How did Elsie and Frances fool so many people with their photography... and why did they keep the hoax going for decades? For a full list of sources go to timharford.com If you’d like to keep up with the most recent news from this and other Pushkin podcasts be sure to sign up for our email list at Pushkin.fm.See omnystudio.com/listener for privacy information.