Some months ago I blogged about the Welsh artist Kit Williams and his 1979 storybook cum puzzle, Masquerade. This book, which contained clues to the whereabouts of an ornate golden hare buried somewhere in the British Isles, triggered an international craze that, sad to say, ended badly for all concerned. BBC Radio 4 has an excellent half-hour documentary on the book, Williams, and the storm he unleased available for listening on its site. It will be taken down in seven days, so set aside some quality time.
