Watch BBC Documentaries online: Episode 40 The Man Behind Masquerade

In 1979, artist Kit Williams turned Britain into a giant treasure map, promising a golden hare, buried in the earth, to the first person who solved the riddle of his book Masquerade. The hysteria that followed the hunt drove Williams underground, where he has continued to create complex and beautiful art, which he refuses to publicly exhibit. In his first interview in two decades, Kit lifts the lid on life before and after Masquerade. Did the hare deprive us of one of our most gifted painters?

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