Celebrated detective Sherlock Holmes is on the case for the next production of Robin Hood Theatre Company. The famous sleuth is brought to life on the Robin Hood stage at Averham next week in The Sign Of Four. Sir Arthur Conan Doyle’s epic second Holmes novel has been adapted for stage by Nick Lane. Theshow imaginatively juggles a multitude of characters, rapidly switching between scenes set in Victorian London, Imperial India and the wharves and waterways of the river Thames. Sherlock is bored and listless when Mary Morstan arrives at Baker Street seeking help after the mysterious disappearan…