Queen Mary’s dolls’ house is the largest and most famous dolls’ house in the world. Built in the 1920s it contains tiny books made by authors including JM Barrie who wrote Peter Pan and Sherlock Holmes creator Sir Arthur Conan Doyle. This gallery tells the story of the 503-word Sherlock Holmes story How Watson Learned The Trick which Sir Arthur created for the Dolls’ house – and which has now been reproduced by Walker Books and the Royal Collection Trust