Ralph Hyde, formerly Keeper of Prints & Maps at Guildhall Library, London. Now freelance researcher and writer. His exhibitions include ‘Panoramania!’ at Barbican Art Gallery, and ‘Gilded Scenes and Shining Prospects’, Yale Center for British Art. His books include Panoramania! A Prospect of Britain; The Regent’s Park Colosseum; and (with Felix Barker) London As It Might Have Been.