London, 1931.          The night before an exhibition of his artwork opens at a famed Mayfair gallery, the controversial artist Nick Bassington-Hope falls to his death. The police rule it an accident, but Nick's twin sister, Georgina, a wartime journalist and a controversial figure in her own right, isn't so sure.         When the authorities refuse to consider her theory that Nick was murdered, Georgina seeks out an old classmate from Girton College, Maisie Dobbs, psychologist and investigator, for help. Nick was a veteran of World War I, and before long the case leads Maisie to the desolate beaches of Dungeness in Kent, and into the sinister underbelly of the city's art world.          Following up on the bestselling Pardonable Lies , Jacqueline Winspear here delivers another vivid, thrilling and utterly unique episode in the life of Maisie Dobbs.