'Leon Bakst, Russian artist and designer and ballet impresario Serge Diaghilev, c1910. Bakst (1866-1924) (left) and Diaghilev (1872-1929) (centre) with unidentified others. Bakst is best known for the costume and set designs he produced for Diaghilev's famous itinerant ballet company, the Ballets Russes, founded in Paris in 1909. From a private collection.'