During the 1920s, Walton earned some money playing the piano at jazz clubs, but he spent most of his time composing in the Sitwells' . The orchestral overture "Portsmouth Point" (which he dedicated to Sassoon) was the first work which shows Walton’s real style. In 1929 the Viola Concerto started to make him really famous. This was followed by "Belshazzar's Feast" (1931), the Symphony No. 1 (1935), the coronation march "Crown Imperial" (1937), and the Violin Concerto (1939). All these works are very popular today.