Among the works composed by Bush during this period were the Quartet for piano, violin, viola and cello, Op. 5; Prelude and Fugue for piano, Op. 9; settings of poems by Walter de la Mare, Harold Monro and W. B. Yeats; and his first venture into orchestral music, the Symphonic Impressions of 1926–27, Op. 8. In early 1929 he completed one of his best-known early chamber works, the string quartet "Dialectic", Op. 15, which helped to establish Bush's reputation abroad when it was performed at a Prague festival in the 1930s.