The scale also may be found in the music of Claude Debussy and Maurice Ravel. Melodic phrases that move by alternating tones and semitones frequently appear in the works of both these composers. Allen identifies a five-note segment in the cor anglais melody heard near the start of Debussy's "Nuages" from his orchestral suite "Nocturnes" as octatonic. Mark describes "Nuages" as "arguably [Debussy's] boldest single leap into the musical unknown. 'Nuages' defines a kind of tonality never heard before, based on the centricity of a diminished tonic triad (B-D-F natural)." According to Stephen Walsh, the cor anglais theme "hangs in the texture like some motionless object, always the same and always at the same pitch" . There is a particularly striking and effective use of the octatonic scale in the opening bars of Liszt's late piece "Bagatelle sans tonalité" from 1885.