 From the conventional forms of his early music, over the course of his creative career Delius developed a style easily recognisable and "unlike the work of any other", according to Payne.As he gradually found his voice, Delius replaced the methods developed during his creative infancy with a more mature style in which Payne discerns "an increasing richness of chord structure, bearing with it its own subtle means of contrast and development".Hubert Foss, the Oxford University Press's musical editor during the 1920s and 1930s, writes that rather than creating his music from the known possibilities of instruments, Delius "thought the sounds first" and then sought the means for producing these particular sounds.