The sonata for clarinet and piano by Margaret Sutherland has been selected as the subject for this thesis from a substantial list of sonatas by Australian composers. The choice was for two reasons: the sonata is the earliest surviving work for the combination and while not a major work, it is at least a substantial work by one of Australia’s most important composers. The work is written in a contemporary musical style, typical of its composer, so that it sounds fresh and musically challenging even in today’s musical environment.