he first chapter outlines the background to the composer's compositional technique. It provides a basis for discussing the definition of folk and traditional music and highlights two differing uses, by other composers, of the folk music idiom within the art music context. The next chapter deals with some particular aspects of composition related to the portfolio works. Techniques such as the use of simultaneous tempi and the application of change ringing systems are discussed. The third chapter focuses on each of the three portfolio works and the final chapter deals with the new areas of composition that have been suggested to the composer by the work on this portfolio. It should be stressed that the second and third chapters should be read...