There are many people we wish to thank for their support in the course of writing this book. Work on the book began during 1992–3, with the help of a Large Research Grant from the Australian Research Council. We are grateful to the ARC for supporting this project from the outset. For his encouragement and enthusiasm about the project from the beginning, and for his helpful comments on the work in progress (especially in the early stages) we would like to thank Michael Smith.
