ACKNOWLEDGEMENTS

I am deeply grateful to Li Rongxi for giving generously of his broad, profound and many-sided scholarship in removing errors from this version and resolving problems. I am also greatly indebted to the staff of the Foreign Language Press, and especially to Huang Jingying for the infinite patience and care with which she has checked and improved typescript and proofs. Responsibility for the many remaining mistakes is mine.

W.J.F. J.