To my mother
Yoshiko Watanabe née Motoo

From the beginning I had promised myself that this book would be dedicated to my mother, but for various reasons inception of the idea to publication has taken nine years and as a result I should now have to say "to the memory of" instead of the simply "to" in my dedication.  Were it not for my mother's constant presence in my mind, however, I should never have completed this work and for this reason I have kept the simpler version.