As we embark on a journey through the paintings and drawings in this volume, let us put ourselves in the place of the Rhine daughter in the painting Window.    Blues and reds are lighted by the rising yellow sun, and the girl looks out to the stories that will unfold from these colors in the day ahead.   From day to day and age to age, Rhine daughters contend with the primary colors from which they were born, building from them their houses and pathways.  While a countless variety of stories may unfold, the three primary colors are the unchanging center of their creation.