THERE COMES a time in every author’s life when she has to accept she may not have made the absolute best possible decision. And the day when I blithely promised ten thousand words on a goddess who is barely mentioned in any ancient source, who makes no dent on the Renaissance, who has inspired virtually no classical composers, no modern artists, nor even any philhellenic sci-fi writers to create work inspired by her? That may turn out to have been just such a time.