Mystery 101. How history hungers for the shape of myth; how the plots and characters of fable and romance come to inhabit real courts and counting-houses and cathedrals; how old sciences die, and bequeath their myths and magic to their successors; how the heroes of legend pass away, fall asleep, are resurrected, and enter ordinary daylit history, persisting as a dream persists into waking life, altering and transforming it even when the dream itself has been forgotten or repressed.