It was a serious face: a furrowed brow beneath a rather incongruous beret, an aquiline nose, and a chin neither weak nor exceptionally strong. The gray eyes were gentle and academic in appearance He had that ageless look some middle-aged men acquire when their heads turn to silver or the gray of his long, flowing, slightly wavy hair. Around his lips a slight smile seemed to be playing. For all the world that smile reminded them at once of the Mona Lisa, the smile that had intrigued and bemused scholars of the ages.