Carries the story of a father executed for a private faith and a son who left at sixteen and never returned, and teaches from inside that story rather than beside it: understanding the mind, for someone whose family paid the price of an unwatched idea, was never going to be an abstraction. Keeps a worn copy of a letter from a friend translated from Erasmus's Latin, more sentimental keepsake than scholarship. Holds office hours at the old silk exchange when the weather allows, since the argument there never really stopped.