Tufte is equal parts historian, critic, and traveling revival preacher. For a few days each month, he goes on the road to teach a course called “Presenting Data and Information” in hotel ballrooms and convention centers. One afternoon, shortly after his meeting with Devaney, Tufte was teaching his course in the downstairs ballroom at the Marriott hotel in Seattle, Washington. There were 400 people in the crowd. Tufte, who is sixty-nine, and has a thinning slash of silver hair and a pair of wire-rimmed glasses that hang off his nose, was standing at the front of the room. He was wearing a wireless microphone, and held a copy of a small map above his head.
(Full Story: Edward Tufte, The Information Sage – The Washington Monthly Magazine)