have never seen a photo of him smiling (Duchenne or otherwise). Wittgenstein was melancholy, irascible, scathingly critical of everyone around him, and even more critical of himself. In a typical seminar held in his cold and barely furnished Cambridge rooms, he would pace the floor, muttering audibly, “Wittgenstein, Wittgenstein, what a terrible teacher you are.” Yet his last words give the lie to happiology. Dying alone in a garret in Ithaca, New York, he said to his landlady, “Tell them it’s been wonderful!”