"You know that pen drawing of a brain on the wall above the desk in your study?" my wife said. "There's a single eye in the middle of it, and judging from the size of that eye, the brain seems a little smaller than normal. I wonder if that isn't a sketch of the other brain?" I did prize that sketch of a brain. It had been used as the frontispiece in a collection of essays that Professor W had published just after the war, On Madness and Other Matters, But, as far as I was consciously aware, I had placed the illustration in a wooden frame and hung it on the wall because I had been profoundly influenced by the following passage in that book: "There are those who say that great achievements are impossible in the absence of madness. That is untrue! Achievements enabled by madness are invariably accompanied by desolation and sacrifice. Truly great achievements are attained by humanistic individuals laboring honestly, tirelessly, humbly while acutely conscious, far more so than others, that they are susceptible to madness." --