No doubt I am a materialist. Agatha says that I am a rank one. I tell her that is an excellent reason for shortening our engagement, since I am in such urgent need of her spirituality. And yet I may claim to be a curious example of the effect of education upon temperament, for by nature I am, unless I deceive myself, a highly psychic man. I was a nervous, sensitive boy, a dreamer, a somnambulist, full of impressions and intuitions. My black hair, my dark eyes, my thin, olive face, my tapering fingers, are all characteristic of my real temperament, and cause experts like Wilson to claim me as their own. But my brain is soaked with exact knowledge. I have trained myself to deal only with fact and with proof. Surmise and fancy have no place in my scheme of thought. Show me what I can see with my microscope, cut with my scalpel, weigh in my balance, and I will devote a lifetime to its investigation. But when you ask me to study feelings, impressions, suggestions, you ask me to do what is distasteful and even demoralizing. A departure from pure reason affects me like an evil smell or a musical discord.