It was then that a real surprise began. So far as I could tell, my opening sentences were sufficiently conventional, but the way the class was affected by them was singular to a degree. Hardly had I reached the middle of the first one before all the students had their eyes fixed on me in a way that might possibly have been complimentary had not their expressions been so various and so peculiar. A few students wore a look of great relief--for all the world as if they had expected to find me dumb on that day, and were agreeably surprised to be disillusioned. A considerably larger number frowned displeasure, just as if I had disturbed them in the pursuit of something that was no affair of mine. But the large majority showed mere astonishment, and of that emotion, indeed, a good measure was written on the faces of all. I had no notion what to make of these unusual appearances. Inevitably my first thought was to glance furtively down at my clothes and shoes to see if everything was well in those departments. Also I raised my hand as unobtrusively as possible to discover whether perchance I had left my hair uncombed. In the absence of the mirror's final test I had to conclude that all was about as it should be. Naturally my next sentences hardly came trippingly from the tongue, nor did any alteration occur in my listeners to facilitate my labors. On the contrary, what had at first been mainly mere surprise upon their faces was growing rapidly to obvious merriment with about half of the class, and to evident disapprobation with the others. "The explanation of what we call the Enlightenment of the eighteenth century," I remember hurling at them with a fine generality of dream-eloquence, "is to be sought not so much in the influence of the doctrines of Descartes proper, or of those who could call themselves consistent Cartesians, as in the general dependence upon the guidance of human ratiocination, of which dependence he was only an illustrious example." This remarkable statement did not seem to offend any of my hearers, but neither did it mollify them. By a considerable effort, however, I was regaining a measure of composure, as I proceeded into my subject, in spite of all the frowners and all the titterers in the class. There was nothing to do, I felt, but to brave both parties, and in some degree, as the minutes dragged on, I seemed to be succeeding in the effort. At least there was less staring at me, and one after another the faces of my students were turned down to the desks, and pens began to course across pages in what appeared to me to be good note-taking fashion.