Members of the faculty, parents, guests, and graduates, have no fear. I am well aware that on a day of such high excitement, what you require, first and foremost, of any speaker is brevity. I shall not fail you in this respect. There are exactly eighty-five sentences in my speech, four of which you have just heard. It will take me about twelve minutes to speak all of them and I must tell you that such economy was not easy for me to arrange, because I have chosen as my topic the complex subject of your ancestors. Not, of ...