My next and highest duty was giving lectures to the senior class and students from the law school. Into this I threw myself heartily, and soon had the satisfaction of seeing my large lecture-room constantly full. The first of these courses was on the ``Development of Civilization during the Middle Ages''; and, as I followed the logical rather than the chronological order,--taking up the subject, not by a recital of events, but by a discussion of epochs and subjects,--I thought it best to lecture without manuscript or even notes. This was, for me, a bold venture. I had never before attempted anything in the way of extended extemporaneous speaking; and, as I entered the old chapel of the university for my first lecture, and saw it full of students of all classes, I avowed my trepidation to President Tappan, who, having come to introduce me, was seated by my side. He was an admirable extemporaneous speaker in the best sense, and he then and there gave me a bit of advice which proved of real value. He said: ``Let me, as an old hand, tell you one thing: never stop dead; keep saying something.'' This course of lectures was followed by others on modern history, one of these being on ``German History from the Revival of Learning and the Reformation to Modern Times,'' another on ``French History from the Consolidation of the Monarchy to the French Revolution,'' and still another on the ``French Revolution.'' To this latter course I gave special attention, the foundation having been laid for it in France, where I had visited various interesting places and talked with interesting men who recalled events and people of the Revolutionary and Napoleonic periods. For a text-book foundation I read with my lower classes Mignet's ``History of the Revolution,'' which still remained what Carlyle pronounced it--the best short summary of that great period. To further the work of my students in the lecture-room, I published an interleaved syllabus of each course, and was, I think, the first person in our country who ever did this in connection with historical lectures. It is a matter of wonder to me that so few professors in these days resort to this simple means of strengthening their instruction. It ought to be required by university statutes. It seems to me indispensable to anything like thorough work. A syllabus, properly interleaved, furnishes to a student by far the best means of taking notes on each lecture, as well as of reviewing the whole course afterward, and to a professor the best means of testing the faithfulness of his students. As regards myself personally, there came to me from my syllabus an especial advantage; for, as I have shown in my political experiences, it gained for me the friendship of Charles Sumner.