Saturday morning.--I must dispatch my letter by to-day’s mail, and as I am going to Boston, where I have not been for a week, I will drop it in the post office there, to insure its transmission by this afternoon’s mail. Yesterday afternoon I met the first two sections of my class of Freshmen for recitation. It went off very well. I am pretty good at asking questions. The lads were well prepared. Next Tuesday I meet the third and fourth sections; and on Thursday, the ides of March, I give my first lecture on Botany. If I succeed well, I am sure no one will be more pleased and gratified than yourself, and that of itself is enough to incite me to effort. If I don’t altogether succeed, neither satisfying myself nor others, I shall not be discouraged, but try again, as I am determined to succeed in the long run. Nil desperandum. I shall have the president to hear me; but he is said always to fall asleep on such occasions, and to be very commendatory when he awakes. I now board with the sister of my landlord, Deacon Munroe, a table of only five, one professor, one tutor, and two advanced law students. We yesterday commenced the experiment of dining at five o’clock, much to my gratification, and if the other gentlemen like it as well as I do, we shall continue to dine at that hour, until summer at least. It is very cold here; though the sun shines brightly all day, it scarcely thaws at midday. CAMBRIDGE, March 18, 1843. Your most welcome and long-expected letter of the 14th reached me only this noon. This first day of leisure of this week has been a very busy one. I have been to town, and just got back. I have had to work very hard this week. I have got my course of recitations for the Freshmen on Smellie well in progress, and am quite interested in it, though at first I thought it would have been a great bore. The class are generally very much interested, and give promise that I shall reap the fruits of my labor when they become Sophomores or Seniors and attend the botanical lectures, for which I think I am laying a foundation. I am now perfectly at ease in my mode of teaching them; I am pretty good at questioning, and I give them plenty of illustration, explanation, and ideas not in the book, which pleases and interests them. In one of the divisions last week, while giving them a sort of lecture, two hours long! (to which they listened well; for I gave them, or those who chose, the opportunity of going at the expiration of the regular hour, but not one of them budged), turning my head at a fortunate moment, I caught one of the fellows (rather a stupid fellow, a boarder with me last term) throwing his cap to his companion or playing some trick. You know I can scold. So I gave him about half a dozen words that made him open his eyes wide; and I do not think that he, nor any of that division, will venture upon anything of the kind again very soon.