First permit me to remove a very natural, indeed almost inevitable, mistake, relative to my lectures; namely, that I _have_ them, or that the lectures of one place or season are in any way repeated in another. So far from it, that on any point that I had ever studied (and on no other should I dare discourse--I mean, that I would not lecture on any subject for which I had to _acquire_ the main knowledge, even though a month's or three month's previous time were allowed me; on no subject that had not employed my thoughts for a large portion of my life since earliest manhood, free of all outward and particular purpose)--on any point within my habit of thought, I should greatly prefer a subject I had never lectured on, to one which I had repeatedly given; and those who have attended me for any two seasons successively will bear witness, that the lecture given at the London Philosophical Society, on the _Romeo and Juliet_, for instance, was as different from that given at the Crown and Anchor, as if they had been by two individuals who, without any communication with each other, had only mastered the same principles of philosophical criticism. This was most strikingly evidenced in the coincidence between my lectures and those of Schlegel; such, and so close, that it was fortunate for my moral reputation that I had not only from five to seven hundred ear witnesses that the passages had been given by me at the Royal Institution two years before Schlegel commenced his lectures at Vienna, but that notes had been taken of these by several men and ladies of high rank. The fact is this; during a course of lectures, I faithfully employ all the intervening days in collecting and digesting the materials, whether I have or have not lectured on the same subject before, making no difference. The day of the lecture, till the hour of commencement, I devote to the consideration, what of the mass before me is best fitted to answer the purposes of a lecture, that is, to keep the audience awake and interested during the delivery, and to leave a sting behind, that is, a disposition to study the subject anew, under the light of a new principle. Several times, however, partly from apprehension respecting my health and animal spirits, partly from the wish to possess copies that might afterwards be marketable among the publishers, I have previously written the lecture; but before I had proceeded twenty minutes, I have been obliged to push the MS. away, and give the subject a new turn. Nay, this was so notorious, that many of my auditors used to threaten me, when they saw any number of written papers on my desk, to steal them away; declaring they never felt so secure of a good lecture as when they perceived that I had not a single scrap of writing before me. I take far, far more pains than would go to the set composition of a lecture, both by varied reading and by meditation; but for the words, illustrations, &c., I know almost as little as any of the audience (that