widely disseminated; and it was _well contrived_ and _inexpressibly humane_ to introduce and firmly to oppose such a _desperate_ character, even in a work upon a _different subject_. In short, these gentlemen had the nearest interest in opposing him.... Well, it must certainly be highly satisfactory to have thus opposed the progress of error and rescued the human race from _disgrace_ and _misery_. Generous, disinterested, philanthropic defenders of _humanity_, you have your reward _in your own breasts_. But their apology will not bear the test of ridicule. Let us therefore examine, in another way, the foundation upon which it rests. After denying the truth of the principle they ascribe it to another. And who is ignorant that this has been the fate of every original proposition? M. Richerand, they say, discovered it in 1805. Now granting, for a moment, the truth of this, I preceded him by a year or two at least, and James Macartney, Esq. lecturer on comparative anatomy, even constructed, twelve months before the time they mention, a work upon the principle, for which he was favoured with drawings by Charles Bell, Esq. at the time the discovery is ascribed to M. Richerand. I mention these facts because, even granting the truth of what these gentlemen state, it refutes the assertions they found upon it.—I shall make a point of laying the further details on this subject (to me very important) before the medical world, which will show that, _even since I first enunciated the principle_, neither M. Richerand, nor any other person, has even repeated the proposition, and I defy these gentlemen to produce an instance of it. This, however, I must remark, even these gentlemen most inconsistently grant; for they say that the proposal, which they assert was made by M. Richerand, has been tried and has _failed_; whereas the proposition enunciated by me has been tried, has _uniformly succeeded_, and, such is its correctness, that it constitutes the basis of that part of my course which involves the operations of surgery. Therefore, even according to themselves, _the propositions cannot be the same_. I may now conclude by observing, that, notwithstanding the conduct of these gentlemen, I am far from bearing them any personal dislike,—but shall, on the contrary, be happy to labour with them in the same vineyard, and wish them the utmost success. * * * * * Mr WALKER’S Course of ANATOMY and PHYSIOLOGY recommences on _Tuesday the 8th of November, at_ ELEVEN O’CLOCK, a. m. and his Course of PATHOLOGY and the PRACTICE OF MEDICINE, at TWO O’CLOCK, p. m. and will be continued daily at these hours, at No. 63, SOUTH BRIDGE-STREET.