APPENDIX. THE proprietors of this little work having determined on reprinting it, some explanation seems called for, to account for the non-appearance of a Third Part, promised in the London Magazine of December last; and the more so, because the proprietors, under whose guarantee that promise was issued, might otherwise be implicated in the blame little or much attached to its non-fulfilment. This blame, in mere justice, the author takes wholly upon himself. What may be the exact amount of the guilt which he thus appropriates, is a very dark question to his own judgment, and not much illuminated by any of the masters on casuistry whom he has consulted on the occasion. On the one hand, it seems generally agreed that a promise is binding in the inverse ratio of the numbers to whom it is made: for which reason it is that we see many persons break promises without scruple that are made to a whole nation, who keep their faith religiously in all private engagements, -- breaches of promise towards the stronger party being committed at a man's own peril : on the other hand, the only parties interested in the promises of an author are his readers, and these it is a point of modesty in any author to believe as few as possible; or perhaps only one, in which case any promise imposes a sanctity of moral obligation which it is shocking to think of. Casuistry dismissed, however, — the author throws himself on the indulgent consideration of all who may conceive themselves aggrieved by his delay, in the following account of his own condition from the end of last year, when the engagement was made, up nearly to the present time. For any purpose of selfexcuse, it might be sufficient to say, that intolerable bodily suffering had totally disabled him for almost any exertion of mind, more especially for such as demand and presuppose a pleasurable and a genial state of feeling; but, as a case that may by possibility contribute a ́ trifle to the medical history of opium in a further stage of its action than can often have been brought under the notice of professional men, he has judged that it might be acceptable to some readers to have it described more at length. Fiat experimentum in corpore vili is a just rule where there is any reasonable presumption of benefit to arise on a large scale. What the benefit may be, will admit of a doubt; but there can be none as to the value of the body, for a more worthless body than his own, the author is free to confess, cannot be. It is his pride to believe, that it is the very ideal of a base, crazy, despicable human system, that hardly ever could have been meant to be seaworthy for two days under the ordinary storms and wear-and-tear of life! and, indeed, if that were the creditable way of disposing of human bodies, he must own that he should almost be ashamed to bequeath his wretched structure to any respectable dog. But now to the case, which, for the |