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 is necessary in any case to an author's purposes.

2. As furnishing a key to some parts of that tremendous scenery which afterwards peopled the dreams of the opium-eater.

3. As creating some previous interest of a personal sort in the confessing subject, apart from the matter of the confessions, which cannot fail to render the confessions themselves more interesting. If a man "whose talk is of oxen" should become an opium-eater, the probability is that (if he is not too dull to dream at all)—he will dream about oxen; whereas, in the case before him, the reader will find that the opium-eater boasteth himself to be a philosopher; and accordingly, that the phantasmagoria of his dreams (waking or sleeping, day-dreams or night-dreams) is suitable to one who in that character,

Humani nihil à se alienum putat.

For amongst the conditions which he deems indispensable to the sustaining of any claim to the title of philosopher, is not merely the possession of a superb intellect