_Cæsars_ is the best example, was, though sometimes coloured by his fancy, and at other times distorted by a slight tendency to _supercherie_ as in _The Tartars_ and _The Spanish Nun_, wonderfully powerful and acute. He was not exactly as Southey was, "omnilegent"; but in his own departments, and they were numerous, he went farther below the surface and connected his readings together better than Southey did. Of the two classes of severer study to which he specially addicted himself, his political economy suffered perhaps a little, acute as his views in it often are, from the fact that in his time it was practically a new study, and that he had neither sufficient facts nor sufficient literature to go upon. In metaphysics, to which he gave himself up for years, and in which he seems really to have known whatever there was to know, I fear that the opium fiend cheated the world of something like masterpieces. Only three men during De Quincey's lifetime had anything like his powers in this department. Of these three men, Sir William Hamilton either could not or would not write English. Ferrier could and did write English; but he could not, as De Quincey could, throw upon philosophy the play of literary and miscellaneous illustration which of all the sciences it most requires, and which all its really supreme exponents have been able to give it. Mansel could do both these things; but he was somewhat indolent, and had many avocations. De Quincey could write perfect English, he had every resource of illustration and relief at command, he was in his way as "brazen-bowelled" at work as he was "golden-mouthed" at expression, and he had ample leisure. But the inability to undertake sustained labour, which he himself recognises as the one unquestionable curse of opium, deprived us of an English philosopher who would have stood as far above Kant in exoteric graces, as he would have stood above Bacon in esoteric value. It was not entirely De Quincey's fault. It seems to be generally recognised now that whatever occasional excesses he may have committed, opium was really required in his case, and gave us what we have as much as it took away what we have not. But if any one chose to write in the antique style a debate between Philosophy, Tar-water, and Laudanum, it would be almost enough to put in the mouth of Philosophy, "This gave me Berkeley and that deprived me of De Quincey."