so much find a difficulty in apprehending demonstrations, as a want of interest, and a consequent inability to retain them in his memory. A little more practice in the strict logic of geometry, a little more familiarity with the physical laws of the universe, and the phenomena to which they relate, would possibly have repressed the tendency to vague and mystical speculations which he was too fond of indulging. In the philosophy of the human mind, he was in no danger of the materializing theories of some ancient and modern schools; but in shunning this extreme, he might sometimes forget that, in the honest pursuit of truth, we can shut our eyes to no real phenomena, and that the physiology of man must always enter into any valid scheme of his psychology. The comparative inferiority which he might show in the usual trials of knowledge, sprung in a great measure from the want of a prompt and accurate memory. It was the faculty wherein he shone the least, according to ordinary observation; though his very extensive reach of literature, and his rapidity in acquiring languages, sufficed to prove that it was capable of being largely exercised. He could remember anything, as a friend observed to the Editor, that was associated with an idea. But he seemed, at least after he reached manhood, to want almost wholly the power, so common with inferior understandings, of retaining, with regularity and exactness, a number of unimportant uninteresting particulars. It would have been nearly impossible to make him recollect for three days the date of the battle of Marathon, or the names in order of the Athenian months. Nor could he repeat poetry, much as he loved it, with the correctness often found in young men. It is not improbable, that a more steady discipline in early life would have strengthened this faculty, or that he might have supplied its deficiency by some technical devices; but where the higher powers of intellect were so extraordinarily manifested, it would have been preposterous to complain of what may perhaps have been a necessary consequence of their amplitude, or at least a natural result of their exercise.