Before Margrave's melancholy state much of my former fear and abhorrence faded away. This being, so exceptional that fancy might well invest him with preternatural attributes, was now reduced by human suffering to human sympathy and comprehension; yet his utter want of conscience was still as apparent as in his day of joyous animal spirits. With what hideous candour he had related his perfidy and ingratitude to the man to whom, in his belief, he owed an inestimable obligation, and with what insensibility to the signal retribution which in most natures would have awakened remorse! And by what dark hints and confessions did he seem to confirm the incredible memoir of Sir Philip Derval! He owned that he had borne from the corpse of Haroun the medicament to which he ascribed his recovery from a state yet more hopeless than that under which he now laboured! He had alluded, rapidly, obscurely, to some knowledge at his command "surer than man's." And now, even now the mere wreck of his former existence--by what strange charm did he still control and confuse my reason? And how was it that I felt myself murmuring, again and again, "But what, after all, if his hope be no chimera, and if Nature do hide a secret by which I could save the life of my beloved Lilian?" And again and again, as that thought would force itself on me, I rose and crept to Lilian's threshold, listening to catch the faintest sound of her breathing. All still, all dark! In that sufferer recognized science detects no mortal disease, yet dares not bid me rely on its amplest resources of skill to turn aside from her slumber the stealthy advance of death; while in yon log-hut one whose malady recognized science could not doubt to be mortal has composed himself to sleep, confident of life! Recognized science?--recognized ignorance! The science of to-day is the ignorance of to-morrow! Every year some bold guess lights up a truth to which, but the year before, the schoolmen of science were as blinded as moles. "What, then," my lips kept repeating,--"what if Nature do hide a secret by which the life of my life can be saved? What do we know of the secrets of Nature? What said Newton himself of his knowledge? 'I am like a child picking up pebbles and shells on the sand, while the great ocean of Truth lies all undiscovered around me!' And did Newton himself, in the ripest growth of his matchless intellect, hold the creed of the alchemists in scorn? Had he not given to one object of their research, in the transmutation of metals, his days and his nights? Is there proof that he ever convinced himself that the research was the dream, which we, who are not Newtons, call it?[1] And that other great sage, inferior only to Newton--the calculating doubt-weigher, Descartes--had he not believed in the yet nobler hope of the alchemists,--believed in some occult nostrum or process by which human life could attain to the age of the Patriarchs?"[2]