Dendy, in his “Philosophy of Mystery,” mentions “M. Andral, who in his youth saw, in La Pitie, the putrid body of a child covered with larvæ, and during the next morning the spectre of this corpse lying on his table was as perfect as reality.” He could not see it by a mental effort, nor any where else than on his table, and whenever he looked at that, the appearance at once came. It may be said in explanation, that the sight of the disgusting object produced a strong impression on the optic nerves and mind, and a suggestive object, as the table reproduced the same state. We have no evidence that one object, under the same light, affects the optic nerves more than any other would under the same circumstances. Vivid mental impressions are more readily reproduced than those that scarcely ruffle the surface of thought; but this does not account for the student not seeing the appearance at any other time or place than on the table where it had laid, and which we would say retained the influence imparted to it by the body having lain there. Professor Hitchcock says that during a severe sickness, “day after day visions of strange landscapes spread out before him--mountain, lake and forest; vast rocks, strata upon strata piled to the clouds; the panorama of a world shattered and upheaved, disclosing the grim secrets of creation, the unshapely and monstrous rudiments of organic being.” His son, Professor Charles Hitchcock, adds that his father saw the sandstone beds of the Connecticut valley spread out before him, covered with tracks, and by the superior insight wrought by sickness, cleared up some doubtful points to which he had vainly given his attention. Professor Hitchcock became, in consequence of his sickness, exceedingly sensitive, and the geological specimens near him, or that he had handled, brought up in his mind the pictures of their primeval age.