The apprehension of a living object in thought, so as to seize and fix it in its mobile vitality and its fluctuating and fleeting states, is an act of the imagination, which, however, is naturally of a peculiar kind, and entirely distinct from artistic or poetical fancy. It is, in this respect, worthy of remark, that all the most characteristic and felicitous terms which are employed to designate the great discoveries in modern times of the profounder secrets of nature are, for the greater part, boldly figurative, and often even symbolical. Here, therefore, also, we have a manifestation of that affinity which subsists between nature and the faculty of fancy, by which alone its ever-stirring vitality is scientifically apprehended. I formerly observed that, in the outer senses, as faculties of the soul subordinate to the fancy, a higher intellectual endowment, as a special gift of nature, is occasionally found to exist, namely, the sense of art, or the eye for beautiful forms, and the ear for musical sounds. But even the lower sense, the more purely organic feeling, is often evolved to higher degrees of susceptibility, which, however, do not fall within the sphere of the feeling for art, but form, as it were, a peculiar and special sense of nature. To this class belong those indescribable feelings of sympathy and inward attraction--the many vivid presentiments of a strange foreboding--traces of which may be observed among many other animals besides man, just as, in the case of musical tones and emotions, a light note of remote affinity seems to bring the soul of man in unison with a correspondent nature soul in the higher members of the brute creation. Numberless are the instances of such forebodings (among which we must reckon also the significant vision or dream) recorded of all times, countries, and spheres of life. No doubt, from their strange nature, and from the manifold difficulties with which man’s mode of observing and narrating these phenomena perplexes the consideration of them, it is any thing but easy, in any individual case, to arrive at a pure result, and to pass a final and decisive sentence. Still, on the whole, the fact can not well be denied, as, indeed, it is not even attempted, by any unprejudiced and profound observer of nature in the present day. But now, if such an immediate feeling of invisible light and life does freely develop and clearly manifest itself as an indubitable faculty and a perfectly distinct state of the consciousness, then assuredly we have herein a new organ of perception and a new natural sense. Though not, indeed, more infallible than any other of the senses, it may, nevertheless, be the source of very remarkable phenomena, which, perhaps, above all others require investigation, in order that their distinctive character may be precisely and accurately determined. It is, however, necessary to remember that the latter is not to be determined by any side-blow of caprice, any more than the electric