But, if this sounds in the ear of some a doubtful refinement, the doubt applies only to the lowest degrees of space. For the highest, it is certain that brutes have no perception. To man is as much reserved the prerogative of perceiving space in its higher extensions, as of geometrically constructing the relations of space. And the brute is no more capable of apprehending abysses through his eye, than he can build upwards or can analyze downwards the ærial synthesis of Geometry. Such, therefore, as is space for the grandeur of man's perceptions, such as is space for the benefit of man's towering mathematic speculations, such is the nature of our debt to Lord Rosse--as being the philosopher who has most pushed back the frontiers of our conquests upon this _exclusive_ inheritance of man. We have all heard of a king that, sitting on the sea-shore, bade the waves, as they began to lave his feet, upon their allegiance to retire. _That_ was said not vainly or presumptuously, but in reproof of sycophantic courtiers. Now, however, we see in good earnest another man, wielding another kind of sceptre, and sitting upon the shores of infinity, that says to the ice which had frozen up our progress,--'Melt thou before my breath!' that says to the rebellious _nebulæ_,--'Submit, and burst into blazing worlds!' that says to the gates of darkness,--'Roll back, ye barriers, and no longer hide from us the infinities of God!' 'Come, and I will show you what is beautiful.' From the days of infancy still lingers in my ears this opening of a prose hymn by a lady, then very celebrated, viz., the late Mrs. Barbauld. The hymn began by enticing some solitary infant into some silent garden, I believe, or some forest lawn; and the opening words were, 'Come, and I will show you what is beautiful!' Well, and what beside? There is nothing beside; oh, disappointed and therefore enraged reader; positively this is the sum-total of what I can recall from the wreck of years; and certainly it is not much. Even of Sappho, though time has made mere ducks and drakes of her lyrics, we have rather more spared to us than this. And yet this trifle, simple as you think it, this shred of a fragment, if the reader will believe me, still echoes with luxurious sweetness in my ears, from some unaccountable hide-and-seek of fugitive childish memories; just as a marine shell, if applied steadily to the ear, awakens (according to the fine image of Landor [Footnote: 'Of Landor,' viz., in his 'Gebir;' but also of Wordsworth in 'The Excursion.' And I must tell the reader, that a contest raged at one time as to the _original property_ in this image, not much less keen than that between Neptune and Minerva, for the chancellorship of Athens.]) the great vision of the sea; places the listener 'In the sun's palace-porch, And murmurs as the ocean murmurs there.'