Sec. 6. Thus, when the eye is quite uncultivated, it sees that a man is a man, and a face is a face, but has no idea what shadows or lights fall upon the form or features. Cultivate it to some degree of artistic power, and it will then see shadows distinctly, but only the more vigorous of them. Cultivate it still farther, and it will see light within light, and shadow within shadow, and will continually refuse to rest in what it had already discovered, that it may pursue what is more removed and more subtle, until at last it comes to give its chief attention and display its chief power on gradations which to an untrained faculty are partly matters of indifference, and partly imperceptible. That these subtle gradations have indeed become matters of primal importance to it, may be ascertained by observing that they are the things it will last part with, as the object retires into distance; and that, though this distance may become so great as to render the real nature of the object quite undiscernible, the gradations of light upon it will not be lost. Sec. 7. For instance, Fig. 1, on the opposite page, Plate 26, is a tolerably faithful rendering of the look of a wall tower of a Swiss town as it would be seen within some hundred yards of it. Fig. 2 is (as nearly as I can render it) a facsimile of Turner's actual drawing of this tower, at a presumed distance of about half a mile. It has far less of intelligible delineation, either of windows, cornices, or tiles; but intense care has still been given to get the pearly roundness of the side, and the exact relations of all the tones of shade. And now, if Turner wants to remove the tower still farther back, he will gradually let the windows and stones all disappear together, before he will quit his shadows and delicately centralized rays. At Fig. 3 the tower is nearly gone, but the pearly roundness of it and principal lights of it are there still. At Fig. 4 (Turner's ultimate condition in distance) the essence of the thing is quite unintelligible; we cannot answer for its being a tower at all. But the gradations of light are still there, and as much pains have been taken to get them as in any of the other instances. A vulgar artist would have kept something of the form of the tower, expressing it by a few touches; and people would call it a clever drawing. Turner lets the tower melt into air, but still he works half an hour or so over those delicate last gradations, which perhaps not many people in England besides himself can fully see, as not many people can understand the final work of a great mathematician. I assume, of course, in this example, that the tower, as it grows less and less distinct, becomes part of the subject of a _larger_ picture. Fig. 1 represents nearly what Turner's treatment of it would be if it were the principal subject of a vignette; and Fig. 4 his treatment of it as an object in the extreme distance of a large oil picture. If at the same supposed