Thus, in all other parts of the body, as well as these, wherever, for the sake of the necessary motion of the parts, with proper strength and agility, the insertions of the muscles are too hard and sudden, their swellings too bold, or the hollows between them too deep, for their out-lines to be beautiful; nature most judiciously softens these hardnesses, and plumps up these vacancies with a proper supply of fat, and covers the whole with the soft, smooth, springy, and, in delicate life, almost transparent skin, which, conforming itself to the external shape of all the parts beneath, expresses to the eye the idea of its contents with the utmost delicacy of beauty and grace.
The skin, therefore, thus tenderly embracing, and gently conforming itself to the varied shapes of every one of the outward muscles of the body, soften'd underneath by the fat, where, otherwise, the same hard lines and furrows would appear, as we find come on with age in the face, and with labour, in the limbs, is evidently a shell-like surface (to keep up the idea I set out with) form'd with the utmost delicacy in nature; and therefore the most proper subject of the study of every one, who desires to imitate the works of nature, as a master should do, or to judge of the performances of others as a real connoisseur ought.
I cannot be too long, I think, on this subject, as so much will be found to depend upon it; and therefore shall endeavour to give a clear idea of the different effect such anatomical figures have on the eye, from what the same parts have, when cover'd by the fat and skin; by supposing a small wire (that has lost its spring and so will retain every shape it is twisted into) to be held fast to the out-side of the hip (fig. 65. plate I) and thence brought down the other side of the thigh obliquely over the calf of the leg, down to the outward ancle (all the while press'd so close as to touch and conform itself to the shape of every muscle it passes over) and then to be taken off. If this wire be now examined it will be found that the general uninterrupted flowing twist, which the winding round the limbs would otherwise have given to it, is broken into little better than so many separate plain curves, by the sharp indentures it every where has receiv'd on being closely press'd in between the muscles.
Suppose, in the next place, such a wire was in the same manner twisted round a living well-shaped leg and thigh, or those of a fine statue; when you take it off you will find no such sharp indentures, nor any of those regular engralings (as the heralds express it) which displeased the eye before. On the contrary, you will see how gradually the changes in its shape are produced; how imperceptibly the different curvatures run into each other, and how easily the eye glides along the varied wavings of its sweep. To enforce this still further, if a line were to be drawn by a pencil exactly where these wires have been supposed to pass, the point of the pencil, in the muscular leg and thigh, would perpetually meet with stops and rubs, whilst in the others it would flow from muscle to muscle along the elastic skin, as pleasantly as the lightest skiff dances over the gentlest wave.
This idea of the wire, retaining thus the shape of the parts it passes over, seems of so much consequence, that I would by no means have it forgot; as it may properly be consider'd as one of the threads (or outlines) of the shell (or external surface) of the human form: and the frequently recurring to it will assist the imagination in its conceptions of those parts of it, whose shapes are most intricately varied: for the same sort of observations may be made, with equal justice, on the shapes of ever so many such wires twisted in the same manner in ever so many directions over every part of a well made man, woman, or statue.
And if the reader will follow in his imagination the most exquisite turns of the chisel in the hands of a master, when he is putting the finishing touches to a statue; he will soon be led to understand what it is the real judges expect from the hand of such a master, which the Italians call, the little more, Il poco piu, and which in reality distinguishes the original master-pieces at Rome from even the best copies of them.
An example or two will sufficiently explain what is here meant; for as these exquisite turns are to be found, in some degree of beauty or other, all over the whole surface of the body and limbs: we may by taking any one part of a fine figure (though so small a one that only a few muscles are express'd in it) explain the manner in which so much beauty and grace has been given to them, as to convince a skilful artist, almost at sight, that it must have been the work of a master.
I have chosen, for this purpose, a small piece of the body of a statue, fig. [76 T p. II], representing part of the left side under the arm, together with a little of the breast, (including a very particular muscle, which, from the likeness its edges bear to the teeth of a saw, is, if consider'd by itself, void of beauty) as most proper to the point in hand, because this its regular shape more peculiarly requires the skill of the artist to give it a little more variety than it generally has, even in nature.