§ XXXI. Law II. Science of inner structure is to be abandoned. As the body of the structure is confessedly of inferior, and comparatively incoherent materials, it would be absurd to attempt in it any expression of the higher refinements of construction. It will be enough that by its mass we are assured of its sufficiency and strength; and there is the less reason for endeavoring to diminish the extent of its surface by delicacy of adjustment, because on the breadth of that surface we are to depend for the better display of the color, which is to be the chief source of our pleasure in the building. The main body of the work, therefore, will be composed of solid walls and massive piers; and whatever expression of finer structural science we may require, will be thrown either into subordinate portions of it, or entirely directed to the support of the external mail, where in arches or vaults it might otherwise appear dangerously independent of the material within.

§ XXXII. Law III. All shafts are to be solid. Wherever, by the smallness of the parts, we may be driven to abandon the incrusted structure at all, it must be abandoned altogether. The eye must never be left in the least doubt as to what is solid and what is coated. Whatever appears probably solid, must be assuredly so, and therefore it becomes an inviolable law that no shaft shall ever be incrusted. Not only does the whole virtue of a shaft depend on its consolidation, but the labor of cutting and adjusting an incrusted coat to it would be greater than the saving of material is worth. Therefore the shaft, of whatever size, is always to be solid; and because the incrusted character of the rest of the building renders it more difficult for the shafts to clear themselves from suspicion, they must not, in this incrusted style, be in any place jointed. No shaft must ever be used but of one block; and this the more, because the permission given to the builder to have his walls and piers as ponderous as he likes, renders it quite unnecessary for him to use shafts of any fixed size. In our Norman and Gothic, where definite support is required at a definite point, it becomes lawful to build up a tower of small stones in the shape of a shaft. But the Byzantine is allowed to have as much support as he wants from the walls in every direction, and he has no right to ask for further license in the structure of his shafts. Let him, by generosity in the substance of his pillars, repay us for the permission we have given him to be superficial in his walls. The builder in the chalk valleys of France and England may be blameless in kneading his clumsy pier out of broken flint and calcined lime; but the Venetian, who has access to the riches of Asia and the quarries of Egypt, must frame at least his shafts out of flawless stone.

§ XXXIII. And this for another reason yet. Although, as we have said, it is impossible to cover the walls of a large building with color, except on the condition of dividing the stone into plates, there is always a certain appearance of meanness and niggardliness in the procedure. It is necessary that the builder should justify himself from this suspicion; and prove that it is not in mere economy or poverty, but in the real impossibility of doing otherwise, that he has sheeted his walls so thinly with the precious film. Now the shaft is exactly the portion of the edifice in which it is fittest to recover his honor in this respect. For if blocks of jasper or porphyry be inserted in the walls, the spectator cannot tell their thickness, and cannot judge of the costliness of the sacrifice. But the shaft he can measure with his eye in an instant, and estimate the quantity of treasure both in the mass of its existing substance, and in that which has been hewn away to bring it into its perfect and symmetrical form. And thus the shafts of all buildings of this kind are justly regarded as an expression of their wealth, and a form of treasure, just as much as the jewels or gold in the sacred vessels; they are, in fact, nothing else than large jewels,³¹ the block of precious serpentine or jasper being valued according to its size and brilliancy of color, like a large emerald or ruby; only the bulk required to bestow value on the one is to be measured in feet and tons, and on the other in lines and carats. The shafts must therefore be, without exception, of one block in all buildings of this kind; for the attempt in any place to incrust or joint them would be a deception like that of introducing a false stone among jewellery (for a number of joints of any precious stone are of course not equal in value to a single piece of equal weight), and would put an end at once to the spectator’s confidence in the expression of wealth in any portion of the structure, or of the spirit of sacrifice in those who raised it.

§ XXXIV. Law IV. The shafts may sometimes be independent of the construction. Exactly in proportion to the importance which the shaft assumes as a large jewel, is the diminution of its importance as a sustaining member; for the delight which we receive in its abstract bulk, and beauty of color, is altogether independent of any perception of its adaptation to mechanical necessities. Like other beautiful things in this world, its end is to be beautiful; and, in proportion to its beauty, it receives permission to be otherwise useless. We do not blame emeralds and rubies because we cannot make them into heads of hammers. Nay, so far from our admiration of the jewel shaft being dependent on its doing work for us, it is very possible that a chief part of its preciousness may consist in a delicacy, fragility, and tenderness of material, which must render it utterly unfit for hard work; and therefore that we shall admire it the more, because we perceive that if we were to put much weight upon it, it would be crushed. But, at all events, it is very clear that the primal object in the placing of such shafts must be the display of their beauty to the best advantage, and that therefore all imbedding of them in walls, or crowding of them into groups, in any position in which either their real size or any portion of their surface would be concealed, is either inadmissible altogether, or objectionable in proportion to their value; that no symmetrical or scientific arrangements of pillars are therefore ever to be expected in buildings of this kind, and that all such are even to be looked upon as positive errors and misapplications of materials: but that, on the contrary, we must be constantly prepared to see, and to see with admiration, shafts of great size and importance set in places where their real service is little more than nominal, and where the chief end of their existence is to catch the sunshine upon their polished sides, and lead the eye into delighted wandering among the mazes of their azure veins.

§ XXXV. Law V. The shafts may be of variable size. Since the value of each shaft depends upon its bulk, and diminishes with the diminution of its mass, in a greater ratio than the size itself diminishes, as in the case of all other jewellery, it is evident that we must not in general expect perfect symmetry and equality among the series of shafts, any more than definiteness of application; but that, on the contrary, an accurately observed symmetry ought to give us a kind of pain, as proving that considerable and useless loss has been sustained by some of the shafts, in being cut down to match with the rest. It is true that symmetry is generally sought for in works of smaller jewellery; but, even there, not a perfect symmetry, and obtained under circumstances quite different from those which affect the placing of shafts in architecture. First: the symmetry is usually imperfect. The stones that seem to match each other in a ring or necklace, appear to do so only because they are so small that their differences are not easily measured by the eye; but there is almost always such difference between them as would be strikingly apparent if it existed in the same proportion between two shafts nine or ten feet in height. Secondly: the quantity of stones which pass through a jeweller’s hands, and the facility of exchange of such small objects, enable the tradesman to select any number of stones of approximate size; a selection, however, often requiring so much time, that perfect symmetry in a group of very fine stones adds enormously to their value. But the architect has neither the time nor the facilities of exchange. He cannot lay aside one column in a corner of his church till, in the course of traffic, he obtain another that will match it; he has not hundreds of shafts fastened up in bundles, out of which he can match sizes at his ease; he cannot send to a brother-tradesman and exchange the useless stones for available ones, to the convenience of both. His blocks of stone, or his ready hewn shafts, have been brought to him in limited number, from immense distances; no others are to be had; and for those which he does not bring into use, there is no demand elsewhere. His only means of obtaining symmetry will therefore be, in cutting down the finer masses to equality with the inferior ones; and this we ought not to desire him often to do. And therefore, while sometimes in a Baldacchino, or an important chapel or shrine, this costly symmetry may be necessary, and admirable in proportion to its probable cost, in the general fabric we must expect to see shafts introduced of size and proportion continually varying, and such symmetry as may be obtained among them never altogether perfect, and dependent for its charm frequently on strange complexities and unexpected rising and falling of weight and accent in its marble syllables; bearing the same relation to a rigidly chiselled and proportioned architecture that the wild lyric rhythm of Æschylus or Pindar bears to the finished measures of Pope.

§ XXXVI. The application of the principles of jewellery to the smaller as well as the larger blocks, will suggest to us another reason for the method of incrustation adopted in the walls. It often happens that the beauty of the veining in some varieties of alabaster is so great, that it becomes desirable to exhibit it by dividing the stone, not merely to economize its substance, but to display the changes in the disposition of its fantastic lines. By reversing one of two thin plates successively taken from the stone, and placing their corresponding edges in contact, a perfectly symmetrical figure may be obtained, which will enable the eye to comprehend more thoroughly the position of the veins. And this is actually the method in which, for the most part, the alabasters of St. Mark are employed; thus accomplishing a double good,—directing the spectator, in the first place, to close observation of the nature of the stone employed, and in the second, giving him a farther proof of the honesty of intention in the builder: for wherever similar veining is discovered in two pieces, the fact is declared that they have been cut from the same stone. It would have been easy to disguise the similarity by using them in different parts of the building; but on the contrary they are set edge to edge, so that the whole system of the architecture may be discovered at a glance by any one acquainted with the nature of the stones employed. Nay, but, it is perhaps answered me, not by an ordinary observer; a person ignorant of the nature of alabaster might perhaps fancy all these symmetrical patterns to have been found in the stone itself, and thus be doubly deceived, supposing blocks to be solid and symmetrical which were in reality subdivided and irregular. I grant it; but be it remembered, that in all things, ignorance is liable to be deceived, and has no right to accuse anything but itself as the source of the deception. The style and the words are dishonest, not which are liable to be misunderstood if subjected to no inquiry, but which are deliberately calculated to lead inquiry astray. There are perhaps no great or noble truths, from those of religion downwards, which present no mistakeable aspect to casual or ignorant contemplation. Both the truth and the lie agree in hiding themselves at first, but the lie continues to hide itself with effort, as we approach to examine it; and leads us, if undiscovered, into deeper lies; the truth reveals itself in proportion to our patience and knowledge, discovers itself kindly to our pleading, and leads us, as it is discovered, into deeper truths.

§ XXXVII. Law VI. The decoration must be shallow in cutting. The method of construction being thus systematized, it is evident that a certain style of decoration must arise out of it, based on the primal condition that over the greater part of the edifice there can be no deep cutting. The thin sheets of covering stones do not admit of it; we must not cut them through to the bricks; and whatever ornaments we engrave upon them cannot, therefore, be more than an inch deep at the utmost. Consider for an instant the enormous differences which this single condition compels between the sculptural decoration of the incrusted style, and that of the solid stones of the North, which may be hacked and hewn into whatever cavernous hollows and black recesses we choose; struck into grim darknesses and grotesque projections, and rugged ploughings up of sinuous furrows, in which any form or thought may be wrought out on any scale,—mighty statues with robes of rock and crowned foreheads burning in the sun, or venomous goblins and stealthy dragons shrunk into lurking-places of untraceable shade: think of this, and of the play and freedom given to the sculptor’s hand and temper, to smite out and in, hither and thither, as he will; and then consider what must be the different spirit of the design which is to be wrought on the smooth surface of a film of marble, where every line and shadow must be drawn with the most tender pencilling and cautious reserve of resource,—where even the chisel must not strike hard, lest it break through the delicate stone, nor the mind be permitted in any impetuosity of conception inconsistent with the fine discipline of the hand. Consider that whatever animal or human form is to be suggested, must be projected on a flat surface; that all the features of the countenance, the folds of the drapery, the involutions of the limbs, must be so reduced and subdued that the whole work becomes rather a piece of fine drawing than of sculpture; and then follow out, until you begin to perceive their endlessness, the resulting differences of character which will be necessitated in every part of the ornamental designs of these incrusted churches, as compared with that of the Northern schools. I shall endeavor to trace a few of them only.

§ XXXVIII. The first would of course be a diminution of the builder’s dependence upon human form as a source of ornament: since exactly in proportion to the dignity of the form itself is the loss which it must sustain in being reduced to a shallow and linear bas-relief, as well as the difficulty of expressing it at all under such conditions. Wherever sculpture can be solid, the nobler characters of the human form at once lead the artist to aim at its representation, rather than at that of inferior organisms; but when all is to be reduced to outline, the forms of flowers and lower animals are always more intelligible, and are felt to approach much more to a satisfactory rendering of the objects intended, than the outlines of the human body. This inducement to seek for resources of ornament in the lower fields of creation was powerless in the minds of the great Pagan nations, Ninevite, Greek, or Egyptian: first, because their thoughts were so concentrated on their own capacities and fates, that they preferred the rudest suggestion of human form to the best of an inferior organism; secondly, because their constant practice in solid sculpture, often colossal, enabled them to bring a vast amount of science into the treatment of the lines, whether of the low relief, the monochrome vase, or shallow hieroglyphic.