SECTION 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. SECTION XXXIX. But when various ideas adverse to the representation of animal, and especially of human, form, originating with the Arabs and iconoclast Greeks, had begun at any rate to direct the builders' minds to seek for decorative materials in inferior types, and when diminished practice in solid sculpture had rendered it more difficult to find artists capable of satisfactorily reducing the high organisms to their elementary outlines, the choice of subject for surface sculpture would be more and more uninterruptedly directed to floral organisms, and human and animal form would become diminished in size, frequency, and general importance. So that, while in the Northern solid architecture we constantly find the effect of its noblest features dependent on ranges of statues, often colossal, and full of abstract interest, independent of their architectural service, in the Southern incrusted style we must expect to find the human form for the most part subordinate and diminutive, and involved among designs of foliage and flowers, in the manner of which endless examples had been furnished by the fantastic ornamentation of the Romans, from which the incrusted style had been directly derived.