II. It will be thought that I have somewhat rashly limited the elements of architectural beauty to imitative forms. I do not mean to assert that every arrangement of line is directly suggested by a natural object; but that all beautiful lines are adaptations of those which are commonest in the external creation; that in proportion to the richness of their association, the resemblance to natural work, as a type and help, must be more closely attempted, and more clearly seen; and that beyond a certain point, and that a very low one, man cannot advance in the invention of beauty, without directly imitating natural form. Thus, in the Doric temple, the triglyph and cornice are unimitative; or imitative only of artificial cuttings of wood. No one would call these members beautiful. Their influence over us is in their severity and simplicity. The fluting of the column, which I doubt not was the Greek symbol of the bark of the tree, was imitative in its origin, and feebly resembled many caniculated organic structures. Beauty is instantly felt in it, but of a low order. The decoration proper was sought in the true forms of organic life, and those chiefly human. Again: the Doric capital was unimitative; but all the beauty it had was dependent on the precision of its ovolo, a natural curve of the most frequent occurrence. The Ionic capital (to my mind, as an architectural invention, exceedingly base) nevertheless depended for all the beauty that it had on its adoption of a spiral line, perhaps the commonest of all that characterise the inferior orders of animal organism and habitation. Farther progress could not be made without a direct imitation of the acanthus leaf. Again: the Romanesque arch is beautiful as an abstract line. Its type is always before us in that of the apparent vault of heaven, and horizon of the earth. The cylindrical pillar is always beautiful, for God has so moulded the stem of every tree that it is pleasant to the eyes. The pointed arch is beautiful; it is the termination of every leaf that shakes in summer wind, and its most fortunate associations are directly borrowed from the trefoiled grass of the field, or from the stars of its flowers. Further than this, man's invention could not reach without frank imitation. His next step was to gather the flowers themselves, and wreathe them in his capitals.