251. Of the ornament itself, it is to be observed that it is not to be what is properly called architectural _decoration_ (that which is "decorous," becoming, or suitable to), namely, the combination of minor forms, which repeat the lines, and partake of the essence of the grand design, and carry out its meaning and life into its every member; but it is to be true sculpture; the presenting of a pure ideality of form to the eye, which may give perfect conception, without the assistance of color: it is to be the stone image of vegetation, not botanically accurate, indeed, but sufficiently near to permit us to be sure of the intended flower or leaf. Not a single line of any other kind of ornament should be admitted, and there should be more leafage than flower-work, as it is the more easy in its flow and outline. Deep relief need not be attempted, but the edges of the leafage should be clearly and delicately defined. The cabbage, the vine, and the ivy are the best and most beautiful leaves: oak is a little too stiff, otherwise good. Particular attention ought to be paid to the ease of the stems and tendrils; such care will always be repaid. And it is to be especially observed, that the carving is not to be arranged in garlands or knots, or any other formalities, as in Gothic work; but the stalks are to rise out of the stone, as if they were rooted in it, and to fling themselves down where they are wanted, disappearing again in light sprays, as if they were still growing. 252. All this will require care in designing; but, as we have said before, we can always do without decoration; but, if we have it, it _must_ be well done. It is not of the slightest use to economize; every farthing improperly saved does a shilling's worth of damage; and that is getting a bargain the wrong way. When one branch or group balances another, they _must_ be different in composition. The same group may be introduced several times in different parts, but not when there is correspondence, or the effect will be unnatural; and it can hardly be too often repeated, that the _ornament_ must be kept out of the general effect, must be invisible to all but the near observer, and, even to him, must not become a necessary part of the design, but must be sparingly and cautiously applied, so as to appear to have been thrown in by chance here and there, as Nature would have thrown in a bunch of herbage, affording adornment without concealment, and relief without interruption.