XI. For that period, then, we must build; not, indeed, refusing to ourselves the delight of present completion, nor hesitating to follow such portions of character as may depend upon delicacy of execution to the highest perfection of which they are capable, even although we may know that in the course of years such details must perish; but taking care that for work of this kind we sacrifice no enduring quality, and that the building shall not depend for its impressiveness upon anything that is perishable. This would, indeed, be the law of good composition under any circumstances, the arrangement of the larger masses being always a matter of greater importance than the treatment of the smaller; but in architecture there is much in that very treatment which is skilful or otherwise in proportion to its just regard to the probable effects of time: and (which is still more to be considered) there is a beauty in those effects themselves, which nothing else can replace, and which it is our wisdom to consult and to desire. For though, hitherto, we have been speaking of the sentiment of age only, there is an actual beauty in the marks of it, such and so great as to have become not unfrequently the subject of especial choice among certain schools of art, and to have impressed upon those schools the character usually and loosely expressed by the term "picturesque." It is of some importance to our present purpose to determine the true meaning of this expression, as it is now generally used; for there is a principle to be developed from that use which, while it has occultly been the ground of much that is true and just in our judgment of art, has never been so far understood as to become definitely serviceable. Probably no word in the language (exclusive of theological expressions), has been the subject of so frequent or so prolonged dispute; yet none remained more vague in their acceptance, and it seems to me to be a matter of no small interest to investigate the essence of that idea which all feel, and (to appearance) with respect to similar things, and yet which every attempt to define has, as I believe, ended either in mere enumeration of the effects and objects to which the term has been attached, or else in attempts at abstraction more palpably nugatory than any which have disgraced metaphysical investigation on other subjects. A recent critic on Art, for instance, has gravely advanced the theory that the essence of the picturesque consists in the expression of "universal decay." It would be curious to see the result of an attempt to illustrate this idea of the picturesque, in a painting of dead flowers and decayed fruit, and equally curious to trace the steps of any reasoning which, on such a theory, should account for the picturesqueness of an ass colt as opposed to a horse foal. But there is much excuse for even the most utter failure in reasonings of this kind, since the subject is, indeed, one