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."....