§ XI. And the simplicity of the means here employed may help us, both to some clear understanding of the spirit of Ninevite and Egyptian work, and to some perception of the kind of enfantillage or archaicism to which it may be possible, even in days of advanced science, legitimately to return. The architect has no right, as we said before, to require of us a picture of Titian's in order to complete his design; neither has he the right to calculate on the co-operation of perfect sculptors, in subordinate capacities. Far from this; his business is to dispense with such aid altogether, and to devise such a system of ornament as shall be capable of execution by uninventive and even unintelligent workmen; for supposing that he required noble sculpture for his ornament, how far would this at once limit the number and the scale of possible buildings? Architecture is the work of nations; but we cannot have nations of great sculptors. Every house in every street of every city ought to be good architecture, but we cannot have Flaxman or Thorwaldsen at work upon it: nor, even if we chose only to devote ourselves to our public buildings, could the mass and majesty of them be great, if we required all to be executed by great men; greatness is not to be had in the required quantity. Giotto may design a campanile, but he cannot carve it; he can only carve one or two of the bas-reliefs at the base of it. And with every increase of your fastidiousness in the execution of your ornament, you diminish the possible number and grandeur of your buildings. Do not think you can educate your workmen, or that the demand for perfection will increase the supply: educated imbecility and finessed foolishness are the worst of all imbecilities and foolishnesses; and there is no free-trade measure, which will ever lower the price of brains,--there is no California of common sense. Exactly in the degree in which you require your decoration to be wrought by thoughtful men, you diminish the extent and number of architectural works. Your business as an architect, is to calculate only on the co-operation of inferior men, to think for them, and to indicate for them such expressions of your thoughts as the weakest capacity can comprehend and the feeblest hand can execute. This is the definition of the purest architectural abstractions. They are the deep and laborious thoughts of the greatest men, put into such easy letters that they can be written by the simplest. _They are expressions of the mind of manhood by the hands of childhood._