There was no better place than this once-lovely region, now hidden from view in the lurid smoke and the poisoned fumes of a new and demoniac sort of war, in which to watch the swift growth to a splendid self-consciousness of Gothic architecture. The elements of Gothic organism had been developed in the twelfth century by the great Cluniac-Norman alliance, but this was only a beginning; Gothic quality was still to be achieved, and this consisted largely in three elements--cohesion, economy, and character. The first means the synthetic knitting of everything together, and the giving it dynamic power to develop from within outward; it means making structure absolutely central and comprehensive, but also beautiful; ornament, decoration, remaining something added to it, something of the _bene esse_, though not of the _esse_; deriving from it in every instance, but not necessary to its perfection. The second is the reducing of mass to its logical and structural (and also optical) minimum, bringing into play the forces of accommodation, balance, and active, as opposed to passive, resistance. The third is the hardest to describe or determine, and probably can only be perceived through comparison. It is the differentiation in quality, the [Illustration: LAON] determination of personality, and it is hardly to be defined, though it is instantly perceived. In the Abbaye aux Hommes, or Cérisy, or St. Georges de Bocherville, we find great majesty and beauty, many elements that are distinctive of true Gothic work and persist through its entire course, but none of these buildings is actually Gothic. In St. Germer de Fly, however, and in Sens and Noyon, while there seems at first little differentiation from the others, the Gothic spirit has found itself and is already working rapidly toward its consummation.