Simultaneously, though quite apart, marked tendencies of a different character were evident. The old masters of the T'ang period had again returned to favor. The vivid illumination and color distinct from drawing, in these firm and vigorous works appealed to the untutored barbarian. On the other hand, the studies of the Sung period had not been fruitless; therefore when, under these influences, the use of color was resumed, the painters profited by what the practice of monochrome had taught meanwhile. In the Yüan period appear those paintings which are attacked directly with a dripping brush without preliminary drawing, the forms being modeled in the color itself. The Chinese called this painting "without bones," in other words, deprived of the assistance of line. This procedure was first used by a painter of the Sung period, but it did not take root definitely until the time when the practice of using Chinese ink as a medium to express tones had taught painters how to model forms in color itself, making the structure depend upon color. Seen as a whole, the Yüan period witnessed the assembling, the concentration, so to speak, of the ardent but scattered inspirations of the great masters of the preceding school. It produced splendid compositions in which the golden age of Chinese painting continued to be manifest. Masters arose and if, in spite of all, they mark a reaction toward the Northern style, seeking rich and vivid color, they give us a vision of beauty that is equal to the work of their predecessors. Meanwhile grave signs of decadence were apparent. Composition became overladen and complex and began to lose something of the noble simplicity, greatness and supreme charm of the old masters. It was evident that the Yüan painters were working under the eye of the barbarians. They yielded to the taste of the latter for anecdote, for surmounting difficulties and for sentimental detail. Thus far there were only scarcely perceptible shadows and momentary weaknesses, warning signs of decadence; but when such signs are evident, decadence is at hand, and that which the virility of the barbarians had preserved was to be lost through the creed-bound dignity of an academic China, which was imprisoned in a rigid system of rules. VII. THE MING PERIOD--FOURTEENTH TO SEVENTEENTH CENTURIES