Of Yen Hui we know almost nothing; the books state briefly that he painted Buddhist figures, birds and flowers, and that he was past master in the painting of demons. Nothing is known of the date of his birth or if, by his age and training, he could be classed in the Sung period, but several admirable paintings by him are extant which serve to show how Sung art was still interpreted by exceptional masters in the Yüan period. His line is strong, broader, fuller and more abrupt than that of Chao Mêng-fu or Ch'ien Shun-chü. The quivering vitality that emanates from his pictures is thrilling. Whether the subject is a peony heavy with dew, whose drooping petals presage the approaching end, or a Buddhist monk patching his mantle, the fleeting moment is seized with such intuitive power that prolonged contemplation of the painting creates the impression that it is suddenly about to come to life. There is something sturdier, more startling, less dreamy in these great painters who continue the traditions of Sung art; their work alone demonstrated that tradition could be revived and that ancient China, under the Mongolian dynasty, was still preserving its creative spirit and advancing resolutely into fertile fields. In Huang Kung-wang and Ni Tsan, we approach a different order of things. Lines began to take on a classical character, to be divided into a series of different types, which painters adopted according to their temperament and requirements, and finally became impersonal and academic. Both of these painters, nevertheless, were under the spell of early influences extending back to the T'ang artists. Through study of these old masters they returned to the use of a full and sometimes vivid color, but kept a profound love of nature, and a fresh and original vision, by which they still perpetuated the inspiration of Sung painting in a new form. With these painters, however, new features appeared. Reds and purples became dominant notes amidst rich greens which set them off and enhanced their brilliancy. The vision of landscape itself is somewhat more realistic and less subtle. In all of these essentials Ni Tsan, who died in 1374, brings us nearer to the Ming period. [Illustration: PLATE XVIII. VISIT TO THE EMPEROR BY THE IMMORTALS FROM ON HIGH Ming Period. British Museum, London.]