Watts.
XI
THE SIX CANONS OF ART
Rhythmic vitality, anatomical structure, conformity with nature, suitability of colouring, artistic composition, and finish.
Hsieh Ho (Chinese, sixth century A.D.).
XII
In painting, the most troublesome subject is man, then landscape, then dogs and horses, then buildings, which being fixed objects are easy to manage up to a certain point, but of which it is difficult to get finished pictures.