on the light, not united with the shade, which are the most common causes of hardness; but it appears to me, that in the present instance the hardness of manner proceeds from the softness hereon being too general; the light being every where equally lost in the ground or its shadow, for this is not expressing the true effect of flesh, the light of which is sometimes losing itself in the ground, and sometimes distinctly seen, according to the rising and sinking of the muscles; an attention to these variations is what gives the effect of suppleness, which is one of the characteristics of a good manner of colouring."