In Actions purely Natural, which we perform without Reflection, but which at the same time, spring from a strong Inclination, a Painter shou'd observe what are the first Effects discovering themselves in the Body; and make Sketches of what he Remarks in this kind; for by means of these, he will be enabled on occasion, to place a Body in the same Attitude; from whence he may gather, what Parts are concerned in the Action he wou'd represent.