Thus far, we have given a general account of [Nicolas le Fèvre]'s theory. Further elaboration is to be found in his account of the generation of metals. Here it is suggested that it is light "which by its ejaculation and irradiation did imprint and stamp the Idea and Character of its vertue in water as in a general and convenient Matrix, to enable her afterwards to supply both matter and Form, Body and Spirit, Salt, Sulphur and Mercury, [and] all physical generations...".