sense and reason, any such blazing Spirit in me; but I have found by experience, that when my mind and thoughts have been benighted with Melancholy, my Imagination hath been more active and subtil, then when my mind has been clear from dark Melancholy: Also I find that my thoughts and conceptions are as active, if not more, in the night then in the day; and though we may sometimes dream of several Lights, yet I cannot perceive a constant light in us; however Light, Blazes, and all those effects are no more then other effects of Nature are; nor can they have more power on other Creatures, then other Creatures have on them: Neither are they made otherwise then by the corporeal motions of Natural Matter, and are dissolved and transchanged as other Creatures, out of one form or figure into another. Next your _Author_ discoursing[2] whether there be any Vacuum in Nature, doth incline to the affirming party, that there is a Vacuum in the Air; to wit, _There is in the air something, that is less then a body, which fills up the emptinesses or little holes and pores in the air, and which is wholly annihilated by fire; It is actually void of all matter, and is a middle thing between a body and an Incorporeal Spirit, and almost nothing in respect of bodies; for it came from Nothing, and so may easily be reduced to nothing._ All this, _Madam_, surpasses my capacity; for I can in no ways conceive any thing between something and nothing, as to be less then something, and more then nothing; for all that is corporeal in Nature, is to my reason something; that is, some really existent thing; but what is incorporeal in Nature, is nothing; and if there be any absolute vacuum in Nature, as your _Author_ endeavours to prove, then certainly this Vacuum cannot be any thing whatsoever; for a Vacuum is a pure Nothing. But many ingenious and learned men have brought as many arguments and reasons against Vacuum, as others bring for it, and so it is a thing which I leave to them to exercise their brains withal. The like is the opinion which many maintain concerning Place, _viz._ that there is a constant succession of Place and Parts, so that when one part removes, another doth succeed in its place; the truth and manner whereof I was never able to comprehend: for, in my opinion, there can be no place without body, nor no body without place, body and place being all but one thing. But as for the perpetual Creation and annihilation of your _Authors_ Vacuities, give me leave to tell you, _Madam_, that it would be a more laborious work, then to make a new World, or then it was to make this present World; for God made this World in six days, and rested the seventh day; but this is a perpetual making of something out of nothing. Again: concerning Rainbows, your _Author_ says,[3] That _a Rainbow is not a natural effect of a natural Cause, but a divine Mystery in its original; and that it has no matter, but yet is in a place, and