Nor is it strange that we affirm there are vitriolous parts, qualities, and even at some distance Vitriol it self in living bodies; for there is a sower stiptick salt diffused through the Earth, which passing a concoction in plants, becometh milder and more agreeable unto the sense, and this is that vegetable vitriol, whereby divers plants contain a gratefull sharpness, as Lemmons, Pomegranats, Cherries, or an austere and inconcocted roughness, as Sloes, Medlars and Quinces. And that not only vitriol is a cause of blackness, but that the salts of natural bodies do carry a powerfull stroke in the tincture and vernish of all things, we shall not deny, if we contradict not experience, and the visible art of Dyars; who advance and graduate their colours with Salts. For the decoctions of simples which bear the visible colours of bodies decocted, are dead and evanid, without the commixtion of Alum, Argol, and the like. And this is also apparent in Chymical preparations. So Cinaber becomes red by the acide exhalation of sulphur, which otherwise presents a pure and niveous white. So spirits of Salt upon a blew paper make an orient red. So Tartar or vitriol upon an infusion of violets affords a delightfull crimson. [SN: _Whence the colours of Plants, etc. may arise._] Thus it is wonderful what variety of colours the spirits of Saltpeter, and especially, if they be kept in a glass while they pierce the sides thereof; I say, what Orient greens they will project: from the like spirits in the earth the plants thereof perhaps acquire their verdure. And from such salary irradiations may those wondrous varieties arise, which are observable in Animals, as Mallards heads, and Peacocks feathers, receiving intention or alteration according as they are presented unto the light. Thus Saltpeter, Ammoniack and Mineral spirits emit delectable and various colours; and common _Aqua fortis_ will in some green and narrow mouthed glasses, about the verges thereof, send forth a deep and Gentianella blew. Thus have we at last drawn our conjectures unto a period; wherein if our contemplations afford no satisfaction unto others, I hope our attempts will bring no condemnation on our selves (for besides that adventures in knowledge are laudable, and the assayes of weaker heads afford oftentimes improveable hints unto better) although in this long journey we miss the intended end; yet are there many things of truth disclosed by the way; and the collaterall verity may unto reasonable speculations some what requite the capital indiscovery. CHAPTER XIII Of Gypsies. Great wonder it is not we are to seek in the original of _Æthiopians_ and natural Negroes, being also at a loss concerning the Original of Gypsies and counterfeit Moors, observable in many parts of _Europe_, _Asia_, and _Africa_. [Sidenote: _Opinions concerning the original of Gypsies._]