The eye of a man cannot endure any thing that is imperfect, how little soever it be, though it be the least Atome of Dust, it would cause much pain, that he can rest no where. But if you take the quantity of a Bean of _Saturn_, shave it smooth and round, put it into the Eye, it will cause no pain at all; the reason is, because it is internally perfect, even as Gold and Precious Stones. By these and other Speeches you may observe, that _Saturn_ is our _Philosophers Stone_, and our _Latten_, out of which our _Mercury_ and our Stone is extracted with small Labour, little Art and Expence, and in a short time. Wherefore I admonish you, my Child, and all those who know its name, that you conceal it from people, by reason of the evil which might thence arise; and you shall call the Stone our _Laton_, and call the Vinegar Water, wherein our Stone is to be wash'd; this is the Stone and the Water whereof the Philosophers have wrote so many great Volumes. There are many and different works in the Mineral Stone, and especially in that Stone which God hath given us _gratis_, whereof many strange Parables are written in the Mineral Book. But this is the true Stone, which the Philosophers have sought, because it makes projection upon all the imperfect Metals, especially upon quick _Mercury_, and moreover it makes projection upon all diseases whatsoever, which may come into mans Body, as likewise upon all Wounds, _Cancer_, _Fistulaes_, _open Sores_, _Buboes_, _Imposthumes_, and all whatsoever can come externally upon mans Body, therefore this Stone is not under the Mineral work, but under the Vegetable. It is the beginning of the Vegetable Book, and the principal; this Stone is called _Lapis Philosophorum_, the Mineral Stone is called _Lapis Mineralis_, and the third Stone is called _Lapis Animalis_. This Stone is the true _Aurum potabile_, the true Quinessence which we seek, and no other thing else in this world but this Stone. Therefore the Philosophers say, whosoever knows our Stone, and can prepare it, needs no more, wherefore they sought this thing and no other.