The Philosophers have written much of their Lead which is prepared out of Antimony, as Basilius hath taught; and I am of the opinion, that this Saturnine Work of the most excellent Philosopher M. John Isaac Holland is not to be understood of common Lead, (if the matter of the Stone be not much more thereby intended) but of the Philosophers' Lead. But whether the Vulgar Saturn be the Matter of the Philosophers Stone, thereof you will receive sufficient satisfaction from the subsequent 17 Considerations or Documents. This is published for the benefit of all the Lovers of this Art, because it expound and declares the Stone of Fire.