Constans saith: What have you to do with the treatises of the envious, for it is necessary that this work should deal with four things? They answer: Demonstrate, therefore, what are those four? And he: Earth, water, air, and fire. Ye have then those four elements without which nothing is ever generated, nor is anything absolved in the Art. Mix, therefore, the dry with the humid, which are earth and water, and cook in the fire and in the air, whence the spirit and the soul are dessicated.* And know ye that the tenuous tingeing agent takes its power out of the tenuous part of the earth, out of the tenuous part cf the fire and of the air, while out of the tenuous part of the water, a tenuous spirit has been dessicated.t This, therefore, is the process of our work, namely, that everything may be turned into earth when the tenuous parts of these things are extracted, because a body is then composed which is a kind of atmospheric thing, and thereafter tinges the imposed body of coins.* Beware, however, O all ye investigators of this art, lest ye multiply things, for the envious have multiplied and destroyed for you! They have also described various regimens that they might deceive; they have further called it (or have likened it to) the humid with all the humid, and the dry with all the dry, by the name of every stone and metal, gall of animals of the sea, the winged things of heaven and reptiles of the earth. But do ye who would tinge observe that bodies are tinged with bodies. For I say to you what the Philosopher said briefly and truly at the beginning of his book. In the art of gold is the quicksilver from Cambar, and in coins is the quicksilver from the Male. In nothing, however, look beyond this, since the two quicksilvers are also one.