You must note, that sometimes it comes to passe, that the Archeius of the earth doth by some secret passage cast up some Metall from the more inward part of the earth. And that is a good signe. Miners therefore must not bee discouraged when they see such certaine signes, and hope of some excellent Mine lying under. And if thin leaves of Metalls, like Talke, do adhere to rocks, or stones, that is a most sure sign. [Sidenote: What Coruscations signifie in Mines.] Now concerning Coruscations they must bee diligently, and studiously observed, for, they are most certain signes of Metalls lying hid under them, as also of the same extent, and same kind. Where yet wee must note, that those Metalls are not yet come to perfection, but are as yet in their first being. And whither soever the Coruscation reacheth, so far also reacheth the course of Metalls, &c. [Sidenote: Coruscations are of three colours.] Moreover you must know, that Coruscation is of a threefold colour, as White, Yellow, and Red, whereby all Metalls are discovered to us. For a white Coruscation signifies white Metalls, as Tinne, Lead, Silver, &c. a red Coruscation signifies red Metalls, as Copper, and Iron, &c. a yellow Coruscation signifies golden Metalls. Add moreover, that a thin, and subtil Coruscation is the best signe. For as you see it is in trees, that by how much the fewer flowers there are, so much the better, greater, and more savory are the fruit: so also small and subtile Coruscations signifie subtile and excellent Metalls, as the contrary doe the contrary. Moreover you must know, that as long as those Coruscations appear, whether they be great, or small, or of this or that colour, the Metalls in those Mines have not yet attained to perfection, but are yet in their first being as the sperm of a man in the matrix of a woman. [Sidenote: What Coruscation is.] But now what Coruscation is, wee must consider in this place: and we must know that it appears in the Mines by night like a sparkling fire, no otherwise then gunpowder that is laid in a long train, and being kindled at one end makes a long flashing. After the same manner is Coruscation carried along, from the East to the West, or from the West to the East, from the South to the North, or contrarily. All these Coruscations, how ever they appear, are a certain signe of Courses of Metalls, that by them they may be known, and Metalls as certain gifts of God may be brought forth out of the earth. For what God created for mans use, hee put that nature into it that it should not be hid: and although it were hid, yet he made peculiar externall signes which conduce to the finding of it out, by which the wonderful predestination of it may be known. In the same manner if men hide treasures they marke the place with some certain marks, and bury them by some bound, statue, or fountaine, or any other thing, that when there is occasion they may find, and dig them up again.