REBIS is represented as an hermetic hermaphrodite. The already mentioned figure with the two heads (figure 2) is found (as Höhler relates) in a book that appeared in Frankfort in 1618, called “Joannes Danielis Mylii Tractatus III, seu Basilica Philosophica,” though it is to be seen also in other books on alchemy. The hermaphrodite stands on a dragon that lies on a globe. In the right hand he holds a _pair of compasses_, in the left a _square_. On the globe we see a _square_ and a _triangle_. Around the figure are the signs of the seven planets, with [Symbol: Mercury] at the top. In a cut in the Discursus Nobilis of John of Munster we see _sun_ and _moon_, at the middle of the top the _star_ [Symbol: Hexagram], also denoted by Y = γλζ (= matter) surrounded by _rays_. (Höhler, Herm. Phil., p. 105.) In the cabala, which has found admission into the idea of the alchemists and rosicrucians, no small part is played by _three pillars_ and _two pillars_. Tubal Cain was renowned as a great alchemist. He was the patriarch of wisdom, a master of all kinds of brass and iron work. (Genesis IV, 22.) He had the knowledge not only of ordinary chemistry and of the fire required for it, but also of the higher chemistry and of the hidden elemental fire. After the flood there was no other man who knew the art but the righteous Noah, whom some call Hermogenes or Hermes, who possessed the knowledge of celestial and terrestrial things. One devoted to art must be a _free man_ (Höhler, l. c., p. 66). The _ordinale_ of Norton establishes it more or less as follows: “The kings in the olden time have ordained that no one should learn the liberal sciences except the free and those of noble spirit, and any one who is devoted to them should devote his life most freely. Accordingly the ancients have called them the seven liberal arts, for whoever desires to learn thoroughly and well must enjoy a certain freedom.” [Occult image.] Figure 3.