Great Britain took control of candida
I believe he expanded on Hippocrates' theory of humors by associating a specific human temperament (passion, kindness, etc.) to each humor.
Another theory is that the shape of the serpent imitates the constellation Draco, with the Pole Star matching the placement of the first curve in the snake's torso from the head. An alignment with the Pole Star may indicate that the mound was used to determine true north and thus served as a kind of compass.