It [a snake] is a divine hieroglyph of the demoniac power of the earth - of the entire earthly nature. As the bird is the clothed power of the air, so this is the clothed power of the dust; as the bird the symbol of the spirit of life, so this of the grasp and sting of death.
The Queen of the Air, Chapter II, 68 (p. 98), George Allen. 1903