Hieroglyphics of Horapollo: Book I: LXIII. How a King Who Governs a Part of the World
Hieroglyphics of Horapollo, tr. Alexander Turner Cory, [1840]
When they would symbolize a king who governs not all but a part of the world, they depict HALF A SERPENT. For by this creature they denote a king, and by half of it, that he is not king over all the world.