Plutarch De Iside et Osiride 44

[44] There are some who would make the legend an allegorical reference to matters touching eclipses; for the Moon suffers eclipse only when she is full, with the Sun directly opposite to her, and she falls into the shadow of the Earth, as they say Osiris fell into his coffin. Then again, the Moon herself obscures the Sun and causes solar eclipses, always on the thirtieth of the month; however, she does not completely annihilate the Sun, and likewise Isis did not annihilate Typhon.

When Nephthys gave birth to Anubis, Isis treated the child as if it were her own ¹ ; for Nephthys is that which is beneath the Earth and invisible, Isis that which is above the earth and visible; and the circle which touches these, called the horizon, being common to both, ² has received the name Anubis, and is represented in form like a dog; for the dog can see with his eyes both by night and by day alike. And among the Egyptians Anubis is thought to possess this faculty, which is similar to that which Hecatê is thought to possess among the Greeks, for Anubis is a deity of the lower world as well as a god of Olympus. Some are of the opinion that Anubis is Cronus. For this reason, inasmuch as he generates all things out of himself and conceives all things within himself, he has gained the appellation of Dog. ³ There is, therefore, a certain mystery observed by those who revere Anubis; in ancient times the dog obtained the highest honours in Egypt; but, when Cambyses ⁴ had slain the Apis and cast him forth, nothing came near the body or ate of it save only the dog; and thereby the dog lost his primacy and his place of honour above that of all the other animals.

There are some who give the name of Typhon to the Earth’s shadow, into which they believe the moon slips when it suffers eclipse. ⁵

[44] But there are some that will have this tale to be a figurative representation of the eclipses. For the moon is under an eclipse at the fill, when the sun is in opposition to her, because she then falls into the shadow of the earth, as they say Osiris did into his chest. But she hides and obscures the sun at the new moon, upon the thirtieth day of the month, but doth not extinguish the sun quite, any more than Isis did Typhon. And when Nephthys was delivered of Anubis, Isis owned the child. For Nephthys is that part of the world which is below the earth, and invisible to us; and Isis that which is above the earth, and visible. But that which touches upon both these, and is called the horizon (or bounding circle) and is common to them both, is called Anubis, and resembles in shape the dog, because the dog makes use of his sight by night as well as by day. And therefore Anubis seems to me to have a power among the Egyptians much like to that of Hecate among the Grecians, he being as well terrestrial as Olympic. Some again think Anubis to be Saturn; wherefore, they say, because he produces all things out of himself and breeds them in himself, he had the name of Kyon (which signifies in Greek both a dog and a breeder). Moreover, those that worship the dog have a certain secret meaning that must not be here revealed. And in the more remote and ancient times, the dog had the highest honor paid him in Egypt; but after that Cambyses had slain the Apis and thrown him away contemptuously like a carrion, no animal came near to him except the dog only; upon this he lost his first honor and the right he had of being worshipped above other creatures. There are also some that will have the shadow of the earth, into which they believe the moon to fall when eclipsed, to be called Typhon.