Plutarch, On Isis and Osiris

Plutarch's treatise (De Iside et Osiride, c. AD 100), addressed to the Delphic priestess Clea — the only continuous ancient narrative of the Osiris myth (sections 12–19), followed by a survey of the physical, astronomical and philosophical readings the Egyptians and Greeks gave it. Its author is a Greek priest who warns that none of it "actually happened in the manner in which they are related".