The story of Gilgamesh's birth is not recorded in any extant Sumerian or Akkadian text, but a version of it is described in "De Natura Animalium" ("On the Nature of Animals") 12.21, a commonplace book which was written in Greek sometime around 200 AD by the Hellenized Roman orator Aelian. According to Aelian's story, an oracle told King Seuechoros of the Babylonians that his grandson Gilgamos would overthrow him. To prevent this, Seuechoros kept his only daughter under close guard at the Acropolis of the city of Babylon, but she became pregnant nonetheless. Fearing the king's wrath, the guards hurled the infant off the top of a tall tower. An eagle rescued the boy in mid-flight and carried him to an orchard, where it carefully set him down. The caretaker of the orchard found the boy and raised him, naming him "Gilgamos" (Γίλγαμος). Eventually, Gilgamos returned to Babylon and overthrew his grandfather, proclaiming himself king. The birth narrative described by Aelian is in the same tradition as other Near Eastern birth legends, such as those of Sargon, Moses, and Cyrus. Theodore Bar Konai (c. AD 600), writing in Syriac, also mentions a king "Gligmos", "Gmigmos" or "Gamigos" as last of a line of twelve kings who were contemporaneous with the patriarchs from Peleg to Abraham; this occurrence is also considered a vestige of Gilgamesh's former memory.