Max Duncker, The History of Antiquity, Vol. 3…
“ We are not in a position to fix definitely the place of this year. A tablet of Erech bears the date of 20 Nisan of the twentieth year of Assurbanipal in Babel (Ménant, "Annal." p. 29 ff.) . As Assurbanipal must have dated his rule in Babylon from the overthrow of Samul-sum-ukin, and Assurbanipal himself died in the year 626 B.C., Samul-sum-ukin's death must have taken place at least before 646 B.C. On the cylinders and on the reliefs in his palace at Nineveh, Assurbanipal merely calls himself king of Asshur. ”
