After showing that Manetho’s source material included some unhistorical traditions and legends that “introduced kings as their heroes, without regard to chronological order,” he says: “There were many errors in Manetho’s work from the very beginning: all are not due to the perversions of scribes and revisers. Many of the lengths of reigns have been found impossible: in some cases the names and the sequence of kings as given by Manetho have proved untenable in the light of monumental evidence.”—Manetho, introduction, pp. vii, xvii, xx, xxi, xxv
Insight On the Scriptures-Volume I. 1988. p. 450