This is from Stan Kegel.

Passover is approaching. At the sedar table, every Jewish child will be retold the story of Moses and the Pharaoh, and how God brought boils, locusts, hail and the other plagues onto the Egyptians. Yet, in spite of this overwhealming evidence of God’s power and intentions, Pharaoh refused to let God’s people go. Finally, a tenth plague, the death of the first-born male children was inflicted on every Egyptian home, passing over the homes of the Hebrews. Only after this tragedy did the Pharaoh relent and let the Hebrews leave slavery and Egypt to begin their journey to the promised land.

This has been known for generations. What has not been known is why the Pharaoh, in the face of such overwealming evidence would refuse to release the Hebrews ater the first nine plagues. It took eight years of research by Elizabeth Kubler-Ross, the renouned psychologist and nurse, to find the definative answer. Dr. Kubler-Ross spent those years studying the Dead Sea Scrolls before discovering the answer. And once found, it was obvious…..The Pharaoh was still in de Nile.