At the beginning of all things, when the world was new, and men were finding out bit by bit what they could do and how to do it, there were two countries that were more important than any others. They were both the valleys of great rivers, and it was the rivers that made them what they were. The one country was Egypt-that wonderful land where the Nile comes rolling down from the Great Lake Basin of equatorial Africa, and flows for hundreds of miles between temples and pyramids erected by the greatest builders the world has ever seen. About Egypt, two of these little books have already told you."