The valley of the Nile had attracted people because it had offered them food upon fairly easy terms. The "land between the rivers" was popular for the same reason. It was a country full of promise and both the inhabitants of the northern mountains and the tribes which roamed through the southern deserts tried to claim this territory as their own and most exclusive possession. The constant rivalry between the mountaineers and the desert-nomads led to endless warfare. Only the strongest and the bravest could hope to survive and that will explain why Mesopotamia became the home of a very strong race of men who were capable of creating a civilisation which was in every respect as important as that of Egypt. THE SUMERIANS THE SUMERIAN NAIL WRITERS, WHOSE CLAY TABLETS TELL US THE STORY OF ASSYRIA AND BABYLONIA, THE GREAT SEMITIC MELTING-POT THE fifteenth century was an age of great discoveries. Columbus tried to find a way to the island of Kathay and stumbled upon a new and unsuspected continent. An Austrian bishop equipped an expedition which was to travel eastward and find the home of the Grand Duke of Muscovy, a voyage which led to complete failure, for Moscow was not visited by western men until a generation later. Meanwhile a certain Venetian by the name of Barbero had explored the ruins of western Asia and had brought back reports of a most curious language which he had found carved in the rocks of the temples of Shiraz and engraved upon endless pieces of baked clay. But Europe was busy with many other things and it was not until the end of the eighteenth century that the first "cuneiform inscriptions" (so-called because the letters were wedge-shaped and wedge is called "Cuneus" in Latin) were brought to Europe by a Danish surveyor, named Niebuhr. Then it took thirty years before a patient German school-master by the name of Grotefend had deciphered the first four letters, the D, the A, the R and the SH, the name of the Persian King Darius. And another twenty years had to go by until a British officer, Henry Rawlinson, who found the famous inscription of Behistun, gave us a workable key to the nail-writing of western Asia.