We are now concerned with the location and topography of the ancient Babylonian and Assyrian kingdoms, and of those districts lying adjacent. North of the Persian Gulf some considerable distance, we find the Armenian mountains. These ranges are loftier than most in Western Asia, piercing high above the eternal snow-line. During winter their sides and gorges are massed with snow, which melts rapidly with the warmth of spring and heat of summer. The drainage of the mountains has resulted in many streams, which unite to form the Euphrates on the western slopes, and on the eastern slopes, form the Tigris. Ages ago these two rivers emptied into the Persian Gulf at points some distance from each other. But such heavy deposits of rich mountain loam have been brought down by the streams, that they have extended the land far into the gulf, pushing the water back for some hundred miles. Joining one another in the area thus formed, the waters of the two streams reach the gulf today as one mighty river with many mouths. We may judge how great changes this land-building process has wrought by the fact that the town of Ur, now nearly two hundred miles from the gulf, was a sea-port at the time of which we are now studying. The annual increase of the land is about 115 feet. Herodotus' statement that "Egypt is the gift of the Nile," might have been made with equal truth of the Euphrates and Babylonia. Here again an annual overflow refreshes a valley, while in antiquity a network of canals provided water, fertility, and humidity for districts sloping off gently on either side. Today this territory is held by the Turks, and with their ruinous policy of trying to extract all possible revenue from their lands while doing nothing to improve them, the old canals are abandoned, none others take their place, and the rivers wander today at will, leaving part of the area parched and unproductive, and converting the rest into fever-breeding swamps and marshes. The Euphrates is the longer of the two rivers. Taking its rise west of a lofty mountain, it receives several tributaries near its source, but none join it during the last eight hundred miles of its course. The snows melt gradually; in March the stream begins to overflow its channel; high water mark is reached by the first of June, and July finds the waters receding. This river is very winding in its course, at one place being but one hundred miles from the Mediterranean Sea and near Babylon running along within twenty-five miles of the Tigris, only to immediately branch off again to the south. Its entire length is about eighteen hundred miles, and most of the water is spent before it reaches the Gulf.