In Babylonia there are two seasons--the rainy and the dry. Rain falls from November till March, and the plain is carpeted in spring by patches of vivid green verdure and brilliant wild flowers. Then the period of drought ensues; the sun rapidly burns up all vegetation, and everywhere the eye is wearied by long stretches of brown and yellow desert. Occasional sandstorms darken the heavens, sweeping over sterile wastes and piling up the shapeless mounds which mark the sites of ancient cities. Meanwhile the rivers are increasing in volume, being fed by the melting snows at their mountain sources far to the north. The swift Tigris, which is 1146 miles long, begins to rise early in March and reaches its highest level in May; before the end of June it again subsides. More sluggish in movement, the Euphrates, which is 1780 miles long, shows signs of rising a fortnight later than the Tigris, and is in flood for a more extended period; it does not shrink to its lowest level until early in September. By controlling the flow of these mighty rivers, preventing disastrous floods, and storing and distributing surplus water, the ancient Babylonians developed to the full the natural resources of their country, and made it--what it may once again become--one of the fairest and most habitable areas in the world. Nature conferred upon them bountiful rewards for their labour; trade and industries flourished, and the cities increased in splendour and strength. Then as now the heat was great during the long summer, but remarkably dry and unvarying, while the air was ever wonderfully transparent under cloudless skies of vivid blue. The nights were cool and of great beauty, whether in brilliant moonlight or when ponds and canals were jewelled by the lustrous displays of clear and numerous stars which glorified that homeland of the earliest astronomers.