Thousands of years have passed since the foundation of the first Egyptian dynasty. The Pyramids have seen the old empire, the Hycksos monarchs, the New Empire, the Persian, the Macedonian, the Roman, the Mohammedan. They have stood while the heavens themselves have changed. They were already "five hundred years old when the Southern Cross disappeared from the horizon of the countries of the Baltic." The pole-star itself is a newcomer to them. Humboldt, referring to these incidents, remarks that "the past seems to be visibly nearer to us when we thus connect its measurement with great and memorable events." No country has had such a varied history as this birthplace of European civilization. Through the darkness of fifty centuries we may not be able to discern the motives of men, but through periods very much longer we can demonstrate the conditions of Nature. If nations, in one sense, depend on the former, in a higher sense they depend on the latter. It was not without reason that the Egyptians took the lead in Mediterranean civilization. The geographical structure of their country surpasses even its hoary monuments in teaching us the conditions under which that people were placed. Nature is a surer guide than the traces of man, whose works are necessarily transitory. The aspect of Egypt has changed again and again; its structure, since man has inhabited it, never. The fields have disappeared, but the land remains. Why was it that civilization thus rose on the banks of the Nile, and not upon those of the Danube or Mississippi? Civilization depends on climate and agriculture. In Egypt the harvests may ordinarily be foretold and controlled. Of few other parts of the world can the same be said. In most countries the cultivation of the soil is uncertain. From seed-time to harvest, the meteorological variations are so numerous and great, that no skill can predict the amount of yearly produce. Without any premonition, the crops may be cut off by long-continued droughts, or destroyed by too much rain. Nor is it sufficient that a requisite amount of water should fall; to produce the proper effect, it must fall at particular periods. The labour of the farmer is at the mercy of the winds and clouds.