underground, in the neighbourhood of the Bank of England and the Mansion House, although London has not been buried in volcanic ashes. Rome itself is a buried city, for the capital of modern Italy stands upon the ruins of the city of the Cæsars. In Eastern countries the site of an ancient city is sometimes occupied by a squalid village, which is its degenerate successor; in other instances the site is quite deserted, and only a tell or mound remains to call attention to it. Ancient sites have also occasionally become submerged beneath the waters of seas or lakes. Thus the Lake of Aboukir in Egypt was drained lately, in order to reclaim the area for cultivation, and when the floor was laid bare from the water, there appeared everywhere traces of streets, of stone-covered ways, and of fields for tillage marked out by lines of shells.
Professor Maspero describes the process by which Egyptian temples become buried. "Just as in Europe during the Middle Ages the population crowded most densely round about the churches and abbeys, so in Egypt they swarmed around the temples, profiting by that security which the terror of his name and the solidity of his ramparts ensured to the local deity. A clear space was at first reserved round the pylons and the walls; but in course of time the houses encroached upon this ground, and were even built up against the boundary wall. Destroyed and rebuilt, century after century, upon the self-same spot, the débris of these surrrounding dwellings so raised the level of the soil that the temples ended for the most part by being gradually buried in a hollow, formed by the artificial elevation of the surrounding city. Herodotus mentions this of Bubastis, and on examination it is seen to have been the same in many other localities. At last, when the temple had been thrown down and was forsaken, the rubbish covered it up, and so the ruins have been preserved to reward the modern explorer."
