and also to provide against collapses, reducing the heights of the new buildings and forbidding that any structure on the public streets should rise as high as seventy feet; but still his constructive measures would have failed by now were it not that the mines and the timber and the easy means of transportation by water still hold out.

8. So much, then, for the blessings with which nature supplies the city; but the Romans have added still others, which are the result of their foresight; for if the Greeks had the repute of aiming most happily in the founding of cities, in that they aimed at beauty, strength of position, harbours, and productive soil, the Romans had the best foresight in those matters which the Greeks made but little account of, such as the construction of roads and aqueducts, and of sewers that could wash out the filth of the city into the Tiber. Moreover, they have so constructed also the roads which run throughout the country, by adding both cuts through hills and embankments across valleys, that their wagons can carry boat-loads; and the sewers, vaulted with close-fitting stones, have in some places left room enough even for wagons loaded with hay to pass through them.¹ And water is brought into the city through the aqueducts in such quantities that veritable rivers flow through the city and the sewers; and almost every house has cisterns, and service-pipes, and copious fountains—with which Marcus Agrippa concerned himself most, though he also adorned the city with