no slight expenditure of time and money, but it could not fail to add considerably to our present knowledge of ancient Chaldæa; it would do honour to any government that should support it, and still more to the archæologist who should conduct the inquiry to completion, laying down on his plan the smallest vestige remaining of any ancient detail, and allowing himself to be discouraged by none of the numerous disappointments and deceptions that he would be sure to encounter. Meanwhile it would be profitless to carry our readers into any discussion upon the topography of Babylon. In the absence of ascertained facts nothing could be more arbitrary and conjectural than the various theories that have been put forward as to the direction of the city walls and their extent. According to George Smith the only line of wall that can now be followed would give a town about eight English miles round. Now Diodorus says that what he calls the _Royal City_ was sixty stades, or within a few yards of seven miles, in circumference.[60] The difference between the two figures is very slight. “In shape the city appears to have been a square with one corner cut off, and the corners of the walls of the city may be said roughly to front the cardinal points. At the north of the city stood the temple of Belus, now represented by the mound of Babil; about the middle of the temple stood the royal palace and hanging-gardens.”[61] The _Royal City_ was the city properly speaking, the old city whose buildings were set closely about the great temple and the palace, the latter forming, like the _Old Seraglio_ at Constantinople, a fortified town in itself with a wall some twenty stades (4043 yards) in circumference. A second wall, measuring forty stades in total length, turned the palace and the part of the city in its immediate neighbourhood into a sort of acropolis. Perhaps the nobles and priests may have inhabited this part of the town, the common people being relegated to the third circle. In the towns of Asia Minor at the present day the Turks alone live in the fortified inclosures, which are called _kaleh_, or citadels, the rest of the town being occupied by the _rayahs_ of every kind, whether Greek or Armenian. There is, then, nothing in the description of Diodorus at which we need feel surprise. Our difficulty begins when we have to form a judgment upon the assertion of Herodotus, who speaks of an inclosure 120 stades (13 miles 1385 yards) square.[62] According to this the circumference of Babylon must have been nearly 55¼ English miles, which would make it considerably larger than what is called Greater London, and more than three times the size of Paris. Here, strangely enough, Ctesias gives a more moderate figure than Herodotus, as we find Diodorus estimating the circumference of the great _enceinte_ at 360 stades (41 miles 600 yards).[63]