The road from Baghdad to Hillah crosses, near the village of Mohawill, a wide and deep canal still carrying water to distant gardens. On the southern bank of this artificial stream is a line of earthen ramparts, which are generally believed to be the most northern remains of the ancient city of Babylon. From their summit the traveller scans a boundless plain, through which winds the Euphrates, with its dark belt of evergreen palms. Rising in the distance, high above all surrounding objects, is the one square mound, in form and size more like a natural hill than the work of men’s hands. This is the first great ruin to the east of the river, and the Arab, as I have said, names it “Babel.”

The traveller, before reaching this ruin, still about four miles distant, follows a beaten track winding amidst low mounds, and crossing the embankments of canals long since dry, or avoiding the heaps of drifted earth which cover the walls and foundations of buildings. Some have here traced the lines of the streets, and the divisions between the inhabited quarters of ancient Babylon. As yet no traces whatever have been discovered of that great wall of earth rising, according to Herodotus, to the height of 200 royal cubits, and no less than fifty cubits broad; nor of the ditch that encompassed it. The mounds seem to be scattered without order, and to be gradually lost in the vast plains to the eastward.

But southward of Babel, for the distance of nearly three miles, there is almost an uninterrupted line of mounds, the ruins of vast edifices, collected together as in the heart of a great city. They are inclosed by earthen ramparts, the remains of a line of walls which, leaving the foot of Babel, stretched inland about two miles and a half from the present bed of the Euphrates, and then turning nearly at right angles completed the defences on the southern side of the principal buildings that mark the site of Babylon, on the eastern bank of the river. Between its most southern point and Hillah, as between Mohawill and Babel, can only be traced low heaps and embankments, scattered irregularly over the plain.

It is evident that the space inclosed within this continuous rampart, could not have contained the whole of that mighty city, whose magnificence and extent were the wonder of the ancient world. The walls of Babylon, according to Herodotus, measured 120 stadia on each side, and formed a perfect square of 480 stadia, or nearly sixty miles. Several later writers have repeated his statement. Strabo and Diodorus Siculus have however reduced the circuit of the city to 385 and 360 stadia; and such, according to Clitarchus, were its dimensions when it yielded to Alexander.

The existing remains within the rampart agree as little in form as in size with the descriptions of Babylon; for the city was a perfect square. Mr. Rich, in order to explain these difficulties, was the first to suggest that the vast ruin to the west of the Euphrates, called the Birs Nimroud, should be included within the limits of Babylon. There is no doubt that, by imagining a square large enough to include the smaller mounds scattered over the plains from Mohawill to below Hillah on one side of the river, and the Birs Nimroud at its south-western angle on the other, the site of a city of the dimensions attributed to Babylon might be satisfactorily determined. But then it must be assumed, that neither the outer wall nor the ditch so minutely described by Herodotus ever existed.

According to the united testimony of ancient authors, the city was divided by the Euphrates into two parts. The principal existing ruins are to the east side of the river; there are very few remains to the west, between Hillah and the Birs Nimroud. Indeed, in some parts of the plain, there are none at all. This fact might, to a certain extent, be explained in the following manner. To this day the Euphrates has a tendency to change its course and to lose itself in marshes to the west of its actual bed. We find that the low country on that side was subject to continual inundations from the earliest periods, and that, according to a tradition, Semiramis built embankments to restrain the river.

The changes in its course to which the Euphrates was thus liable, appear only to have taken place to the west of its present bed. After the most careful examination of the country, I could find no traces whatever of its having at any time flowed much further than it now does to the east, although during unusual floods it occasionally spreads over the plain on that side. The great mounds still rising on the eastern bank prove this. Supposing, therefore, the river from different causes to have advanced and receded during many centuries, between the Hindiyah marshes and its present channel, it will easily be understood how the ruins, which may once have stood on the western bank, have gradually been washed away, and how the existing flat alluvial plain has taken their place. In this manner the complete disappearance of the principal part of the western division of the city may, I think, be accounted for.

It is more difficult to explain the total absence of all traces of the external wall and ditch so fully and minutely described by Herodotus and other ancient writers, and, according to their concurrent accounts, of such enormous dimensions. If a vast line of fortifications, with its gates, and equidistant towers, all of stupendous height and thickness, did once exist, it is scarcely to be believed that no part whatever of it should now remain. Darius and other conquerors, it is true, are said to have pulled down and destroyed these defences; but it is surely impossible that any human labor could have obliterated their very traces. Even supposing that the ruins around Hillah do not represent the site of ancient Babylon, there are no remains elsewhere in Mesopotamia to correspond with those great ramparts. If there had been, they could not have escaped the researches of modern travellers.

But Herodotus states that, in the midst of each division of the city, there was a circular space surrounded by a lofty wall: one contained the royal palace; the other, the temple of Belus. There can be little difficulty in admitting that the mounds within the earthen rampart on the eastern bank of the river might represent the first of these fortified inclosures, which we know to have been on that side of the Euphrates. It is not impossible, as Rich has suggested, that the Birs Nimroud—around which—as it will be seen—there are still the traces of a regular wall, may be the remains of the second; or that the gradual changes in the course of the river just described, may have completely destroyed all traces of it.

It may be inferred, I think, from the descriptions of Herodotus and Diodorus Siculus, that Babylon was built on the same general plan as Nineveh. It must not be forgotten, also, that the outer walls of Nineveh as well as those of Babylon have entirely disappeared. Are we to suppose that the historians in their descriptions confounded them with those surrounding the temples and palaces; and that these exterior fortifications were mere ramparts of mud and brushwood, such as are still raised round modern Eastern cities? Such defences, when once neglected, would soon fall to dust, and leave no traces behind. I confess that I can see no other way of accounting for the entire disappearance of these exterior walls.[197]