Between Tekrit and Baghdad there is much to interest the traveller who for the first time floats down a river winding through the great alluvial plains of Chaldæa. The country has, however, been so frequently described[187], that I will not detain the reader with more than a general sketch of it. Our rafts glided noiselessly onwards, without furrowing with a ripple the quiet surface of the stream. Leaving Tekrit, we first passed a small whitewashed Mussulman tomb, rising on the left or eastern bank, in a plain that still bears the name of Dura. It was here, as some believe, that "Nebuchadnezzar the king made an image of gold, whose height was threescore cubits and breadth six cubits, and called together the princes, the governors, and the captains, the judges, the treasurers, the counsellors, the sheriffs, and all the rulers of the provinces to its dedication, and that certain Jews would not serve his gods, nor fall down and worship the golden image that he had set up."[188] It is now a wilderness, with here end there a shapeless mound, the remains of some ancient habitation. The place is not otherwise unknown to history, for it was here that, after the death of the Emperor Julian, his successor Jovian concluded a disgraceful peace with the Persian king Sapores (Shapour), and saved the Roman army by yielding to the enemy the five great provinces to the east of the Tigris. It was here, too, that he crossed the Tigris, a broad and deep stream, and commenced his disastrous retreat through Mesopotamia. Not far below, and on the same side of the river, the great canal of the Naharwan, the wonder of Arab geographers, robbed the Tigris of a large portion of its waters. Below the Naharwan, ruins, walls, and dwellings, built chiefly of large pebbles, united by a strong cement, a mode of construction peculiar to the Sassanian and early Arab periods, stand on the alluvial cliffs. They are called Eski, or old, Baghdad; the Arabs, as usual, assigning a more ancient site to the modern city. A tower, about two hundred feet high, now rises above the eastern bank of the river. An ascending way winds round it on the outside like the spiral of a screw, reminding the traveller of the common ideal pictures of the Tower of Babel. It marks the site of the ancient city of Samarrah, where the Roman army under Jovian rested after marching and fighting a long summer's day. It subsequently became the capital of Motassem Billah, the eighth caliph of the Abbasside dynasty. Weary of the frequent seditions of the turbulent inhabitants of Baghdad, he resolved to change the seat of government, and chose Samarrah as his residence. If he did not build, he beautified, the city, and displayed in it great magnificence. The modern town, inhabited by Arabs, consists of a few falling houses surrounded by a mud wall, defended by bastions and towers.