To the fourth Berosian dynasty, which held the throne for 458 years, from about B. C. 2004 to B. C. 1546, the monuments enable us to assign some eight or ten monarchs, whose inscriptions are characterized by a general resemblance, and by a character intermediate between the extreme rudeness of the more ancient and the comparative elegance and neatness of the later legends. Of these kings one of the earliest was a certain Ismidagon, the date of whose reign we are able to fix with a near approach to exactness. Sennacherib, in a rock inscription at Bavian, relates that in his tenth year (which was B. C. 692) he recovered from Babylon certain images of the gods which had been carried thither by Merodach-iddin-akhi, King of Babylon, after his defeat of Tiglath-Pileser, King of Assyria, 418 years previously. And the same Tiglath-Pileser relates that he rebuilt a temple in Assyria, which had been taken down 60 years before, after it had lasted 641 years from its foundation by Shamas-Vul, sun of Ismi-dagon. It results from these numbers that Ismi-dagon was king as early as B.C. 1850, or, probably a little earlier. The monuments furnish little information concerning Ismidagon beyond the evidence which they afford of the extension of this king’s dominion into the upper part of the Mesopotamian valley, and especially into the country known in later times as Assyria. The fact that Shamas-Vul, the son of Ismi-dagon, built a temple at Kileh-Sherghat, implies necessarily that the Chaldaans at this time bore sway in the upper region. Shamas-Vul appears to have been, not the eldest, but the second son of the monarch, and must be viewed as ruling over Assyria in the capacity of viceroy, either for his father or his brother. Such evidence as we possess of the condition of Assyria about this period seems to show that it was weak and insignificant, administered ordinarily by Babylonian satraps or governors, whose office was one of no great rank or dignity. In Chaldaea, Ismi-dagon was succeeded by a son, whose name is read, somewhat doubtfully, as Gunguna or Gurguna. This prince is known to us especially as the builder of the great public cemeteries which now form the most conspicuous objects among the ruins of Mugheir, and the construction of which is so remarkable. Ismi-dagon and his son must have occupied the Chaldaean throne during most of the latter half of the nineteenth century before our era-from about B.C. 1850 to B.C. 1800.