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.
Hitherto there has been no great difficulty in determining the order of the monumental kings, from the position of their bricks in the principal Chaldaean ruins and the general character of their inscriptions.