That Lugal-kigub-nidudu and Lugal-kisalsi are in any case to be set before the time of Shar-Gani-sharri of Akkad is proved by the fact that one of the rough blocks of diorite, which the former had dedicated to Enlil after inscribing his name upon it, was afterwards used by Shar-Gani-sharri as a door-socket in the temple he erected at Nippur.[11] Whether they lived still earlier than Lugal-zaggisi it is difficult to decide. The longest inscription of Lugal-kigub-nidudu which has been recovered is engraved upon a vase which he deposited as a votive offering in Enlil's temple, and from the introductory phrases preceding the dedication it would appear that he founded a kingdom, or at any rate enlarged one which he already possessed. "When Enlil, the king of the lands," the passage runs, "(had spoken) to Lugal-kigub-nidudu and had addressed a favourable word to him, and had united the dominion with the kingdom, of Erech he made a dominion, of Ur he made a kingdom."[12] It would thus seem that Lugal-kigub-nidudu had at first been possessed of only one of the two cities, Erech or Ur, and that he subsequently acquired the other, probably by conquest, and proceeded to rule them both under separate administrations. Too much emphasis is not to be set on the fact that he describes his rule of Erech as a lordship or a dominion, while he styles that of Ur a kingdom; for the difference in these phrases was not very marked in the pre-Sargonic period, and it is to be noted that Erech is mentioned before Ur. Moreover, Lugal-kisalsi assigns the title "King of Erech" as well as "King of Ur" to his predecessor as to himself, and, since he places the former title first, it is probable that Erech and not Ur was their capital. But even on this assumption it does not follow that Erech was Lugal-kigub-nidudu's native city, for we have seen that when Lugal-zaggisi conquered Sumer he transferred his capital to Erech, and Lugal-kigub-nidudu may have done the same. The fact that at a later period Gudea, when rebuilding the temple E-ninnû, came across a stele of Lugal-kisalsi[13] suggests that he exercised authority over Lagash; and we may probably conclude that both he and Lugal-kigub-nidudu included the principal cities of Southern Babylonia under their sway. That Lugal-kisalsi followed and did not precede Lugal-kigub-nidudu upon the dual throne of Erech and Ur is certain from one of his votive inscriptions,[14] which contains a reference to the earlier king. The beginning of the text is wanting, so that it is not clear whether he mentions him as his father or in some other connection. In any case we may assume that he followed him at no long interval; but it is not yet certain whether we are to set their reigns in Sumer before or after that of Lugal-zaggisi.