The only other city, in which direct evidence has been found of Ur-Engur's building activity, is Nippur. From the American excavations on that site we learn that he rebuilt E-kur, Enlil's great temple, and also that of Ninlil, his spouse. It was doubtless on the strength of his holding Nippur that he assumed the title of King of Sumer and Akkad. How far his authority was recognized in Akkad it is impossible to say, but the necessity for the conquest of Babylon in Dungi's reign would seem to imply that Ur-Engur's suzerainty over at least a part of the country was more or less nominal. Khashkhamer, patesi of Ishkun-Sin, whose seal is now preserved in the British Museum,[4] was his subject, and the Semitic character of the name of his city suggests that it lay in Northern Babylonia. Moreover, certain tablets drawn up in his reign are dated in "the year in which King Ur-Engur took his way from the lower to the upper country," a phrase that may possibly imply a military expedition in the north. Thus some portions of Akkad may have been effectively held by Ur-Engur, but it is certain that the complete subjugation of the country was only effected during Dungi's reign. In Sumer, on the other hand, Ur-Engur's sway was unquestioned. His appointment of Ur-abba as patesi of Lagash was probably characteristic of his treatment of the southern cities: by the substitution of his own adherents in place of the reigning patesis, he would have secured loyal support in the administration of his dependent states. We have evidence of one of his administrative acts, so far as Lagash is concerned. On a clay cone from Tello he records that, after he had built the temple of Enlil, he dug a canal in honour of the Moon-god, Nannar, which he named Nannar-gugal. He describes the canal as a boundary-ditch, and we may conjecture that it marked a revision of the frontier between the territories of two cities, possibly that between Lagash and lands belonging to the city of Ur. In the same inscription he tells us that, in accordance with the laws of the Sun-god, he caused justice to prevail, a claim that affords some indication of the spirit in which he governed the cities he had incorporated in his kingdom.