But, whether Akurgal was Ur-Ninâ's eldest son or not, the evidence of at least the smaller of the two complete plaques would seem to show that he was recognized as crown-prince during the lifetime of his father, and we may infer that he was Ur-Ninâ's immediate successor. For an estimate of his reign we must depend on references made to him by his two sons. It has already been mentioned that the early part of the text engraved upon the Stele of the Vultures appears to have given an account of the relations between Lagash and Umma during the reigns preceding that of Eannatum,[51] and in a badly preserved passage in the second column we find a reference to Akurgal, the son of Ur-Ninâ. The context is broken, but "the men of Umma" and "the city of Lagash" are mentioned almost immediately before the name of Akurgal,[52] and it would appear that Eannatum here refers to a conflict which took place between the two cities during the former's reign. It should be noted that upon his Cone[53] Entemena makes no mention of any war at this period, and, as in the case of Ur-Ninâ's reign, his silence might be interpreted as an indication of unbroken peace. But the narratives may be reconciled on the supposition either that the conflict in the reign of Akurgal was of no great importance, or that it did not concern the fertile plain of Gu-edin. It must be remembered that the text upon the Cone of Entemena was composed after the stirring times of Eannatum, Entemena's uncle, and the successes won by that monarch against Umma were naturally of far greater importance in his eyes than the lesser conflicts of his predecessors. It is true that he describes the still earlier intervention of Mesilim in the affairs of Lagash and Umma, but this is because the actual stele or boundary-stone set up by Mesilim was removed by the men of Umma in Eannatum's reign, an act which provoked the war. The story of Mesilim's intervention, which resulted in the setting up of the boundary-stone, thus forms a natural introduction to the record of Eannatum's campaign; and the fact that these two events closely follow one another in Entemena's text is not inconsistent with a less important conflict being recorded by the Stele of the Vultures as having taken place in the reign of Akurgal.