Other evidence is not lacking of the Sumerian national revival, which characterized the period of the kings of Sumer and Akkad. Of Ur-Engur's inscriptions every one is written in Sumerian, in striking contrast to the texts which date from the time of Shar-Gani-sharri and Narâm-Sin. Of the still more numerous records of Dungi's reign, only two short votive formulæ are written in Semitic Babylonian, and one of these is from the northern city of Cutha. The predominant use of Sumerian also characterizes the texts of the remaining members of Ur-Engur's dynasty and the few inscriptions of the Dynasty of Isin that have been recovered.[6] In fact, only one of these is in Semitic, a short brick-inscription giving the name and titles of Gimil-Sin, which was found at Susa. It is true that the last three kings of the Dynasty of Ur apparently bear Semitic names, and of the rulers of the Dynasty of Isin the Semitic character of the majority of the names is not in doubt. But this in itself does not prove that their bearers were Semites, and a study of the proper names occurring in the numerous commercial documents and tablets of accounts, which were drawn up under the kings of Ur and Isin, are invariably Sumerian in character.[7] A more convincing test than that of the royal names is afforded by the cylinder-seals of the period. In these both subject and treatment are Sumerian, resembling the seals of Lagash at the time of Gudea and having little in common with those of the Dynasty of Akkad. Moreover, the worshippers engraved upon the seals are Sumerians, not Semites. Two striking examples are the seal of Khashkhamer, the contemporary and dependant of Ur-Engur, and that which Kilulla-guzala,[8] the son of Ur-baga, dedicated to Meslamtaea for the preservation of Dungi's life.[9] It will be noticed that on each of these seals the worshipper has a shaven head and wears the fringed Sumerian tunic. There can be little doubt, therefore, that Ur-Engur and his descendants were Sumerians, and we may probably regard the Dynasty of Isin as a continuation of the same racial movement which led to the establishment of the kingdom of Sumer and Akkad.[10]