Of the names Sumer and Akkad, it would seem that neither was in use in the earliest historical periods, though the former was probably the older of the two. At a comparatively early date the southern district as a whole was referred to simply as "the Land,"[23] _par excellence_, and it is probable that the ideogram by which the name of Sumer was expressed, was originally used with a similar meaning.[24] The twin title, Sumer and Akkad, was first regularly employed as a designation for the whole country by the kings of Ur, who united the two halves of the land into a single empire, and called themselves kings of Sumer and Akkad. The earlier Semitic kings of Agade or Akkad[25] expressed the extent of their empire by claiming to rule "the four quarters (of the world)," while the still earlier king Lugal-zaggisi, in virtue of his authority in Sumer, adopted the title "King of the Land." In the time of the early city-states, before the period of Eannatum, no general title for the whole of Sumer or of Akkad is met with in the inscriptions that have been recovered. Each city with its surrounding territory formed a compact state in itself, and fought with its neighbours for local power and precedence. At this time the names of the cities occur by themselves in the titles of their rulers, and it was only after several of them had been welded into a single state that the need was felt for a more general name or designation. Thus, to speak of Akkad, and even perhaps of Sumer, in the earliest period, is to be guilty of an anachronism, but it is a pardonable one. The names may be employed as convenient geographical terms, as, for instance, when referring to the country as a whole, we speak of Babylonia during all periods of its history. [1] For a discussion of the conflicting evidence with regard to the occurrence of bronze at this period, see below, pp. 72 ff. [2] The controversy has now an historical rather than a practical importance. Its earlier history is admirably summarized by Weissbach in "Die sumerische Frage," Leipzig, 1898; cf. also Fossey, "Manuel d'Assyriologie," tome I, (1904), pp. 269 ff. M. Halévy himself continues courageously to defend his position in the pages of the "Revue Sémitique," but his followers have deserted him. [3] The origin of the Great Swamp, or Swamps, called by Arab geographers al-Baṭiḥa, or in the plural al-Baṭâyiḥ, is traced by Bilâdhuri to the reign of the Persian king Kubâdh I., towards the end of the fifth century B.C. Ibn Serapion applies the name in the singular to four great stretches of water (_Hawrs_), connected by channels through the reeds, which began at El-Kaṭr, near the junction of the Shatt el-Hai with the present bed of the Euphrates. But from this point as far northwards as Niffer and Kûfa the waters of the Euphrates lost themselves in reed-beds and marshes; cf. G. le Strange, "Journ. Roy. Asiat. Soc.," 1905, p. 297 f., and "Lands of the Eastern Caliphate," p. 26 f.