1200, however, the Arabian geographers mention a tributary, the Tharthar, navigable in flood time, which flowed from the Jaghigagh branch of the Khabur, a tributary of the Euphrates, to the Tigris.
Or less from the Tigris until, south of the Sinjar range, it lies farther west, and the Tharthar river is possible.
The Tharthar (Assyrian Tartar, in Tukulti-Ninib II.'s inscription) begins in the Sinjar range and runs southwards, to lose itself in the desert a little above the latitude of Hit.
The Arabian geographers represent the Tharthar as connected at its upper end (by a canal?) with the Khabur system.
Established more direct relations between Mesopotamia and Babylon, his work was presently undone by the vigorous campaigns of Tiglath-pileser I., who seems to have even won Egypt's sanction of his succession to the Hittite claims. The newly recovered (1909) tablet of Tukulti-Ninib, the grandfather of Shalmaneser II., is interesting from its account of an expedition down the course of the Tharthar to Hit = Id (river and town now first mentioned in cuneiform sources) and up the Euphrates to the Khabur district.