North of the Danube, the dava-zone is largely consistent with Ptolemy's definition of Dacia's borders (III.8.1–3) i.e. the area contained by the river "Ister" (Danube) to the south, the river "Thibiscum" (Timiș) to the west, the upper river "Tyras" (Dniester) to the north and the river "Hierasus" (Siret) to the east. To the west, it appears that the "-dava" placenames in Olteanu's map lie within the line of the Timiş, extended northwards. However, four davas are located beyond the Siret, Ptolemy's eastern border. But three of these, "Piroboridava", "Tamasidava" and "Zargidava", are described by Ptolemy as "pará" (Gr."very close") to the Siret: "Piroboridava", the only one securely located, was 3 km from the Siret. The location of "Clepidava" is uncertain: Olteanu locates it in north-east Bessarabia, but Georgiev places it further west, in south-west Ukraine, between the upper reaches of the Siret and Dniester rivers.