The frontiers of Turkish Kurdistan, from an ethnographical point of view, begin in the north at Ziven, on the Caucasian frontier, and continue westwards to Erzurum, Erzincan, Kemah, Arapgir, Besni and Divick (Divrik?); in the south they follow the line from Harran, Sinjar Mountains, Tel Asfar, Erbil, Süleymaniye, Akk-el-man, Sinne; in the east, Ravandiz, Başkale, Vezirkale, that is to say the frontier of Persia as far as Mount Ararat.