The Hari-Rud marks the only important break existing in the continuity of the great central water-parting of Asia.
MESHED (properly Mash-had, " the place of martyrdom"), capital of the province of Khorasan in Persia, situated in a plain watered by the Kashaf-rud (Tortoise river), a tributary of the Hari-rud (river from Herat, which after its junction with the Kashaf is called Tejen), 460 m.
That one is afforded by the narrow valley of the Hari Rud to the west of Herat.
From the Caspian to Karachi it is possible to pass without encountering any orographic obstacle greater than the divide which separates the valley of the Hari Rud from the Helmund hamun basin, which may be represented by an altitude of about 4000 ft.
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