The Hebrus, together with its tributaries which flow into it from the north, east and west, drains almost the whole of Thrace.
Like the Kunduz, it probably drains the northern slopes of the Hindu Kush by deep lateral valleys, more or less parallel to the crest, reaching westwards towards the Khawak pass.
Hence it may be considered to terminate where the Rio Cojedes, which drains the elevated valley in which Barquisimeto stands, after rising on its western slopes flows eastwards into the basin of the Orinoco.
Some miles lower down, at Leitmeritz (433 ft.), the waters of the Elbe are tinted by the reddish Eger, a stream which drains the southern slopes of the Erzgebirge.
The town lies pleasantly upon a hill rising above a mere, which drains to the Waveney, having its banks laid out as public gardens.
