Before it receives the Voronezh the Don has a breadth of 500 to 700, or even in a few places loon ft., while its depth varies from 4 to 20 ft.; by the time it reaches its most eastern point the depth has increased to 8-50 ft., and the ordinary breadth to 700 -1000 ft., with an occasional maximum of 1400 ft.; in the lowest division the depth is frequently 70 ft., and the breadth in many places 1870 ft.
Its width is very uniform for loon m.
There is evidence, however, that so early as loon B.C. an export trade existed to the Red Sea by way of East Africa, and before 750 B.C. a similar trade had sprung up with Babylon by way of the Persian Gulf.
From East London the railway rises loon ft.; at Kei Road, 46 m.