The Evolution of the Biver System of Griqualand West. 351 
Another line of drainage starts a little to the east of Kimberley, 
extending in a south-westerly direction ; in its lower reaches it almost 
coincides with the Orange Eiver just above the junction of the latter with 
the Vaal. South-westwards from Belmont past Hopetown and down to 
Fig. 1. 
Beer Vlei an important feeder can be traced, traversing an area of little 
relief, but nevertheless possessing a rather intricate drainage system. 
West of the Doornberg some of the rainfall certainly flowed in a. 
southerly direction. 
