SUDAN. Kordofan. The Nubas. In the Korongo jebels (hills) the Nuba tribesmen own herds of cattle which graze in the lower-lying valleys. The image shows the method of watering the herd. As there are no open streams, troughs are made out of sun-baked clay and filled from gourds carried from the well by a bevy of small boys. When the troughs are full, the cattle are driven in to drink. 1949.