The river enters South-West Africa along a deep channel and winds its sinuous way like a giant snake between towering precipices and overhanging mountains grey with age along cañons reminiscent of Colorado. In some of the deep, rocky gorges the stream is inaccessible on either side, since the overhanging escarpments of the surrounding plateau rise sheer from the water many hundreds of feet, and a thirsty traveller might actually perish of thirst as he looked down upon the tantalising waters from the precipitous banks that offered not a single practicable way of descent. At intervals the stream broadens to a considerable distance and takes on the appearance of a quiet lake reflecting the image of the willow and mimosa trees that fringe its banks; islands of vivid green dot the waters; flamingos, ibises, and other wading birds, move leisurely in the shallows, while ever and anon birds of brilliant plumage dart across the surface. It then presents a picture of considerable charm. Barred in its approach to the sea by rocky hills and granite cliffs, in its eager efforts to find the line of least resistance, the river twists and turns, flowing now north, now south, and in one place actually doubling back to the east. On emerging from the mountain ranges it sprawls itself over a wide area as if reluctant to lose its greatness in the ocean. Its mouth is generally blocked for a number of years by a continuous narrow sand barrier formed by the big breakers of the Atlantic, and while the waves pound the sand with great fierceness on the one side, the cool, fresh waters of the river gently lap it on the other side. When the river comes down in strong flood the dam bursts with a crash and a roar heard many miles distant. Mr. A. D. Lewis, a Government engineer, visited the mouth at the end of 1912, having made a survey journey along the river valley from Pella to the Atlantic. He is actually the first scientifically trained individual to make the journey. His report,[3] together with plans and reproductions of photographs, is of absorbing interest. THE RIVERS