The river from this point is very beautiful and grand; noble and lofty hills flank it on both sides. Many hundred islands, with dense bush, add immensely to the beauty of the country. Between the Hygap and the South Atlantic Ocean there are four rivers that drain the South Kalahara, the Nisbit, Aamo, Keikab, and the Great Fish river; the three former rise on the south side of the Brinus mountain, the latter is a large and extensive tributary of the Orange, being over 400 miles in length, rising in Damaraland in 22 degrees 10 minutes South latitude, flowing south through the desert, receiving in its course, on the western bank, many branches that rise in the mountain region of Great Namaqualand, the most important being the Amhup, Koros, Huntop, Chun, Oip, and Manobis, and enters the Orange river about ninety miles from its mouth. The total length of the Orange to the Vaal, and up that river to Lake Cressie, is 1110 miles. There are several cataracts and rapids on both the Orange and the Vaal, with long stretches of smooth water. The most extensive cataract is Aukrabies, below Kakaman's drift, where there is a foil of nearly ninety feet. The ancient river system of the Kalahara desert, of which the Hygap is the outlet into the Orange, requires care to properly describe the peculiar formation of the several watercourses that intersect that extensive region, and from the magnitude of some of them show that at some remote period they were vast flowing rivers, whereas at the present time water is seldom seen in them. The upper or more northern fountains rise in Ovampoland, at an altitude of 3350 feet near the Omareru river, distant from the Orange river at the junction of the Hygap nearly 700 miles; 200 miles below the upper fountain of this river the elevation is 3200 feet; 130 miles to the south of this, at the junction of the Nosop river, the altitude is 2700 feet; and 160 miles following the course of the Nosop down south to the junction of the Molapo, along that river to the junction of the Kuruman river, the height is 2400 feet, which river receives the name of the Hygap; and 170 miles following that river due south to the junction of the Orange, the altitude is 1470 feet,--consequently there is a fall of 1880 feet from the fountains in Ovampoland to the Orange river. The Black and White Nosops join in the desert, forty miles to the east of Rhinoster vlei. They both rise on the eastern boundary of Damaraland, having many feeders from the mountain range 8000 feet above sea-level, flowing south and east to Narukus, where the Elephant river joins it, receiving its waters from the Limestone Peak, 4444 feet in altitude. Twenty miles below Narukus the river is called the Oup, which meanders in a south-east and south direction, and falls into the Molapo, twenty-four miles below the junction of that river and the Nosop. The distance of the upper springs of the Black and White Nosop to the Molapo is nearly 500 miles.