The Zouga, from the lake, winds easterly through a flat country for eighty miles, then turns south for 130 miles to Kumadua vlei, and then north-east for sixty miles, and joins the great Makarakara brak vlei, which is nearly fifty miles across, where five streams enter it on the eastern side from the watershed that passes through the Matabeleland, viz. the Nata, Quabela, Shuari, Mia, and Tua. The Zouga river having such a perfect level, the water in April and May flows easterly, in June and July westerly. The only outlet for the surplus water of the Zouga, lake, and vlei, is the Mababe into the Chobe; and when all are full, and no stream flowing, the water in the Mababe goes north or south according to the rain. If a great rush of water comes out of the lake or vlei, the Mababe is the outlet which connects the lake system with the Zambese, and the hippopotami find their way up from the latter river into the Zouga. The length of the Mababe from these two points is 200 miles, but there are several watercourses throughout this region, more particularly round the hilly district of Ngwa hills, traversing the country in all directions; pans and vleis intersect this extensive district, many of them extensive--the Sira and Etwetwe are considerable. The tributaries to the east of the Victoria Falls to the coast comprise the following:--Daka, Zimboya, Gwaii with its many branches, Sebuana, Lohala, Sinyaki, Lozenza, Banyeka, Panyama, Zingisi, Nake, Luenya, Landeen, Sankatsi, Zangwe; all of them take their rise in the watershed of the Molopo and Lobolo mountains. The principal known tributaries on the north of the Zambese are the Shire, which enters it ninety miles from the mouth--it is a broad and extensive river, being the outlet to the waters of the Lake Shirwa--the Kewubue, Loangwa, Kafue, Majecla, Luamba, and many intervening branches not yet sufficiently surveyed. This comprises the Zambese basin, the most valuable and important region in South Central Africa. THE LIMPOPO RIVER BASIN, COVERING AN AREA OF 620,000 SQUARE MILES. This river, from the fountain-head to its mouth, where it enters the Indian Ocean, eighty miles up the coast from Delagoa Bay, in 25 degrees 25 minutes South latitude, 33 degrees 30 minutes East longitude, is 850 miles in length. Its configuration is nearly three parts of a circle. The chief fountains rise south of Pretoria in the Transvaal, on the watershed between Potchefstroom and Pretoria, 26 degrees 10 minutes South latitude, 28 degrees 40 minutes East longitude, taking a north-north-west course for 200 miles, then turns north-east, and then easterly for 400 miles, and then in a south-south-east direction for 250 miles over a flat country to the ocean.