North of Moamba, on the Merenge, the slope begins to Liemba. The Lofu rises in Chibue's country, and with its tributaries we have long ridges of denudation, each some 500 or 600 feet high, and covered with green trees. The valleys of denudation enclosed by these hill ranges guide the streams towards Liemba or the four rivers which flow into it. The country gradually becomes lower, warmer, and tsetse and mosquitoes appear; so at last we come to the remarkable cup-shaped cavity in which Liemba reposes. Several streams fall down the nearly perpendicular cliffs, and form beautiful cascades. The lines of denudation are continued, one range rising behind another as far as the eye can reach to the north and east of Liemba, and probably the slope continues away down to Tanganyika. The watershed extends westwards to beyond Casembe, and the Luapula, or Chambeze, rises in the same parallels of latitude as does the Lofu and the Lonzna. The Arabs inform me that between this and the sea, about 200 miles distant, lies the country of the Wasango--called: Usango--a fair people, like Portuguese, and very friendly to strangers. The Wasango possess plenty of cattle: their chief is called Merere.[53] They count this twenty-five days, while the distance thence to the sea at Bagamoio is one month and twenty-five days--say 440 miles. Uchere is very far off northwards, but a man told me that he went to a salt-manufactory in that direction in eight days from Kasonso's. Merere goes frequently on marauding expeditions for cattle, and is instigated thereto by his mother. What we understand by primeval forest is but seldom seen in the interior here, though the country cannot be described otherwise than as generally covered with interminable forests. Insects kill or dwarf some trees, and men maim others for the sake of the bark-cloth; elephants break down a great number, and it is only here and there that gigantic specimens are seen: they may be expected in shut-in valleys among mountains, but on the whole the trees are scraggy, and the varieties not great. The different sorts of birds which sing among the branches seem to me to exceed those of the Zambesi region, but I do not shoot them: the number of new notes I hear astonishes me. The country in which we now are is called by the Arabs and natives Ulungu, that farther north-west is named Marunga. Hamees is on friendly terms with the Mazitu (Watuta) in the east, who do not plunder. The chief sent a man to Kasonso lately, and he having received a present went away highly pleased.