Passing round by the sea, he ascended the River Bengo to Icollo-i-Bengo, once the residence of a native king. While Mr Gabriel returned to Loanda, Dr Livingstone and his party proceeded to Golcongo Alto, where he left some of his men to rest, while he took an excursion to Kasenge, celebrated for its coffee plantations. On his return he found several of them suffering from fever, while one of them had gone out of his mind, but in a short time recovered. The doctor had the satisfaction of returning the kindness he received from Mr Canto, the commandant, by attending him during a severe attack of illness. He had thus an opportunity of watching the workings of slavery. The moment their master was ill, the slaves ate up everything on which they could lay their hands, till the doctor himself could scarcely obtain even bread and butter. Here Sekeletu's horse was seized with inflammation, and the poor animal afterwards died on its journey. On the 28th of February they reached the banks of the Quango, where they were again received by Cypriano. The coloured population of Angola are sunk in the grossest superstition. They fancy themselves completely in the power of spirits, and are constantly deprecating their wrath. A chief, named Gando, had lately been accused of witchcraft, and, being killed by the ordeal, his body was thrown into the river. Heavy payment was demanded by the ferrymen for crossing in their wretched canoes; but the cattle and donkeys had to swim across. Avoiding their friend with the comical head-dress, they made their way to the camp of some Ambakistas, or half-caste Portuguese, who had gone across to trade in wax. They are famed for their love of learning, and are keen traders, and, writing a peculiarly fine hand, are generally employed as clerks, sometimes being called the Jews of Angola. The travellers were now in the country of the Bashinji, possessing the lowest negro physiognomy. At a village where they halted, they were attacked by the head man, who had been struck by one of the Makololo on their previous visit, although atonement had been made. A large body of the natives now rushed upon them as they were passing through a forest, and began firing, the bullets passing amid the trees. Dr Livingstone fortunately encountered the chief, and, presenting a six-barrelled revolver, produced an instant revolution in his martial feelings. The doctor then, ordering, him and his people to sit down, rode off. They were now accompanied by their Portuguese friends, the Londa people, who inhabit the banks of the Loajima.