On the high lands at the northern end, a tribe of Zulus, known as the Mazitu, make sudden swoops on the villages of the plains, and carry off the inhabitants and burn villages; and putrid bodies slain by Mazitu spears were seen in all directions. In consequence of this the land party, composed of blacks, were afraid of proceeding, and Dr Livingstone accordingly landed to accompany them. While he struck inland to go round a mountain, the boat pursued her course; but a fresh gale compelled her to run in-shore. On continuing her voyage, a number of armed Mazitu were seen on a small island, with several large canoes belonging to them. It was evident that it was a nest of lake pirates. Further on they met a still larger band, and the voyagers were ordered to come on shore. On refusing, a number of canoes chased them, one with nine paddlers persevering a considerable time, till a good breeze enabled the gig to get away from them. This circumstance caused great anxiety about Dr Livingstone. The boat party having sailed on for fifteen miles northward, he was still nowhere to be seen, and they therefore resolved to return. Another gale, however, compelled them to put into a harbour, where a number of wretched fugitives from the slave trade, who had crossed from the opposite shore, were found; but the ordinary inhabitants had been swept off by the Mazitu. In their deserted gardens cotton of a fine quality, with staple an inch and a half long, was seen growing, some of the plants deserving to be ranked with trees. On returning, their former pursuers tried to induce them to come on shore. Four days passed before Dr Livingstone with two of his party discovered them. He had in the mean time fallen in with the Mazitu, who were armed with spears and shields, and their heads fantastically dressed with feathers. By his usual courage and determination he prevented them from attacking him. When they demanded presents, he told them his goods were in the boat; and when they insisted on having a coat, the Makololo enquired how many of the party they had killed, that they thus began to divide the spoil; and at last, suspecting that he had support at hand, they took to their heels. Numerous elephants, surprisingly tame, were seen on the borders of the lake even close to the villages, and hippopotami swarmed in all the creeks and lagoons. Several were shot for food during the journey. Sometimes food was thus abundant; at others, a few sardines served for dinner. The slave trade on the lake was being pursued with fearful activity. A dhow had been built by two Arabs, who were running her regularly, crowded with slaves, across its waters. Part of the captives are carried to the Portuguese slave-exporting town of Iboe, while others go to Kilwa. The chiefs showed but little inclination to trade, their traffic being chiefly in human chattels.