A second trip up it was made in March of the same year. They here gained the friendship of Chibisa, a shrewd and intelligent chief, whose village was about ten miles below the cataracts. He told the doctor that a few years before his little daughter had been kidnapped, and was now a slave to the _padre_ at Tete, asking him, if possible, to ransom the child. From hence Dr Livingstone and Dr Kirk proceeded on foot in a northerly direction to Lake Shirwa. The natives turned out from their villages, sounding notes of defiance on their drums; but the efforts to persuade them that their visitors came as friends were successful, and the lake was discovered on the 18th of April. From having no outlet, the water is brackish, with hilly islands rising out of it. The country around appeared very beautiful and clothed with rich vegetation, with lofty mountains eight thousand feet high near the eastern shore. On their return they found Quartermaster Walker, who had charge of the steamer, dangerously ill, though he ultimately recovered. They returned to Tete on the 23rd of June, and thence, after the steamer had been repaired, proceeded to the Kongone, where they received provisions from HMS "Persian," which also took on board their Krumen, as they were found useless for land journeys. In their stead a crew was picked out from the Makololo, who soon learned to work the ship, and who, besides being good travellers, could cut wood and required only native food. Frequent showers fell on their return voyage up the Zambesi, and, the vessel being leaky, the cabin was constantly flooded, both from above and below. They were visited on their way up by Paul, a relative of the rebel Mariano, who had just returned from Mozambique. He told them that the Portuguese knew nothing of the Kongone before they had discovered it, always supposing that the Zambesi entered the sea at Quillimane. A second trip up the Shire was performed in the middle of August, when the two doctors set out in search of Lake Nyassa, about which they had heard. The river, though narrow, is deeper than the Zambesi, and more easily navigated. Marks of large game were seen, and one of the Makololo, who had gone on shore to cut wood, was suddenly charged at by a solitary buffalo. He took to flight, pursued by the maddened animal, and was scarcely six feet before the creature when he reached the bank and sprang into the river. On both banks a number of hippopotamus-traps were seen.