Dr. Livingstone goes to mouth of Rovuma--His prayer--His company--His herd of animals--Loss of his buffaloes--Good spirits when setting put--Difficulties at Rovuma--Bad conduct of Johanna men--Dismissal of his Sepoys--Fresh horrors of slave-trade--Uninhabited tract--He reaches Lake Nyassa--Letter to his son Thomas--Disappointed hopes--His double aim, to teach natives and rouse horror of slave-trade--Tenor of religious addresses--Wikatami remains behind--Livingstone finds no altogether satisfactory station for commerce and missions--Question of the watershed--Was it worth the trouble?--Overruled for good to Africa--Opinion of Sir Bartle Frere--At Marenga's--The Johanna men leave in a body--Circulate rumor of his murder--Sir Roderick disbelieves it--Mr. E.D. Young sent out with Search Expedition--Finds proof against rumor--Livingstone half-starved--Loss of his goats--Review of 1866--Reflections on Divine Providence--Letter to Thomas--His dog drowned--Loss of his medicine-chest--He feels sentence of death passed on him--First sight of Lake Tanganyika--Detained at Chitimba's--Discovery of Lake Moero--Occupations during detention of 1867--Great privations and difficulties--Illness--Rebellion among his men--Discovery of Lake Bangweolo--Its oozy banks--Detention--Sufferings--He makes for Ujiji--Very severe illness in beginning of 1869--Reaches Ujiji--Finds his goods have been wasted and stolen--Most bitter disappointment--His medicines, etc., at Unyanyembe--Letter to Sultan of Zanzibar--Letters to Dr. Moffat and his daughter. CHAPTER XX. MANYUEMA. A.D. 1869-1871.