Cataracts of the Kalongosi. Passage of the river disputed. Leeches and method of detaching them. Syde bin Habib's slaves escape. Enormous collection of tusks. III. Theory of the Nile sources. Tribute to Miss Tinne. Notes on climate. Separation of Lake Nyassa from the Nile system. Observations on Victoria Nyanza. Slaves dying. Repentant deserters. Mohamad Bogharib. Enraged Imbozhwa. An attack. Narrow escape. Renewed attack. A parley. Help arrives. Bin Juma. March from the Imbozhwa country. Slaves escape. Burial of Syde bin Habib's brother. Singular custom. An elephant killed. Native game-laws. Rumour of Baker's Expedition. Christmas dinners. _11th October, 1868._--From Kizinga north the country is all covered with forest, and thrown up into ridges of hardened sandstone, capped occasionally with fine-grained clay schist. Trees often appear of large size and of a species closely resembling the gum-copal tree; on the heights masukos and rhododendrons are found, and when exposed they are bent away from the south-east. Animals, as buffaloes and elephants, are plentiful, but wild. Rivulets numerous, and running now as briskly as brooks do after much rain in England. All on the south-western side of Kalongosi are subjects of Casembe, that is Balunda, or Imbozhwa. It was gratifying to see the Banyamwezi carrying their sick in cots slung between two men: in the course of time they tired of this, and one man, who was carried several days, remained with Chuma. We crossed the Luongo far above where we first became acquainted with it, and near its source in Urungu or Usungu Hills, then the Lobubu, a goodly stream thirty yards broad and rapid with fine falls above our ford, which goes into Kalongosi. _6th October, 1868._--Cross the Papusi, and a mile beyond the Luena of forty yards and knee deep; here we were met by about 400 of Kabanda's men, as if they were come to dispute our passage at the ford: I went over; all were civil; but had we shown any weakness they would no doubt have taken advantage of it. _7th October, 1868._--We came to the Kalongosi, flowing over five cataracts made by five islets in a place called Kabwerume. Near the Mebamba a goodly rivulet joins it.