Although much of the country he had passed over was already known, no previous African traveller more successfully encountered and overcame the difficulties and dangers of a journey through that region. The most important result of his adventurous journey was the discovery of a large river, hitherto unknown, falling into the Chad from the south, and of the still larger affluent of the Quorra, the mighty Binue, which, rising in the far-off centre of the continent, flows through the province of Adamawa. The courage and perseverance of Dr Barth, while for five years travelling many thousand miles, amidst hostile and savage tribes, in an enervating climate, frequently with unwholesome or insufficient food, having ever to keep his energies on the stretch to guard himself from the attacks of open foes or the treachery of pretended friends, have gained for him the admiration of all who read his travels, and place him among the first of African travellers. CHAPTER THIRTEEN. CAPTAIN SPEKE'S DISCOVERIES OF THE SOURCE OF THE NILE. SPEKE'S PREVIOUS CAREER--JOINS AN EXPEDITION TO THE SOMALI COUNTRY--THE SOMALI--ARRIVE AT BERBERA--ATTACKED BY ROBBERS--HIS ESCAPE AND RETURN TO ADEN, AND FINALLY TO ENGLAND--JOINS CAPTAIN BURTON IN AN EXPEDITION TO THE MOUNTAINS OF THE MOON--SETS OUT FOR BOMBAY, AND AFTERWARDS TO ZANZIBAR--ENGAGE SHEIKH SAID AND THEIR ESCORT--CROSS TO KAOLE--ARRIVE AT CAZE, AND RECEIVED BY THE ARAB MERCHANTS--PORTERS DESERT--ILLNESS OF CAPTAIN BURTON, AND CARRIED TO ZIMBILI--SETS OUT WITH FRESH PORTERS--A SIGHT OF THE TANGANYIKA LAKE--THE MOUNTAINS OF THE MOON--NEARLY BLIND-- UP THE LAKE TO UJIJI--ARRIVE AT KAWELE--THEIR JOURNEY ON THE LAKE CONTINUED--AN ALARM--CAMP AT NIGHT--SHELLS--A STORM--ARRIVE AT SULTAN CASANGA'S TERRITORY--THE PEOPLE--ARRIVE AT THE FISH MARKET OF KABIZIA--A SINGA--CROSS TO KASENGE--RECEPTION--THE CHIEF DESCRIBED--THE RESULTS OF SLAVERY--HEARS OF A LARGE RIVER--CANNOT OBTAIN A BOAT--RETURNS TO UJIJI--SETS OUT TO EXPLORE A RIVER THAT FALLS INTO THE LAKE--TRICKS OF THE PADDLERS--RETURNS TO UJIJI--HELP ARRIVES--RETURNS TO CAZE--SETS OUT TO EXPLORE THE COUNTRY IN THE NEIGHBOURHOOD OF THE NYANZA LAKE--TRICKS OF HIS ESCORT--VILLAGES DESCRIBED--DETAINED BY A SULTANA--THE RECEPTION SHE GIVES SPEKE--ILLNESS IN THE CARAVAN--INON--LEAVING ISAMIRO, THE NYANZA APPEARS IN SIGHT--THE SCENE--HE CALLED THE LAKE VICTORIA NYANZA-- DESCENDS TO MUANZA--THE SOURCE OF THE NILE!--RETURN JOURNEY, AND ARRIVES AT CAZE--ARRIVES WITH CAPTAIN BURTON IN ENGLAND.