about ten yards wide, and very shallow. The question, 
‘ Was the Rusizi an effluent or an influent?’ was settled 
for ever.” 
Much, if not the whole credit of this discovery, the 
most valuable geographical point of the journey, is due to 
Mr. Stanley, who suggested to Dr. Livingstone the de- 
sirability of its examination and the completeness of the 
circumnavigation of the head of the lake, along with the 
presence there of the most experienced of African tra- 
vellers, leave no possible doubt remaining. The view 
first taken by Burton and Speke is amply confirmed, | 
and the Tanganyika has certainly no outlet at its northern 
end. 
When approaching Ujiji, Mr. Stanley heard a sound as 
of distant thunder in the west, and on asking his guides if 
it were thunder he was told that it was Kabogo, “a great | 
mountain on the other side of Tanganika, full of deep | 
holes into which the water rolls,” “ Many boats have been | 
lost there; . . . The sound of the thundering surf 
which is said to roll into the caves of Kabogo was heard _ 
by us, therefore, at a distance of over one hundred mile 
away from them.” This story, in which Mr. Stanley him-_ 
self does not appear to place much confidence, has sug- 
gested a possible outlet of the Tanganyika to the Lualaba — 
system by subterranean rivers through the mountains 
which enclose the lake on the west ; but, besides the ex- 
treme improbability of such a phenomenon, it is to be 
remembered that Livingstone, in coming to Ujiji from the 
Cazembe’s territory, must have passed close to these 
dreaded caves, and would not have gone by them without 
exploring, or at least hearing of their existence. Itisnot — 
recorded that Mr. Stanley consulted Livingstone on this 
subject. ~ 
A remarkable fact, which, taken in connection with our 
knowledge of the insignificant drainage to the Tanganyika, 
seems to lend still further confirmation to the view first ex- 
pressed by Burton that “the Tanganyika, situated like the © 
Dead Sea, may maintain its level by the balance of supply _ 
z 
View on Lake Tanganika, 
and evaporation,” is Mr. Stanley’s observation of a clearly | 
marked high-water line of the lake on the rocky slope of a | 
promontory south of Ujiji. ‘“ This went to show that the 
Tanganyika, during the rainy season, rises about 3 ft. 
above its dry season level, and that during the latter 
season evaporation reduces it to its normal level.” On 
the contrary supposition of the existence somewhere of 
a considerable outflowing river from Tanganyika, it is 
difficult to account for such a rise and fall in a lake of 
upwards of 10,000 square miles in extent. 
The occasional descriptions of landscape throughout 
the volume are exceedingly graphic ; for example, the de- 
scriptions of the forest scenes in the newly traversed 
region of Ukonongo (p. 322) or of the park-like and pas- 
toral country of the coast slope (p. 167). With such an 
appreciation of the great landscape features of the chang- 
ing belts of country through which he passed, it is to be 
regretted that the pictorial illustrations of Mr. Stanley’s 
book should, with so few exceptions, be devoted to per- 
sonal incident. As in many books of travel, so here,a 
ship, a wild boar, an elephant, or a house, form — 
the subject of the majority of the pictures, the real 
scenery of the country being thrown in only as a 
background to these objects, drawings of which maybe 
readily obtained at home. : 
It is also a matter of regret that the chief map accom- — 
panying the volume does but scant justice to the observa- 
tions recorded in its pages ; a much more detailed repre- — 
sentation of the routes might have been given. We look 
in vain, for example, for the position of Mount Kibwe, 
which is frequently mentioned as one of the highest peaks 
of the mountains of Usagara, and which is the subject of 
perhaps the best illustration in the book. Again, “Mu- 
kondokua had been reached after three hours’ march 
direct west from Misanza,” but upon the map these places 
are shown relatively north-west and south-east ; Imreras, — 
