THE TANGANYIKA PROBLEM. 
viii 
ganyika problem thus lends itself to the formation of a connected 
story, and I can point out to the general reader, who may be 
attracted to the puzzle as he would be to a cock-fight, that he 
need not be alarmed at technicalities to follow, these having been 
intentionally rendered conspicuous for omission in small type. 
Moreover to those who know Africa, I think it may be positively 
refreshing to find that the interior has actually got some attributes 
besides a continued absence of gold, and a total unsuitability for 
European colonization. Further, since the present volume contains 
the only general, illustrated account of the animals found in the 
great lakes, it is hoped that it may be really of use to numbers of 
people, who in spite of attributes, still go out to the African 
interior, but who up to the present time have had no means of 
ascertaining the nature of the sometimes extremely good fishes 
they are continually eating. 
Of the manner in which the second Tanganyika expedition was 
organised, and of the method of treating the Tanganyika problem 
which I have adopted in the present volume, it is not necessary to 
speak. I have already dealt with these matters in the intro- 
ductory chapters ; but I may point out that I have intentionally 
introduced as many illustrations and photographs of the localities 
described as possible, since it seems to me that no one can form 
any clear idea of the physical characters of an extensive area from 
maps and descriptions alone. So again, in chapter six, I have 
re-introduced matter relating to the formation of Park lands upon 
alluvial flats, which I had already published in a former work ; 
while lastly, owing to a misapprehension under which Sir Harry 
Johnston labours with respect to the relation of his own to other 
explorations in the Mountains of the Moon, I have had to refer 
to this range at greater length than I originally intended ; but I 
do not wish it to be understood that I undervalue Sir Harry’s work 
in this direction ; on the contrary, I think it distinctly interesting 
and valuable, since, although he did not reach a?- high an altitude 
as myself, in all major points he has completely confirmed the 
results which I had previously attained. 
October , 1902, 
Londoti. 
