Explorers and their Explorations, 
slave- catchers almost unknown. Out of this lake the 
Lukuga sets, carrying off its surplus waters, conveying them 
into the Lualaba, and thence into the Congo, from which 
they pour into the broad Atlantic. This theory has 
recently been confirmed by the observations of Mr. Hore, 
the missionary navigator of Lake Tanganyika, and agent of 
the London Missionary Society. 
The mystery of the Congo, with its connecting rivers, 
Lualaba and Lukuga, still remained, and this mystery pre- 
sented irresistible attractions to Stanley. He had spent 
two years in exploring the Victoria Nyanza and its sur- 
rounding country, and now looked longingly at this un- 
solved problem of Western Africa ; indeed, it was not 
known whether this river system really flowed into the Nile 
region and fed the Egyptian river, or went away to the West 
Coast ; and this was the mystery which Stanley set himself 
to find out. So, having marshalled his hundred and forty 
followers — all that remained to him of the three hundred 
and fifty who started two years previously — he harangued 
them, and encouraged them to take up, with him, this brave 
enterprise. They had need of bravery and endurance, for, 
compared with the task which yet lay before them, all 
that had gone before was mere child's play. Cameron had 
longed to pursue the Congo to its mouth, but the insuperable 
difficulties the feat presented to an almost lonely traveller, in- 
duced him to turn aside and walk "across Africa" in a south- 
westerly direction. He visited Kasongo's country, struck 
the Lualaba at various points, travelled through Bihe, and 
the coast lands, so finding his way to the Atlantic Ocean. 
In setting himself to explore the Congo, Stanley com- 
menced a frightful task. He first of all penetrated the 
three or four hundred miles lying between Ujiji and 
Nyangwe, a place situated on the Lualaba. Livingstone 
