GROWING WEALTH OF AFRICA. 
93 
1827-28 a journey to Timbuctoo, and thence through the desert to 
Morocco. 
In 1830 Lander traced a large part of the course of the Niger 
downward to its mouth, discovering its tributary, the Binue. 
In the south, Livingstone, who was stationed as a missionary 
at Kolobeng, setting out from that place in 1849, discovered Lake 
Ngami. In 1851 he went north again, and came upon numerous 
rivers flowing north, affluents of the Zambesi. In 1848 and 1849 
Krapf and Rebmann, missionaries in East Africa, discovered the 
mountains Kilimamjaro and Kenia. 
An expedition sent out by the British Government started 
from Tripoli in 1850 to visit the Sahara and the regions around 
REGION EXPLORED BY LIEUTENANT CAMERON. 
Lake Tchad, the chief being Richardson, Overweg, and Barth. The 
last alone returned in 1855, having carried his explorations over 
2,000,000 square miles of this part of Africa, hitherto almost 
unknown. 
Victoria having been discovered by Burton and Speke in 1858, 
and the latter having been visited by Speke and Grant in 1862 and 
found to give rise to the Nile, while the Albert Nyanza was dis¬ 
covered by Baker in 1864. 
In 1866 Livingstone entered on his last series of explorations, 
the main object of which was to settle the position of the water¬ 
sheds in the interior of the continent, and which he carried on till 
