Here they found Mr.( afterwards Sir Samuel) Baker, who had travelled up the White Nile to investigate its source, which they thus proved to be in the Lake Victoria Nyanza.
Baker continued his search, and succeeded in showing that another source of the Nile was to be found in a smaller lake to the west, which he named Albert Nyanza.

Thus these three Englishmen had combined to solve the long-sought problem of the sources of the Nile.
The discoveries of the Englishmen were soon followed up by important political action by the Khedive of Egypt, Ismail Pasha, who claimed the whole course of the Nile as part of his dominions, and established stations all along it.

This, of course, led to full information about the basin of the Nile being acquired for geographical purposes, and, under Sir Samuel Baker and Colonel Gordon, civilisation was for a time in possession of the Nile from its source to its mouth.
Meanwhile Livingstone had set himself to solve the problem of the great Lake Tanganyika, and started on his last journey in 1865 for that purpose.

He discovered Lakes Moero and Bangweolo, and the river Nyangoue, also known as Lualaba.

So much interest had been aroused by Livingstone's previous exploits of discovery, that when nothing had been heard of him for some time, in 1869 Mr.H.
M.Stanley was sent by the proprietors of the _New York Herald_, for whom he had previously acted as war-correspondent, to find Livingstone.