I explored parts of the United States and Panama before returning to England in 1861. My greatest journey began in what is now eastern Tanzania in 1857. I became ill on the trip and was unable to travel with John Speke to discover Lake Victoria, the source of the Nile River. I was the first white man in modern times to view Lake Tanganyika. Clue2 The river discovered by this explorer is 2900 miles long.
Rapids prevent navigation to ports on the upper portion.
Our explorer erected a stone cross in honor of the King of his country in the land he discovered. Our explorer created a marble pillar at Shark's Point. He found the 5th longest river in the world. Clue7 Our explorer was the first European to set foot in Namibia. The initials of our explorer are the initials of a capital of a country.