Samuel Baker was a contemporary of Speke and Burton and following the death of his first wife, he set off to explore the Nile accompanied by his second "wife" Florence.
Florence was a beautiful Transyvanian girl and Baker first came across her in 1855 whilst on a hunting trip with the Maharajah of Punjab, in what was then part of the Ottoman Empire. She was only 14 (he was 38) and she was being offered for sale in an Ottoman slave auction! Baker fell for her and despite the fact that the local Pasha had bought her, Baker managed to steal her away.
The two of them subsequently set off to explore the Nile in 1861 and in due course were the first Europeans to come across Lake Albert. They walked up the east side of the lake and found the inlet of what they recognised from Speke's description to be the Victoria Nile - and having followed that upstream for 20km or so they came across a huge waterfall, which Baker named after the then president of the Royal Geographical Society, Sir Roderick Murchison. This brown nosing obviously did the trick because on their return to the UK Baker was awarded the RGS Gold Medal.
Baker eventually got around to marrying Florence in 1865, but although Queen Victoria knighted Baker in 1866 she refused to meet Florence, because she suspected (correctly) that Baker had been intimate with his wife before they got married.