He was asked to find the Nile's source before marrying the cinematic Queen of the Nile in 1964
In 1854 he made his first voyage to Africa, first arriving in Aden to 
ask ... Speke then asked to join an expedition about to leave for Somaliland led 
by the .... of the Royal Geographical Society (RGS) was to find the source of the 
Nile.