John Hanning Speke of the way. Once Speke and Burton were back on the coast they went by ship to Zanzibar and then traveled to Aden. When back at the coast Burton had written a letter to Norton Shaw of the Royal Geographical Society (which had partially sponsored the journey) in which Burton enclosed a map of Lake Victoria made by Speke and wrote "there are grave reasons for believing it (the map) to be the source of the principal feeder of the White Nile." Once in Aden, Burton was not granted a medical certificate to travel and thus Speke left on HMS
John Hanning Speke his femur and exiting. Showing tremendous determination he used his bound fists to give his attacker a facial punch and this gave Speke an opportunity to escape, albeit he was followed by a group of Somalis and he had to dodge spears as he was running for his life. Rejoining Burton and Herne the trio eventually managed to escape with a boat passing along the coast. The expedition was a severe financial loss and Speke's natural history specimens from his earlier leg were used to make up for some of it. Speke handed Burton his diaries that Burton used as