Editing John Hanning Speke (section)

===Return to England and debate over the source of the Nile===
On 26 September 1858 the return journey from [[Kazeh]] was started with 152 porters; both men had to return as their military leaves were coming to an end, although Jeal contends that they could have extended the trip by asking for an extension, as their clear mission statement of the [[Royal Geographical Society]] (RGS) was to find the source of the Nile. The expedition had lost a great many people through desertions, disease and hostilities, but in Kazeh, on the return journey, Mabruki had recruited local porters. Again Speke and Burton suffered from severe illnesses and had to be carried in a litter (machilla) by the porters some of the way. Once Speke and Burton were back on the coast they went by ship to Zanzibar and then travelled to [[Aden]]. Once in Aden, Burton was not granted a medical certificate to travel and thus Speke left on HMS ''Furious'' and arrived in England on 8 May 1859.  Burton was not far behind and he arrived on 21 May 1859.  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 lake) to be the source of the principal feeder of the White Nile."<ref name="Jeal2011"/>

Now further disagreements developed; Burton maintained that they had promised each other in Aden not to make public announcements till they both were back in England and Burton accused Speke of a breach of promise for publicly claiming that the source of the Nile was found on their trip. Burton now turned against the theory that Lake Victoria was the source of the Nile (and now said the river flowing ''out'' of the north side of Lake Tanganyika was the source) and thus also reversed himself from the position he took in the letter to Norton Shaw. In that same letter to Shaw, Burton had also stated that Speke would present his findings to the RGS, as he was prevented from traveling because of poor health and would be in England a short time after Speke.<ref name="Jeal2011"/>{{rp|105–111}} Jeal concludes that Burton's claim of a promise from Speke not to go to the RGS was improbable. The jealousies and accusations between the two men got ever greater, further inflamed by their respective circles of friends and people who stood to gain from the feud such as book publishers and newspapers.  Burton was still extremely weak, and once he appeared in front of a committee of the RGS he was not able to make a convincing case for his leading a second expedition to settle the outstanding matters about the Nile. The rift widened, and perhaps became irreversible, when Speke was chosen to lead a subsequent expedition instead of Burton.<ref name = "DNB">{{DNB Cite|wstitle=Speke, John Hanning}}</ref> The two presented joint papers concerning the expedition to the [[Royal Geographical Society]] on 13 June 1859.<ref name="BurtonSpeke1859">{{Cite journal | last1 = Burton | first1 = R. F. | author-link1 =Richard Francis Burton |first2=J.H. |last2=Speke|author-link2=John Hanning Speke | title = Explorations in Eastern Africa | journal = Proceedings of the Royal Geographical Society of London | volume = 3 | issue = 6 | pages = 348–358 | date = 13 June 1859 | doi = 10.2307/1799169 | publisher = Blackwell Publishing | jstor = 1799169}}</ref>