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
Travels to Discover the Source of the Nile the best is that of Major (afterwards Sir) Francis Head, the author of a well-informed "Life of Bruce" (London, 1830). Wrote Head of Bruce's descriptions: Travels to Discover the Source of the Nile Travels to Discover the Source of the Nile, In the Years 1768, 1769, 1770, 1771, 1772 and 1773 is a multi-volume account by the Scottish traveller James Bruce (1730–94) of his journeys in the Horn of Africa, which includes an eye-witness account of Ethiopian history and culture, as well as a description of that country and the neighboring kingdom of Sennar and the Ottoman province of Habesh.