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 Kirk (explorer) William Carnegie Kirk was author of "A British Garden Flora". The engineer, Alexander Carnegie Kirk, was John Kirk's elder brother. From 1858 to 1864 Kirk accompanied the explorer Dr David Livingstone on the Second Zambezi Expedition as a botanist and experienced his work to end the East African slave trade. He found Livingstone an inept leader and in 1862 wrote "I can come to no other conclusion than that Dr. Livingstone is out of his mind and a most unsafe leader"". In 1866 Livingstone’s began his next and final expedition, to find the source of the Nile, from Zanzibar. From