John Hanning Speke arrange a better relationship for Mere with another man, without success it seems. Finally, given permission by Mutesa in June 1862 to leave, Speke then travelled down the Nile now reunited with Grant. Because of travel restrictions placed by the local chieftains, slave raiding parties, tribal wars and the difficulty of the terrain, Speke was not able to map the entire flow of the Nile from Lake Victoria north. Why he did not make more efforts to do so is not clear, but the enormous hardships of the journey must have played a large role. By January 1863 Speke and
Richard Francis Burton (commonly called "The Arabian Nights" in English after early translations of Antoine Galland's French version); the publication of the "Kama Sutra" in English; and a journey with John Hanning Speke as the first Europeans to visit the Great Lakes of Africa in search of the source of the Nile. His works and letters extensively criticized colonial policies of the British Empire, even to the detriment of his career. Although he aborted his university studies, he became a prolific and erudite author and wrote numerous books and scholarly articles about subjects including human behaviour, travel, falconry, fencing, sexual practices and ethnography.