Meanwhile, Buganda was receiving not only traded goods and guns but a stream of foreign visitors as well. The explorer John Hanning Speke passed through Buganda in 1862 and claimed he had discovered the source of the Nile. Both Speke and Stanley (based on his 1875 stay in Uganda) wrote books that praised the Baganda for their organisational skills and willingness to modernise. Stanley went further and attempted to convert the king to Christianity. Finding Kabaka Mutesa I apparently receptive, Stanley wrote to the Church Missionary Society (CMS) in London and persuaded it to send missionaries to Buganda in 1877.