Jakob Erhardt
Johann Jakob Erhardt, or John James Erhardt, was a German missionary and explorer who worked in East Africa and India. Although he remained on or near the coast of East Africa, he contributed to European knowledge of the interior through gathering descriptions from local people who had traveled there. His map of the region stimulated dispatch of the expedition of Burton and Speke.
Erhardt was born onApril 1823 in Bnnigheim, then in the Kingdom of Wrttemberg. He was the son of a master tailor, and was apprenticed to a cooper. He worked with the Boennigheim Pietists, then joined the Basel Mission, where he was trained as a missionary until 1846. From 1846 to 1848 he studied with the Church Mission Society in London, where he was ordained in 1848.
Source: Wikipedia