1813-1873 1821-1893 1857-1924 africa anne baker biography british britishcolonies central coloniesinliterature conrad david descriptionandtravel discoveriesingeography discoveryandexploration english englishliterature explorers florence greatbritain history historyandcriticism imperialisminliterature internationalrelations joseph literature livingstone nileriver slavetrade slavetradesuppressionnorth-eastafrica sudan travelbaker travelers'writings travellivingstone travelwriting womenexplorers