David. 1813–73, Scottish missionary and explorer in Africa. After working as a missionary in Botswana, he led a series of expeditions and was the first European to discover Lake Ngami (1849), the Zambezi River (1851), the Victoria Falls (1855), and Lake Malawi (1859). In 1866 he set out to search for the source of the Nile and was found in dire straits and rescued (1871) by the journalist H. M. Stanley

Kenneth Robert, known as Ken. born 1945, Labour leader of the Greater London Council (1981–86); Member of Parliament (1987–2001); Mayor of London (2000–08)