Inner Africa Laid Open, in an Attempt to Trace the Chief Lines of Communication Across that Continent South of the Equator: with the Routes to the Muropue and the Cazembe, Moenemoezi and Lake Nyassa; the Journeys of the Rev. Dr. Krapf and the Rev. J. Rebmann on the Eastern Coast, and the Discoveries of Messrs. Oswell and Livingstone in the Heart of the Continent