Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The map and the lists of stations, dates, etc., have been drawn upon the plan adopted by Mr. Francis Galton, The out line of Africa, the work of Mr. Weller, contains the lat est and the best information concerning the half-explored interior of the continent. The route-map has been borrowed by permis sion from the laborious and conscientious compilation of Mr. Find lay, accompanying the paper forwarded by me to the Royal Geographical Society. The latter gentleman has also kind ly supplied a profile of the country traversed, showing the east ern limits of the Great Depression, and the elevated-trough formation of Central Africa.