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. My own expeditions in various parts of Bornou, in Mandara, and Loggun, and the two fruitless attempts I made to complete the tour Of the great lake Tchad, will be found to occupy a considerable portion Of the volume; and being made in countries, and among a people unknown to Europeans,-many Of them even by name or report, - it is hoped that observations, faithfully and circumstantially minuted down at the time and spot, will not be found tedious or uninteresting to the reader.