Alan Gallop 
Mr. Stanley, I Presume? [EPUB ebook] 
The Life and Explorations of Henry Morton Stanley

Famous for having found the great missionary and explorer Dr David Livingstone on the shores of Lake Tanganyika and immortalised as the utterer of perhaps the four most often quoted words of greeting of all time — 'Dr Livingstone, I presume?' — Henry Morton Stanley was himself a man who characterised the great wave of exploring fever that gripped the nineteenth century.