P R E F A C E. 



This book contains a detailed account 

 of the expedition which I led from 

 April to September of 1906, to 

 explore the snow range of Ruwen- 

 zori, upon tlie borders of Congo 

 and Uganda, in the centre of 

 Equatorial Africa. 



The book includes the data of 

 observations, and all the facts 

 upon which the geographical and 

 scientific results of the expedition 

 are based. These results I have 

 ali'eady given in outline in my lectures before the Italian 

 Geographical Society and the Royal Geographical Society, 

 which were subsequently published in the " Bollettino " and 

 " The Geographical Journal." 



I had not at my disposal the time requisite for writing 

 myself a full account of this joiu'ney. My companions were, 

 for various reasons, equally luiable to undertake the task. 

 Cav. Filippo De Filippi had already published an accurate and 

 painstaking account of a previous exploration, in which he had 

 been one of my companions. It, therefore, occurred to me to 

 request him to write the story of the Ruwenzori Expedition 

 from oiu" notes and jouinals. 



