P R EFACE. 
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 the 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 
already 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 journey. My companions were, 
for various reasons, equally unable 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 our notes and journals. 
Vll 
