Chapter IV. 
Near Nakitawa, at the entrance of the Mahoina Valley, the 
ancient moraines of the two valleys meet and unite together. 
In the corner formed by the meeting of the left moraine of 
Mahoma with the right moraine of Mobukn lies a little lake,, 
which was visited subsequently by the expedition on their 
return journey. 
The peaks of the Portal group soar up over the left side of 
the valley exactly opposite this camp. The two southernmost 
of these peaks stand like giant sentries on either side of the 
entrance of another great valley which here opens into the 
Mobuku. 
BUILDING SHEDS, IBANDA. 
The discovery of this important tributary valley, over¬ 
looked by all the previous explorers, permitted the Duke to 
arrive from the first at certain vital conclusions regarding the 
o o 
position of the peaks. 
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