-* Stalking Expeditions in the Nyika 



which occur in a lon^, deep depression of the desert 

 surface. Over them, near them everywhere, indeed, that 

 the eye can reach the infinite desert shimmers in the 

 throbbing li^ht. 



The whole vast region lies in a dazzling idow, 

 intensified by the hot waves of air that ascend from it. 

 Over and over again experience and common-sense have 



to be called in to correct the delusions of the eye, which 

 constant!}" deceives itself with regard to the perspective. 

 1'or instance, while the eye supposes itself capable of 

 seeing herds of <^ame down there, as a matter of tact. 

 we can scarcely make out with the naked eye the bi^ 

 surfaces of our tents below us in the cam]) we can only 

 see them with the glasses. It is important that the tents 

 should stand out well from their surroundins, so the 



