342 SOUTHERN AND WESTERN SHORES OF THE CONTINENT. 



the traveller finds not a drop of water, no trace of vegetation. 

 His weary horse sinks, overcome with the pangs of thirst 

 and the fatigue of dragging its limbs through the soft sand. 

 Through this region the mule can alone be trusted, as, like 



A SAND-STORM. 



the camel of the Eastern desert, it will longer endure fatigue 

 and want of water. Here, as in the deserts of Africa, violent 

 winds stir up the sand, forming vast columns, as terrible in 



