PHYSICAL FEATURES. 193 



across the valley, but it rushes through a network of irregular and 

 ever-shifting furrows, rolling along with it large boulders which rattle 

 loudly as they come into collision. These floods by their suddenness 

 constitute a source of danger to the flocks, especially to small animals 

 like sheep and goats, which may be knocked over by the moving 

 boulders and carried away by the flood. The wells where these 

 animals are taken to drink are usually dug in the middle of these 

 broad valleys, and it is a curious sight when the sky becomes threat- 

 ening to watch the shepherds drive away their flocks on to the sur- 

 rounding hill slopes where they can await in safety the passing of 

 the flood. 



( 15 ) 



