64 THE DRY-FLY MAN'S HANDBOOK 



walking down after it as it proceeds down the stream 

 and over the feeding fish. This cast is again seldom 

 successful with trout, but at times grayling seem to 

 prefer a fly cast in this way. The reader must study 

 the chapter on " Drag " when devoting his attention 

 to the questions of drifting and the half drift. He 

 can safely sum up the question in a few words : when- 

 ever and wherever possible the dry-fly man should 

 cast upstream, and whenever and wherever he deviates 

 from this golden rule, his chances of success are indeed 

 remote. 



