after the falling of the rivers at the end of 

 the rains, for, though he has his best time 

 when the water clears, it may so rapidly 

 dry up that, after being in order for fish- 

 ing for a week or two, it again dwindles 

 to a series of isolated pools full of fish 

 that are as adamant to all the angler's 

 overtures. 



Although the sun's heat means less to 

 every one in northern Europe than in 

 southern Asia, the influence of tempera- 

 ture on fish and fishing is by no means 

 to be ignored, and some fishermen indeed 

 consider it of first importance. It is on 

 lake-trout that its effect is perhaps most 

 noticeable. Writing of such, with refer- 

 ence to the Orkney lochs, Mr. Sutherland 

 Graeme says : 



Trout " Loch-trout will not take if the water 



is too warm, but I cannot say that I have 

 ever by thermometer tested the tempera- 

 ture at which they cease to rise. If there 

 is a period of great heat, such as I have 

 only known twice in Orkney, the fish 

 in my shallow lochs just lie gasping 



