94 FISHERMEN'S WEATHER 



which are considered only worth visiting 

 when the wind blows from an easterly 

 quarter, but this may merely be an acci- 

 dent of situation." 



Loch The sun, as may be supposed, soon 



warms the water of shallow lochs, as a 

 result of which the fisherman gets his 

 trout early and in good condition. Loch 

 Lomond is a case of a deep lake, and 

 quantities of snow-water run into it from 

 the hills around. This makes it a late 

 loch, there being, as a rule, no rise of fly 

 until well on in May. Mr. Russell refers 

 to this as solely a matter of temperature. 

 "It appears to me," he writes, "simply 

 that the cold water retards the rise of fly 

 and the warm hastens it, and you do not 

 get trout unless there is a rise. I am 

 informed on excellent authority that, 

 curiously enough, the head -waters of 

 the streams in southern Perthshire are 

 usually best for trout, owing to the fact 

 that the water at their source is warmer 

 than after exposure to the atmosphere, and 

 consequently there is more insect food." 



