THE TEMPERATURE 71 



ence. This must speedily be realised by 

 all whose wanderings in pursuit of trout 

 extend from the South of England to 

 the Highlands. The climates of these 

 places are not the same. In Cornwall, 

 or in Devonshire, or in Hampshire, a 

 shower of snow in March is :so unusual 

 as to be noticeable ; in the Highlands, 

 until the end of April, it is as common 

 as a shower of rain, and is not a freak 

 even so late as Whitsuntide. Besides, 

 fishing in the North begins much earlier 

 than in the South. From the Thames 

 to the Test it is not considered sports- 

 manlike to seek trout until April ; but in 

 the North they are fair game a month 

 before that. It is in the Highlands that 

 this problem of temperature is to be 

 looked into most scientifically : it is there 

 the data are most comprehensive. 



What, then, do we find in the North ? 

 Do one's experiences early in the season 

 afford sanction for the common belief that 

 the trout are kept down by cold ? They 

 do not. " Snow brew," admittedly, is un- 



