OF FROST AND SNOW 145 



it does not often occur later in the season. 

 Sometimes, although there is no actual 

 frost, the temperature is abnormally low 

 in summer and in autumn. When 

 that happens, sport is poor ; but I think 

 that the prominent condition of the 

 atmosphere is only a symptom of the 

 cause. It may be that the trout are down 

 because flies are not up." Other corre- 

 spondents, indeed, regard frost as a help 

 in spring salmon-fishing. Mr. Marston 

 gives a good reason for holding this 

 opinion. After a frosty night a river 

 may have run down to the right height 

 for the best pools, owing to the frost 

 having arrested the flow of water from 

 the burns. 



Of all the Sahnonidce, the grayling Frost good 

 alone is generally regarded as feeding 

 better after a frost. Mr. Gallichan, 

 alone among those who refer to this fish, 

 does not favour frosty weather, but has 

 found that his best days with grayling 

 in November and December have been 



"mild, with a little sunlight at noon." 



10 



