

'March being the mod variable mofith 

 in the feafon for fly-fifhing, renders it 

 ncceflfary to inform you, that the frofts 

 occafioned by north, or eaflerly winds, 

 will often caufe a fortnight's difference 

 in the appearance of the flies ; there- 

 fore in a miid feafon you muft expc6l 

 them much earlier than in a cold one ; 

 and in a fouthern latitude earlier than 

 of a northern. 



I am, Sir, 

 Your's, &c, 



R. S. 



LETTER 



