90 TREATISE ON FLY-FISHING. 



retaken in their native rivers, but from the 

 observations of Dr. Heysham, and Sir William 

 Jardine, it is evident, that if the fish happen to 

 have roved far from the estuary of their native 

 rivers, they run at the proper season, up any 

 stream, even the first they encounter, the tem- 

 perature and condition of which are congenial to 

 them. 



The growth of salmon, from the state of salmon 

 fry or smolt, to that of salmon peal and gilse, has 

 been shown to be very rapid, and the increase of 

 weight, during each subsequent year, is believed 

 to be equal, if not to exceed the weight gained 

 within the first. That this fish is a voracious 

 feeder may be inferred from the degree of perfec- 

 tion in the arrangement of the teeth ; yet few, of 

 the many observers, who have examined the 

 stomach, have been able to ascertain the exact 

 nature of that food which must constitute its prin- 

 cipal support. 



Faber, in his " Natural History of the Fishes 



