178 THE DRY FLY AND FAST WATER 



gave up a minute piece of its caudal fin in re- 

 turn for its life. 



Often, too, one hears of trout being taken 

 with the fly of some luckless or careless angler 

 fast in its jaw. On the Brodhead, in 1907, one 

 morning about eight o'clock, I rose and killed a 

 native trout weighing about a pound, which had 

 a fly in its lip left there by an angler the eve- 

 ning before; his nose was raw and bleeding where 

 he had scraped it against the stones in his 

 efforts to dislodge the hook. Experiences of 

 this sort do not tend to confirm the belief that 

 fish have memory. 



The more enemies an animal has the more 

 wary it is, and in those least able to defend them- 

 selves against attack the senses which enable 

 them to avoid danger are most keen. In some 

 animals, sight, smell, and hearing are all keenly 

 alert; in others a combination of two of these 

 senses is relied upon, and in rare cases but one. 

 These faculties give warning of the approach of 

 an enemy, and time, in most cases, for the use of 

 such secondary means of defence as are provided 

 by nature speed, flight, protective colouring, 

 or whatever they may be. 



In the case of trout, since scientists have 

 come to no definite conclusion that fish can 



