CHAP, i.] MIGRATION OF TROUT. 17 



but to every prowling fox or wild cat who passes their way 

 during the autumn, and all vermin instinctively hunt along the 

 edge of water during the night time. A trout in shallow water 

 is easily caught by any of these animals. Even the buzzard and 

 the raven succeed in capturing them when they are left in small 

 rills, as is frequently the case, having been tempted to ascend 

 them by some shower, which swells the water for a short time 

 and then leaves it as low as ever. 



