CHAP. 1.] 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 smal] 
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, 
