|  | Gentleman's Magazine 1899 part 2 p.545 The shepherd may be driving, on what appears to be a settled 
summer day, along an elevated valley, walled in by rocky  
ridges, when a cloud drives in behind and beneath him,  
completely blotting out dogs and flock in a filmy veil. At  
such time young shepherds may lose their bearings and wander 
into an adjacent valley, but the dogs will bring their  
charges safely home. Sheep do not move far when the mist  
hangs, but as soon as it rises make off like the wind.  
Experienced men, therefore, simply halt and wait for the  
clearing, which may be some hours distant. But even if he  
abandoned his flock, the shepherd would come to no harm. The 
novice at traversing fells under cloud may suddenly find  
himself on a ledge where an incautious movement threatens a  
fall into a tremendous chasm, but there have been signs of  
this far back. Occasionally a shepherd who has been caught  
in the mist walks home in front of his flock, having passed  
through without seeing or hearing them. It is obvious that  
the air, being surcharged with particles of moisture so fine 
and dense as to convey a white impression to the eye, will  
not readily carry sound.
 There are many opinions as to whether sheep-dogs are ever at 
a loss to determine their position as well as that of the  
flock. My own idea is that they locate themselves perfectly  
by hearing - and it is acknowledged that their sense in this 
direction has a wider range than ours. Some of the more  
observant shepherds, too, use this power. They are aware of  
wide differences in the sound of wind and streams at  
different points of their beats, and of this we have a  
proof. We were wandering over Bowfell with an old shepherd.  
The mist hung in ragged edges half way down the Band; the  
ill-marked path ceased at the summit, and we blundered along 
towards Esk-hause. The old man allowed us to guide until we  
came to where sheer cliffs seemed to drop in every  
direction, and we in despair appealed to him.
 "Listen," he said.
 A curlew whistled far above, the wind lisped among the crags 
and screes around, the merry rattle of a distant rill rose  
from beneath. The old man, without a word, of explanation,  
took us round the hillock, and again we listened. The curlew 
was silent, the wind a trifle more boisterous, and the sound 
of rushing waters more clear.
 "The sound heard on the far side of the hill was that of the 
outlet of Angle Tarn" (which, indeed, was almost sheer  
below), "whereas you now hear the infant Esk."
 The weeks pass on - the days are sultry and the newly shorn
 
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