Westmoreland and Cumberland. 197 
the ash and the alder, which in common 
growth are not often remarked for their 
beauty, here acquire a delicacy of foliage 
that entitles them to a companionship with 
the beech, the larch, the willow and the 
acacia. 
The fine slopes of sheep walk rising from 
the lake, are completely sheltered by planta- 
tions of most luxuriant growth, and above 
these, an astonishing succession of lofty 
mountains are changing their mighty profiles 
and fantastic features at every step you take. 
In their nearer approaches to each other, they 
form dark and dismal glens: receding, they 
open into the most enchanting valleys, the 
sides of whichare often fringed with coppice, 
and almostall of them are enlivened by some 
brilliant little trout stream, returning its crystal 
water to the larger rivers on the lakes below. 
That beautiful ephemera the May fly, or as 
it is called in Derbyshire the drake, makes 
its appearance on these rivers from the Ist to 
the 12th of June. Finding its wings then at 
liberty, it rises from the bottom of the water 
with the husk of the pupa still attached to 
the lower part of the body; but on reaching 
the surface it disentangles itself entirely, and 
flies, with much difficulty, to the first tree or 
