|  | preface, page vi:- Practice serves but to establish the unhappy mannerist in 
his vices. He repeats daily, what each repetition renders 
more disgusting, and at length sinks into obscurity, 
neglected, for new visionaries, by those who applauded the 
errors of his youthful pencil, and confirmed him in their 
adoption.
 A similar, perhaps a greater danger exists in the study of 
landscape.
 The antique, and the living subject, are easily accessible. 
They may both be successfully studied under the roof of 
Somerset House. But there is no roof, except the canopy of 
heaven,under which the landscape painter can study with 
advantage. Man, or his image, may be moved at pleasure;
 page vii:-
 but mountains remain eternally on their bases, and rivers 
flow in an unchanging current, far from the seat of rank and 
opulence, and the consequent residence of those artists, 
(and many they are) who prefer drinking the stream after it 
has passed through a variety of impure channels, to 
resorting to the fountain head. This cause combines with the 
influence of fashion, and the most opposite manners are thus 
generated. Those who are wrong do not even wish to be right; 
but, viewing all nature through the medium of a confirmed 
manner, pronounce every thing in art to be erroneous that 
does not exactly correspond with their practice.
 Without, in the slightest degree,
 
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