The moment the eye perceives that the picture is produced by other than the professed means, the effect, the appeal to the imagination, is disturbed. - Alfred Horsley Hinton

It must not be supposed that it is always necessary to present our landscapes with an attractive and well-defined arrangement of clouds; on the contrary, it will often happen that the effect of a scene is best emphasized by a mere grey tint representing a covered sky or even a blue, cloudless sky; but this is a very different thing to rendering it as a white blank.

Size, the mere number of square inches, of a picture, counts for nothing. A small picture may be quite as satisfying as a large; for remember that, as compared with the size of the mountain itself, the difference between a picture of it, thirty inches long, and one of six inches, is less than trifling.

… nature often produces combinations and effects which on paper appear incorrect.