"It is a pity that M. Daubigny, the landscape painter, with a sentiment so true, just and natural, contents himself with a first impression and neglects at this point the details. His pictures are no more than sketches, and sketches little advanced; it is to a system that one should attribute this careless manner which we believe dangerous for the future of the painter if he does not quickly abandon it. Each object delineates itself by an apparent or real contour, but the landscapes of M. Daubigny offer little except spots of color placed in juxtaposition. It needs, however, but a few days' labor to make excellent pictures of these insufficient preparations."
January 1, 1970
https://en.wikiquote.org/wiki/Charles-Fran%C3%A7ois_Daubigny