It will be found, throughout the picture, that the same species of improvement is made on the materials which Claude had ready to his hand. The descending slopes of the city of Rome, towards the pyramid of Caius Cestius, supply not only lines of the most exquisite variety and beauty, but matter for contemplation and reflection in every fragment of their buildings. This passage has been idealized by Claude into a set of similar round towers, respecting which no idea can be formed but that they are uninhabitable, and to which no interest can be attached, beyond the difficulty of conjecturing what they could have been built for. The ruins of the temple are rendered unimpressive by the juxtaposition of the water-mill, and inexplicable by the introduction of the Roman soldiers. The glide of the muddy streams of the melancholy Tiber and Anio through the Campagna, is impressive in itself, but altogether ceases to be so, when we disturb their stillness of motion by a weir, adorn their neglected flow with a handsome bridge, and cover their solitary surface with punts, nets, and fishermen.
It cannot, I think, be expected, that landscapes like this should have any effect on the human heart, except to harden or to degrade it; to lead it from the love of what is simple, earnest and pure, to what is as sophisticated and corrupt in arrangement, as erring and imperfect in detail. So long as such works are held up for imitation, landscape painting must be a manufacture, its productions must be toys, and its patrons must be children.
My purpose then, in the present work, is to demonstrate the utter falseness both of the facts and principles; the imperfection of material, and error of arrangement, on which works such as these are based; and to insist on the necessity, as well as the dignity, of an earnest, faithful, loving, study of nature as she is, rejecting with abhorrence all that man has done to alter and modify her. And the praise which, in this first portion of the work, is given to many English artists, would be justifiable on this ground only, that although frequently with little power and desultory effort, they have yet, in an honest and good heart, received the word of God from clouds, and leaves, and waves, and kept it,[N] and endeavored in humility to render to the world that purity of impression which can alone render the result of art an instrument of good, or its labor deserving of gratitude.