The crudeness of colour and asperity of tone observable in the Roman School, though founded on simplicity, is perhaps a greater proof of their want of eye and taste than of a pure historic principle. Harmony of colour consists in the due balance of all, equally remote from monotony and from spots. Though each part of Roman pictures be painted with sufficient breadth of manner, their discordance is such that they do not coalesce into one whole, but appear unconnected fragments in apposition. Their theory of shade is so defective, that the parts deprived of light of the same body, or the same piece of drapery, are not effaced, but coloured. If the positive reds and blues of the Roman school invigorate the eye, they likewise command it, and counteract the grandeur of History in a degree not much inferior to the bad effect produced by the imitation of stuffs discriminated according to their texture; their bright asperity, and bleak purity, equally pervert the negative and subordinate character of drapery, and attract a larger share of attention from the beholder than they deserve. A Madonna in the hands of Carlo Maratti, and sometimes even of Raffaello, at least in his earlier productions, is the least visible part of herself. The most celebrated Madonna of Andrea del Sarto, though in Fresco, is certainly more indebted to her drapery than her face, perhaps still more to the sack on which her husband rests, and from which the picture got its name. From this censure we ought to except M. Angelo Caravaggi, and Andrea Sacchi, whose works, though else so dissimilar in principle and execution, coincide in reducing colour frequently to little more than chiaroscuro; the one for melancholy and forcible, the other for visionary or devotional effects. The Pilgrims adoring the Madonna with the Infant in St. Agostino, by the former, seem not painted but tinged in the last golden ray of departing eve; whilst the Vision of St Romualdo, by the latter, surrounds us with gray twilight and gradual evanescence. A general style of colours thus amalgamated, appears to me a principle much superior to that of _corruption_ of them, which Plutarch mentions as the invention of Apollodorus the Athenian, when painting had scarcely emerged from the linear process, and it required some courage to wield a brush. If the ancients ever possessed the Bolognese corruption of colours, it must have been in periods of refinement. The Φθορα of Apollodorus was probably the invention of demi-tints, the effect of which is produced by "corrupting" or lowering the elemental purity of the two of which it is composed. The axiom, that the less the traces appear of the means by which a work has been produced, the more it resembles the operations of nature,--is not an axiom likely to spring from the infancy of Art.