Such were the principles whose gradual evolution produced that coloured imitation which, far beyond the fascination of Giorgione, irresistibly entranced every eye that approached the magic of Tiziano Vecelli. To no colourist before or after him, did Nature unveil herself with that dignified familiarity in which she appeared to Tiziano. His organ, universal and equally fit for all her exhibitions, rendered her simplest to her most compound appearances with equal purity and truth. He penetrated the essence and the general principle of the substances before him, and on these established his theory of colour. He invented that breadth of local tint which no imitation has attained, and first expressed the negative nature of shade: his are the charms of glazing, and the mystery of reflexes, by which he detached, rounded, corrected or enriched his objects. His harmony is less indebted to the force of light and shade, or the artifices of contrast, than to a due balance of colour equally remote from monotony and spots. His tone springs out of his subject, solemn, grave, gay, minacious, or soothing; his eye tinged Nature with gold without impairing her freshness: she dictated his scenery. Landscape, whether it be considered as the transcript of a spot, or the rich combination of congenial objects, or as the scene of a phenomenon, as subject and as background, dates its origin from him. He is the father of portrait-painting, of resemblance with form, character with dignity, and costume with subordination. Colour may be considered relatively to the whole or the detail of the parts that compose a picture. In that point of view it depends on the choice of a sovereign tone; in this on the skilful disposition, gradation, rounding, and variety of the subordinate tones, their principal light, the local colour, the half tints, the shades, and the reflexes. The general regulation of the primary tone, and the specific arrangement of the subordinate ones for the rounding of every figure, is the same. In both, the attention is to be directed to obtain a principal mass of light, and a predominant colour. This is to be supported by the mutual assistance and reciprocal relief of secondary ones, must be associated with the demi-tint and the shades, and recalled and relieved by the reflexes. When treating on Chiaroscuro, we have observed what may now be applied to Colour, that the primary tone depends on choice, and is arbitrary; but it decides all the rest, as the tone of the first violin in a regular concert tunes all the voices and all the instruments. Its effect entirely depends on the union of the surrounding tones with it, and has no other value but what it derives from contrast. By this the simplest tone, well managed, may become rich, splendid, and harmonious; it is then the tone of nature; whilst the most brilliant colour, if contradicted or disappointed by the detail of inferior ones, may become heavy, leathern, and discordant.