[18] Notwithstanding the deep-rooted notion, even among the majority of painters themselves, that time is a great improver of good pictures, I will undertake to shew, that nothing can be more absurd. Having mention'd above the whole effect of the oil, let us now see in what manner time operates on colours themselves; in order to discover if any changes in them can give a picture more union and harmony than has been in the power of a skilful master, with all his rules of art, to do. When colours change at all it must be somewhat in the manner following, for as they are made some of metal, some of earth, some of stone, and others of more perishable materials, time cannot operate on them otherwise than as by daily experience we find it doth, which is, that one changes darker, another lighter, one quite to a different colour, whilst another, as ultramarine, will keep its natural brightness even in the fire. Therefore how is it possible that such different materials, ever variously changing (visibly after a certain time) should accidentally coincide with the artist's intention, and bring about the greater harmony of the piece, when it is manifestly contrary to their nature, for do we not see in most collections that much time disunites, untunes, blackens, and by degrees destroys even the best preserved pictures. But if for argument sake we suppose, that the colours were to fall equally together, let us see what advantage this would give to any sort of composition. We will begin with a flower-piece: when a master hath painted a rose, a lily, an african, a gentianella, or violet, with his best art, and brightest colours, how far short do they fall of the freshness and rich brillancy of nature; and shall we wish to see them fall still lower, more faint, sullied, and dirtied by the hand of time, and then admire them as having gained an additional beauty, and call them mended and heightened, rather than fouled, and in a manner destroy'd; how absurd! Instead of mellow and softened therefore, always read yellow and sullied, for this is doing time the destroyer, but common justice. Or shall we desire to see complexions, which in life are often, literally, as brillant as the flowers above-mention'd, served in the like ungrateful manner. In a landskip, will the water be more transparent, or the sky shine with a greater lustre when embrown'd and darken'd by decay? surely no. I own it would be a pity that Mr. Addison's beautiful description of time at work in the gallery of pictures, and the following lines of Mr. Dryden, should want a sufficient foundation;-- For time shall with his ready pencil stand, Retouch your figures with his ripening hand; Mellow your colours, and imbrown the tint; Add every grace which time alone can grant; To future ages shall your fame convey, And give more beauties than he takes away. Dryden to Kneller.