"With the copy Jervas made of this picture he was grievously disappointed. 'I had frequently,' he said to me, 'pleased myself by reflecting, after I had produced what I thought a brilliant effect of light and shadow on my canvas, how greatly that effect would be heightened by the transparency which the painting on glass would be sure to produce. It turned out quite the reverse.'" APPENDIX III. CLASSICAL ARCHITECTURE. This passage in the lecture was illustrated by an enlargement of the woodcut, Fig. 1; but I did not choose to disfigure the middle of this book with it. It is copied from the 49th plate of the third edition of the _Encyclopædia Britannica_ (Edinburgh, 1797), and represents an English farmhouse arranged on classical principles. If the reader cares to consult the work itself, he will find in the same plate another composition of similar propriety, and dignified by the addition of a pediment, beneath the shadow of which "a private gentleman who has a small family may find conveniency." APPENDIX IV. SUBTLETY OF HAND. I had intended in one or other of these lectures to have spoken at some length of the quality of refinement in Colour, but found the subject would lead me too far. A few words are, however, necessary in order to explain some expressions in the text. "Refinement in colour" is indeed a tautological expression, for colour, in the true sense of the word, does not exist until it _is_ refined. Dirt exists,--stains exist,--and pigments exist, easily enough in all places; and are laid on easily enough by all hands; but colour exists only where there is tenderness, and can be laid on only by a hand which has strong life in it. The law concerning colour is very strange, very noble, in some sense almost awful. In every given touch laid on canvas, if one grain of the colour is inoperative, and does not take its full part in producing the hue, the hue will be imperfect. The grain of colour which does not work is dead. It infects all about it with its death. It must be got quit of, or the touch is spoiled. We acknowledge this instinctively in our use of the phrases "dead colour," "killed colour," "foul colour." Those words are, in some sort, literally true. If more colour is put on than is necessary, a heavy touch when a light one would have been enough, the quantity of colour that was not wanted, and is overlaid by the rest, is as dead, and it pollutes the rest. There will be no good in the touch.