Fig. 4 is its profile, rather carefully drawn at the top, to show the tulip and turkscap lily leaves. Underneath there is a plate of iron beaten into broad thin leaves, which gives the centre of the balcony a gradual sweep outwards, like the side of a ship of war. The central profile is of the greatest importance in ironwork, as the flow of it affects the curves of the whole design, not merely in surface, as in marble carving, but in their intersections, when the side is seen through the front. The lighter leaves, _b b_, are real bindweed. Fig. 5 shows two of the teeth of the border, illustrating their irregularity of form, which takes place quite to the extent indicated. Fig. 6 is the border at the side of the balcony, showing the most interesting circumstance in the treatment of the whole, namely, the enlargement and retraction of the teeth of the cornice, as it approaches the wall. This treatment of the whole cornice as a kind of wreath round the balcony, having its leaves flung loose at the back, and set close at the front, as a girl would throw a wreath of leaves round her hair, is precisely the most finished indication of a good workman's mind to be found in the whole thing. Fig. 7 shows the outline of the retracted leaves accurately. It was noted in the text that the whole of this ironwork had been coloured. The difficulty of colouring ironwork rightly, and the necessity of doing it in some way or other, have been the principal reasons for my never having entered heartily into this subject; for all the ironwork I have ever seen look beautiful was rusty, and rusty iron will not answer modern purposes. Nevertheless it may be painted, but it needs some one to do it who knows what painting means, and few of us do--certainly none, as yet, of our restorers of decoration or writers on colour. It is a marvellous thing to me that book after book should appear on this last subject, without apparently the slightest consciousness on the part of the writers that the first necessity of beauty in colour is gradation, as the first necessity of beauty in line is curvature,--or that the second necessity in colour is mystery or subtlety, as the second necessity in line is softness. Colour ungradated is wholly valueless; colour unmysterious is wholly barbarous. Unless it looses itself and melts away towards other colours, as a true line loses itself and melts away towards other lines, colour has no proper existence, in the noble sense of the word. What a cube, or tetrahedron, is to organic form, ungradated and unconfused colour is to organic colour; and a person who attempts to arrange colour harmonies without gradation of tint is in precisely the same category, as an artist who should try to compose a beautiful picture out of an accumulation of cubes and parallelepipeds.