inventors in all ages knew this. Protogenes and Apelles knew each other by their line. Raphael and Michael Angelo and Albert Dürer are known by this and this alone. How do we distinguish the owl from the beast, the horse from the ox, but by the bounding outline? How do we distinguish one face or countenance from another but by the bounding-line and its infinite inflections and movements? What is it that builds a house and plants a garden but the definite and determinate? What is it that distinguished honesty from knavery but the hard and wiry line of rectitude and certainty in the actions and intentions? Leave out this line and you leave out life itself; and all is chaos again, and the line of the Almighty must be drawn out upon it before man or beast can exist.’ He even insisted that ‘colouring does not depend upon where the colours are put, but upon where the light and dark are put, and all depends upon the form or outline’—meaning, I suppose, that a colour gets its brilliance or its depth from being in light or in shadow. He does not mean by outline the bounding-line dividing a form from its background, as one of his commentators has thought, but the line that divides it from surrounding space, and unless you have an overmastering sense of this you cannot draw true beauty at all, but only ‘the beauty that is appended to folly,’ a beauty of mere voluptuous softness, ‘a lamentable accident of the mortal and perishing life,’ for ‘the beauty proper for sublime art is lineaments, or forms and features capable of being the receptacles of intellect,’ and ‘the face or limbs that alter least from youth to old age are the face and limbs of the greatest beauty and perfection.’ His praise of a severe art had been beyond price had his age rested a moment to listen, in the midst of its enthusiasm for Correggio and the later Renaissance, for Bartolozzi and for Stothard; and yet in his visionary realism, and in his enthusiasm for what, after all, is perhaps the greatest art, and a necessary part of every picture that is art at all, he forgot how he who wraps the vision in lights and shadows, in iridescent or glowing colour, having in the midst of his labour many little visions of these secondary essences, until form be half lost in pattern, may compel the canvas or paper to become itself a symbol of some not indefinite because unsearchable essence; for is not the Bacchus and Ariadne of Titian a talisman as powerfully charged with intellectual virtue as though it were a jewel-studded door of the city seen on Patmos?