Well, it was of the power to stimulate the tactile consciousness—of the essential, as I have ventured to call it, in the art of painting—that Giotto was supreme master. This is his everlasting claim to greatness, and it is this which will make him a source of highest æsthetic delight for a period at least as long as decipherable traces of his handiwork remain on mouldering panel or crumbling wall.