For this art of painting is a very simple thing indeed, according to Mr. Collier. It consists merely in the 'representation of natural objects by means of pigments on a flat surface.' There is nothing, he tells us, 'so very mysterious' in it after all. 'Every natural object appears to us as a sort of pattern of different shades and colours,' and 'the task of the artist is so to arrange his shades and colours on his canvas that a similar pattern is produced.' This is obviously pure common-sense, and it is clear that art-definitions of this character can be comprehended by the very meanest capacity and, indeed, may be said to appeal to it. For the perfect development, however, of this pattern-producing faculty a severe training is necessary. The art student must begin by painting china, crockery, and 'still life' generally. He should rule his straight lines and employ actual measurements wherever it is possible. He will also find that a plumb-line comes in very useful. Then he should proceed to Greek sculpture, for from pottery to Phidias is only one step. Ultimately he will arrive at the living model, and as soon as he can 'faithfully represent any object that he has before him' he is a painter. After this there is, of course, only one thing to be considered, the important question of subject. Subjects, Mr. Collier tells us, are of two kinds, ancient and modern. Modern subjects are more healthy than ancient subjects, but the real difficulty of modernity in art is that the artist passes his life with respectable people, and that respectable people are unpictorial. 'For picturesqueness,' consequently, he should go to 'the rural poor,' and for pathos to the London slums. Ancient subjects offer the artist a very much wider field. If he is fond of 'rich stuffs and costly accessories' he should study the Middle Ages; if he wishes to paint beautiful people, 'untrammelled by any considerations of historical accuracy,' he should turn to the Greek and Roman mythology; and if he is a 'mediocre painter,' he should choose his 'subject from the Old and New Testament,' a recommendation, by the way, that many of our Royal Academicians seem already to have carried out. To paint a real historical picture one requires the assistance of a theatrical costumier and a photographer. From the former one hires the dresses and the latter supplies one with the true background. Besides subject-pictures there are also portraits and landscapes. Portrait painting, Mr. Collier tells us, 'makes no demands on the imagination.' As is the sitter, so is the work of art. If the sitter be commonplace, for instance, it would be 'contrary to the fundamental principles of portraiture to make the picture other than commonplace.' There are, however, certain rules that should be followed. One of the most important of these is that the artist should always consult his sitter's relations before he begins the picture.