In 1868 Messrs. Harper published in book form under the title _Social Pictorial Satire_ a series of articles which du Maurier had written in _Harper's Magazine_, and which had originally formed the substance of lectures which he had delivered in the prominent towns of England. He speaks first of his great admiration of Leech in his youth. "To be an apparently hopeless invalid at Christmas-time in some dreary, deserted, dismal little Flemish town, and to receive _Punch's Almanac_ (for 1858, let us say) from some good-natured friend in England--that is a thing not to be forgotten! I little dreamed that I should come to London again, and meet John Leech and become his friend; that I should be, alas! the last man to shake hands with him before his death (as I believe I was), and find myself among the officially invited mourners by his grave; and, finally, that I should inherit, and fill for so many years (however indifferently), that half-page in _Punch_ opposite the political cartoon, and which I had loved so well when he was the artist!" Du Maurier draws a pleasant portrait of his friend, sympathetically, and very picturesquely analyses his art, which has, he says, the quality of inevitableness. Of "Words set to Pictures" his long description of Leech's pretty woman is as good as anything that can be read of the kind. Then he sketches the characteristics of Charles Keene's personality and passes on to his art:--"From the pencil of this most lovable man, with his unrivalled power of expressing all he saw and thought, I cannot recall many lovable characters of either sex or of any age." But the tribute to the craftsmanship, the skill, the ease and beauty of Keene's line, to his knowledge of effect, to the very great artist is unmeasured. In fulfilment of his contract du Maurier speaks of himself and his "little bit of paper, a steel pen, and a bottle of ink--and, alas! fingers and an eye less skilled than they would have been if I had gone straight to a school of art instead of a laboratory for chemistry!" He says very little about himself. He concludes with a review of social pictorial satire considered as a fine art. It is evident from the lecture that du Maurier was an illustrator by instinct as well as training. "Now conceive," says he, speaking of Thackeray, "that the marvellous gift of expression that he was to possess in words had been changed by some fairy at his birth into an equal gift of expression by means of the pencil, and that he had cultivated the gift as assiduously as he cultivated the other, and, finally, that he had exercised it as seriously through life, bestowing on innumerable little pictures in black and white all the art and wisdom, the wide culture, the deep knowledge of the world and of the human heart, all the satire, the tenderness, the drollery, and last, but not least, that incomparable perfection of style that we find in all or most that he has written--what a pictorial record that would be!"