IT is difficult to believe that the author of ' Erewhon ' and that masterpiece among novels, ' The Way of All Flesh,' needs more than the slightest introduction to our readers. Mr. MacCarthy deals with his work and literary influence in the penultimate talk of his series on modern literary classics. Any listener who is persuaded by him to tackle Samuel Butler for the first time, will owe Mr. MacCarthy a debt difficult adequately to discharge.