"I do not mean that the novelist should write about his own business. I mean that he should write about the psychology that he understands. A man who spends years in the cloak-and-suit business is not, therefore, qualified to write novels about that business, even if he is qualified to write novels at all. "I had no real knowledge of the cloak-and-suit trade when I began to write about it. I made many technical blunders. For instance, I had Potash and Perlmutter buying goods by the gross instead of by the piece. And I received many indignant letters pointing out my mistake. "I had never been in the cloak-and-suit trade. But my work as a lawyer had brought me into contact with many people who were in that business, and I had intimate knowledge of the psychology of the Jew, his religion, his humor, his tragedy, his whole attitude toward life. "The trouble with many young writers," said Mr. Glass, "is that they don't know what they are writing about. They are attempting to describe psychological states of which they have only third-hand knowledge. Their ideas have no semblance of truth, and therefore their work is absolutely unconvincing." "At any rate," I said, "you will admit that American writers are more and more inclined to make the United States the scene of their stories. Do you think that O. Henry's influence is responsible for this?" "No," said Mr. Glass, "I do not think that this is due to O. Henry's influence. It was a natural development. You see, O. Henry's literary life lasted for only about four years, and while he has had many imitators, I do not think that he can be given credit for directing the attention of American writers to the life of their own country. "Probably William Dean Howells should be called the founder of the modern school of American fiction. He was the first writer to achieve distinguished success for tales of modern American life. There were several other authors who began to write about Americans soon after Mr. Howells began--Thomas Janvier, H. C. Bunner, and Brander Matthews were among them. "Kipling's popularity gave a great impetus to the writing of short stories of modern life. It is interesting to trace the course of the short story from Kipling to O. Henry. "Did you ever notice," asked Mr. Glass, "that the best stories on New York life are written by people who have been born and brought up outside of the city? The writer who has always lived in New York seems thereby to be disqualified from writing about it, just as the man in the cloak-and-suit trade is too close to his subject to reproduce it in fiction. The writer who comes to New York after spending his youth elsewhere gets the full romantic effect of New York; he gets a perspective on it which the native New-Yorker seldom attains. The viewpoint of the writer who has always lived in New York is subjective, whereas one must have the objective viewpoint to write about the city successfully.