When I am writing a novel I must actually live the lives of my characters. If, for instance, my hero is a gambler on the French Riviera, I must make myself pack up and go to Cannes or Nice, willy-nilly, and there throw myself into the gay life of the gambling set until I really feel that I am Paul De Lacroix, or Ed Whelen, or whatever my hero's name is. Of course this runs into money, and I am quite likely to have to change my ideas about my hero entirely and make him a bum on a tramp steamer working his way back to America, or a young college boy out of funds who lives by his wits until his friends at home send him a hundred and ten dollars.