As successive books appeared, I began to recognize more and more clearly another phase of an author’s experience. A writer gradually forms a constituency, certain qualities in his book appealing to certain classes of minds. In my own case, I do not mean classes of people looked at from the social point of view. A writer who takes any hold on popular attention inevitably learns the character of his constituency. He appeals, and minds and temperaments in sympathy respond. Those he cannot touch go on their way indifferently; those he offends may often strike back. This is the natural result of any strong assertion of individuality. Certainly, if I had my choice, I would rather write a book interesting to the young and to the common people, whom Lincoln said “God must love, since He made so many of them.” The former are open to influence; the latter can be quickened and prepared for something better. As a matter of fact, I find that there are those in all classes whom my books attract, others who are repelled, as I have said. It is perhaps one of the pleasantest experiences of an author’s life to learn from letters and in other ways that he is forming a circle of friends, none the less friendly because personally unknown. Their loyalty is both a safeguard and an inspiration. On one hand, the writer shrinks from abusing such regard by careless work; on the other, he is stimulated and encouraged by the feeling that there is a group in waiting who will appreciate his best endeavor. While I clearly recognize my limitations, and have no wish to emulate the frog in the fable, I can truthfully say that I take increasing pains with each story, aiming to verify every point by experience—my own or that