Dear Ruth . . . ,
Many thanks for your kind letter, and it was very good of you to write and tell me that you like my books; and what a very good letter you write for your age!
If you continue to love Jesus, nothing much can go wrong with you, and I hope you may always do so. I’m so thankful that you realized [the] “hidden story” in the Narnian books. It is odd, children nearly always do, grownups hardly ever.
I’m afraid the Narnian series has come to an end, and am sorry to tell you that you can expect no more.
God bless you.
C. S. Lewis
C.S. Lewis, Letters to Children (1985)