It All Began with a Picture...
from Of Other Worlds, Ed. Walter Hooper, p. 42
The Editor has asked me to tell you how I came to write The Lion, The Witch and the Wardrobe. I will try, but you must not believe all that authors tell you about how they wrote their books. This is not because they mean to tell lies. It is because a man writing a story is too excited about the story itself to sit back and notice how he is doing it. In fact, that might stop the works; just as, if you start thinking about how you tie your tie, the next thing is that you find you can't tie it. And afterwards, when the story is finished, he has forgotten a good deal of what writing it was like.
One thing I am sure of. All my seven Narnian books, and my three science fiction books, began with seeing pictures in my head. At first they were not a story, just pictures. The Lion all began with a picture of a Faun carrying an umbrella and parcels in a snowy wood. This picture had been in my mind since I was about sixteen. Then one day, when I was about forty, I said to myself: 'Let's try to make a story about it.'
At first I had very little idea how the story would go. But then suddenly Aslan came bounding into it. I think I had been having a good many dreams of lions about that time. Apart from that, I don't know where the Lion came from or why He came. But once He was there He pulled the whole story together, and soon He pulled the six other Narnian stories in after Him.
So you see that, in a sense, I know very little about how this story was born. That is, I don't know where the pictures came from. And I don't believe anyone knows exactly how he 'makes things up'. Making up is a very mysterious thing. When you 'have an idea' could you tell anyone exactly how you thought of it?