Is there a link to the Nat'l Geographic article? If not, can you give the date and article title? Thanks. I'd like to ping a few dozen folks who wonder why it's significant to nail down Lewis' intent.
http://news.nationalgeographic.com/news/2005/12/1209_051209_narnia_lewis.html
Here it is - I had to hunt for it.
It's not so much as they say it's not Christian, but they really downplay Christian influence. You'll see when you read it.