[Terriergal]

Lewis explained at some length his view on the question of origins. These letters reveal that during the last years of his life Lewis grew increasingly uncomfortable with the claims being made for organic evolution.

Not surprising, from a thinking person.

[Terriergal]

From CS Lewis at http://www.apologetics.org/acworthletters3.html

I have read nearly the whole of Evolution [probably Acworth's unpublished "The Lie of Evolution"] and am glad you sent it. I must confess it has shaken me: not in my belief in evolution, which was of the vaguest and most intermittent kind, but in my belief that the question was wholly unimportant. I wish I were younger. What inclines me now to think that you may be right in regarding it as the central and radical lie in the whole web of falsehood that now governs our lives is not so much your arguments against it as the fanatical and twisted attitudes of its defenders. The section on Anthropology was especially good? The point that the whole economy of nature demands simultaneity of at least a very great many species is a very sticky one. Thanks: and blessings.

After reading these letters it seems obvious to me he was at the end moving on to question evolution. It was just one of those things he hadn't seen as important until then.