I beg to differ. He was certainly an influence but he did not convert C.S. Lewis.
You are correct. CS Lewis was let to the LORD by a combination of things and people. GK Chesterton and his writing were credited by Lewis as examples of those things. The friendship between Lewis and Tolkien are a little overblown, they were definitely friends. Tolkien did not like the mixing of different mythological characters e.g. Greek characters and North-Western European types in one setting, he was a bit of purest. Hence, he didn’t like Narnia that much.
Beg all you want— need some references? They are all at Oxford. C.S.Lewis was an atheist.
"The Most Reluctant Convert" by David Downing tells the story of Lewis' spiritual walk to the Christian Faith.
It was, indeed, Tolkein on Addison's Walk who sealed the deal.