I don't have the book with me, so I can't give an exact quote, but methinks Chapter XIX "The Last Stage" may shed some light on whether Tolkien intended Providence to play a role in The Hobbit from the beginning. Check out the conversation between Gandalf and Bilbo that happens at the very end of the book. They're not exactly talking about Eru, but I think we can catch the drift.
__________________
"If you're referring to the incident with the dragon, I was barely involved. All I did was give your uncle a little nudge out of the door."
THE HOBBIT - IT'S COMING
|