Lincoln speech on the Bible?

[RJNorton]

I have an older book entitled Lincoln and the Preachers by Edgar DeWitt Jones. The book does not have an index so it's a little difficult to find specific things. But the author does devote a half-chapter to Rev. Smith, and I cannot find anything about this alleged Lincoln Bible lecture. It's the sort of thing Jones would have included, IMO, if he had believed the story. I am still a skeptic on this topic.