Worship in Washington

[Steve]

How do we know Abraham Lincoln wasn't baptized at his father, Thomas's church? I know Thomas was a Baptist and didn't practice infant baptism, but Abraham stayed with his father until he was 21. Wouldn't that be the most obvious possibility?

Is there some account or document which specifically says that he wasn't baptized before he left his father's household? It would seem to be a more likely possibility than some "secret baptism" story.