http://www.scribd.com/doc/17485112/The-Conclusive-Definition-of-Natural-Born-Citizen
http://thelibertypole.ning.com/forum/topics/the-definition-of-natural-born
http://volokh.com/posts/1204265246.shtml
With apologies to your ‘civics’ teachers and the modern lay dictionary, neither was a source at the time the Constitution was written.
Neither were blogs. Also the Constitution provides a ‘grandfather clause’ that no longer applies.
Legal precedence for starters...
Dred Scott v. Sandford,
Minor v. Happersett,
Perkins v. Elg
Schneider v. Rusk
United States v. Wong Kim Ark