" 
 One more observation, Emerich Vattel's  ""Law of Nations"" appears to be the ONLY written work ACTUALLY referenced in the Constitution at  Article 1, Section 8  Powers of Congress    the  10th Sentence or paragraph.   It would seem that the Founders and writers of the Constitution's reverence for Vattel's work, would direct toward Vattel's definition of ""natural born citizen"" in Article 2 Section 1."