I have not read the article you referenced (yet), but have read others on the subject that are in agreement. I also was reading a piece written for the Harvard Law Review (if memory serves). The author discounted "Law of Nations' by Vittal because: "It had not yet been translated" (from the original French) at the time of the writing of the Constitution. She ignored the fact that three copies were held by Founding Fathers (Madison, Jefferson and Franklin), two of whom were fluent in French (Not sure about Madison).
I didn't finish the article after I saw that.
That was my mistake. I said "Van Ark", I confused it with "Wong Kim Ark".
Van Ark was indeed Wisconsin. Wong Kim Ark was a SCOTUS case regarding a man born in San Francisco.