I daresay you cannot come up with a single law defining "natural born citizen" from that time period.
If you understood what the founders meant when they referred to "natural law", you would know that making a law regarding "natural born citizen" is a contradiction in terms.
Well the Naturalization Act of 1790 said that "...children of citizens of the United States, that may be born across the sea, or outside the limits of the United States, shall be considered as natural born citizens." Is that defining natural-born citizen? Or is that just identifying those people as natural-born citizens?
If you understood what the founders meant when they referred to "natural law", you would know that making a law regarding "natural born citizen" is a contradiction in terms.
Except that the founders are dead, they didn't include their definition of natural-born citizen in the Constitution, so all we have is your opinion on what they meant.