Start with my post #47.
I suggest that you research just why, in a subsequent act a few short years later, the word “natural” was removed. I believe you will find if you do that it was taken out because there was a good deal of opinion that it was not constitutional to attempt to alter the Article II phrase in a statute. Nor do I think that you will find authority that what the Framers meant can be defined in a subsequent statute rather than in what can be ascertained about what was meant by the phrase at the time that the Constitution was drafted.