I guess that you are not getting my point.
Whether the Founders took a strict interpretation from a single source - English Common Law, English Common Law, Grotius, Vattel, etc. OR some combination thereof is NOT relevant.
My point is that Calvin’s Case [which people point to as legitimacy for Obama as NBC] was WRONG ...
There was NO English statute that stated any child born in England was natural-born [save the exceptions previously noted]. And, I have provided proof of that vis-a-vis the passages from Parliament.
The Founders would have known that AND would have known that a man CANNOT serve two masters at the same time.
Consequently, due to the British Nationality Act of 1728, the Founders would have realized that a child born to a natural-born English subject COULD NEVER be considered NBC.
There was no need for them to have to convert the exclusive English law phrase for a natural born Subject when in fact there was a definition for natural born Citizen available to them in the very source they referred to when raising the country and creating the Constitution.