Very interesting—had never seen or read that. Gives Vattel props vis-a-vis chaotic, Natural Law-mangling British subjectship law.
I think it is a very important piece of evidence. Firstly it proves there was no consensus that American Citizenship was derived from English Common law.
And it comes from the legal community of Philadelphia, which is exactly where the Constitutional convention was held. If anyone should know what was intended by "natural born citizen", it should be the Philadelphia legal community which participated in the event.