Thanks for the John Jay quote and associated citation.
Here’s one of the footnotes from that text:
7. Notation in margin: “Vat. 3 B. 7. Ch.” Emer de Vattel, The law of nations; or, Principles of the law of nature: applied to the conduct and affairs of nations and sovereigns. By M. de Vattel. A work tending to display the true interest of powers. Translated from the French (London: printed for J. Newbery, J. Richardson, S. Crowder, T. Caslon, T. Longman, B. Law, J. Fuller, J. Coote, and G. Kearsly, 1759), bk. 3, chap. 7, sec. 103, p. 36. Here and below JJ paraphrases or quotes with minor changes in punctuation or capitalization from this edition, his personal copy of which is now in the Columbia University Law Library.
This seems to show that, at least as of 1793, John Jay possessed a 1759 English translation of the original French of Vattel’s Law of Nations.
BTW, Emer de Vattel is cited up and down the length of the noted paper by Jay (an intellectual giant among U.S. founding fathers).
And Jay is the initiator of the "natural born citizen" requirement.