Kennet's translation (1703) may be found in several editions.
Burlamaqui, Principes du droit naturel (1747).
Nugent's translation is convenient.
Wolff, Institutiones juris naturae et gentium (1750).
Rutherforth, Institutes of Natural Law (1754-1756).
Vattel, Le droit des gens, Préliminaires (1758).
There are many translations of Vattel.
Rousseau, Contrat social (1762).
Tozer's translation is convenient.
Blackstone, Commentaries on the Laws of England, Introduction, sect. II (1765).