1. See Grotius on the Right of War and Peace, book ii. chap. 17. § 24.
2. O excellent and divine laws, enacted by our ancestors in the beginning of the Roman empire Let no man change his city against his will, nor let him be compelled to stay in it. These are the surest foundations of our liberty, that every one should have it in his power either to preserve or relinquish his right. Orat. pro L. Corn. Balb. cap. 13. adde Leg. 12. sect. 9. Digest. de cap. diminat. et postlim. lib. 49. tit. 15.
3. See Grotius, ubi supra, and Puffendorf of the Law of Nature and Nations, book viii. chap. xi. § 4.