V. As to wild beasts, fishes, and birds, it is to be observed that the sovereign of the respective lands, or waters where they are found, has a legal right to prohibit any one from taking them, and thereby acquiring a property in them. A prohibition extending to foreigners, as well as subjects. To foreigners; because by all the rules of moral law they owe obedience to the sovereign, for the time during which they reside in his territories. Nor is there any validity in the objection founded on the Roman Law, the Law of nature, or the Law of nations, which, it is said, declare such animals to be beasts of chace free to every one's hunting. For this is only true, where there is no civil law to interpose its prohibition; as the Roman law left many things in their primitive state, which by other nations were placed upon a very different footing. The deviations therefore from the state of nature, which have been established by the civil law, are ordained by every principle of natural justice to be obeyed by mankind. For although the civil law can enjoin nothing which the law of nature prohibits, nor prohibit any thing which it enjoins, yet it may circumscribe natural liberty, restraining what was before allowed; although the restraint should extend to the very acquisition of property, to which every man AT FIRST had a right by the law of nature. VI. The next thing to be considered is the right, which men have to the common use of things, already appropriated; terms, in which at the first sight there appears to be some inconsistency, as it appears that the establishment of property has absorbed every right that sprung from a state of things held in common. But this is by no means the case. For the intention of those, who first introduce private property, must be taken into the account. And it was but reasonable to suppose, that in making this introduction of property, they would depart as little as possible from the original principles of natural equity. For if written laws are to be construed in a sense, approaching as nearly as possible to the laws of nature, much more so are those customs which are not fettered with the literal restrictions of written maxims. From hence it follows that in cases of extreme necessity, the original right of using things, as if they had remained in common, must be revived; because in all human laws, and consequently in the laws relating to property, the case of extreme necessity seems to form an exception. Upon this principle is built the maxim that if in a voyage provisions begin to fail, the stock of every individual ought to be produced for common consumption; for the same reason a neighbouring house may be pulled down to stop the progress of a fire: or the cables or nets, in which a ship is entangled, may be cut, if it cannot otherwise be disengaged. Maxims, none of which were introduced by the civil law, but only explained by it according to the rules of natural equity.