Note 18 — Chapter II · The General Rights of Things.

The words of Judge Blackstone will elucidate the meaning of Grotius in this place. The learned Commentator says, "There are some few things, which, notwithstanding the general introduction and continuance of property, must still unavoidably remain in common; being such wherein nothing but an usufructuary property is capable of being had: and therefore they still belong to the first occupant, during the time he holds possession of them, and no longer. Such (among others) are the elements of light, air, and water; which a man may occupy by means of his windows, his gardens, his mills, and other conveniences: such also are the generality of those animals which are said to be ferae naturae, or of a wild and untameable disposition: which any man may seise upon and keep for his own use or pleasure. All these things, so long as they remain in possession, every man has a right to enjoy without disturbance; but if once they escape from his custody, or he voluntarily abandons the use of them, they return to the common stock, and any man else has a right to seise and enjoy them afterwards."