Sir,--The terminology of the law of nations has been enriched by a new phrase. We are all getting accustomed to "spheres of influence." We have been meditating for some time past upon the interpretation to be put upon "a lease of sovereign rights." But what is an international "usufruct"? The word has, of course, a perfectly ascertained sense in Roman law and its derivatives; but it has been hitherto employed, during, perhaps two thousand years, always as a term of private law--_i.e._ as descriptive of a right enjoyed by one private individual or corporation over the property of another. It is the "ius utendi fruendi, salva rerum substantia." The usufructuary of land not merely has the use of it, but may cut its forests and work its mines, so long as he does not destroy the character of the place as he received it. His interest terminates with his life, though it might also be granted to him for a shorter period. If the grantee be a corporation, in order to protect the outstanding right of the owner an artificial limit is imposed upon the tenure--e.g. in Roman law 100 years, by the French Code 30 years. For details it may suffice to refer to the Institutes of Justinian, II. 4; the Digest, VII. 1; the Code Civil, sects. 573-636; the new German Civil Code, sects. 1030-1089. It remains to be seen how the conception of "usufruct" is to be imported into the relations of sovereign States, and, more especially, what are to be the relations of the usufructuary to States other than the State under which he holds. It is, of course, quite possible to adapt the terms of Roman private law to international use. "Dominium," "Possessio," "Occupatio," have long been so adapted, but it has yet to be proved that "Usufructus" is equally malleable. I can recall no other use of the term in international discussions than the somewhat rhetorical statement that an invader should consider himself as merely the "usufructuary" of the resources of the country which he is invading; which is no more than to say that he should use them "en bon père de famille." It will be a very different matter to put a strict legal construction upon the grant of the "usufruct" of Port Arthur. By way of homage to the conception of such a grant, as presumably creating at the outside a life-interest, Russia seems to have taken it, in the first instance, only for twenty-five years. One may, however, be pardoned for sharing, with reference to this transaction, the scruples which were felt at Rome as to allowing the grant of a usufruct to a corporation--"periculum enim esse videbatur, ne perpetuus fieret." I am, Sir, your obedient servant, T. E. HOLLAND. Oxford, March 30 (1898). P.S.--It would seem from M. Lehr's _Éléments du droit civil Russe_ that "usufruct" is almost unknown to the law of Russia, though a restricted form of it figures in the code of the Baltic provinces.