The subject of treaties of guarantee has been discussed with great ability and exceptional knowledge by Sir Ernest Satow in a recent number of the Cambridge Historical Journal. It is, however, one of such historical interest and also of such immediate practical importance, that it may perhaps be permissible to offer some additional observations upon it, and I hope that the value of what I have to say will not be diminished by the fact that I shall be chiefly occupied with what may at first appear to be largely a question of language. After all, treaties are the legal instruments by which the relations between states are defined, and we know how much difficulty may arise, even in private affairs, from the incorrect wording of legal documents and from carelessness in the use of technical expressions.