The explanatory commentaries have been carefully brought up to date, and a perhaps superfluously full Index should facilitate reference for those interested in matters of the kind.

Such persons may not be sorry to have their attention recalled to many questions which have demanded practical treatment of late years, more especially during the years of the great war.
Not a few of these questions are sure again to come to the front, so soon as the rehabilitation of International Law, rendered necessary by the conduct of that War, shall be seriously taken in hand.
T.E.H.
OXFORD, _April_ 25, 1921.
CONTENTS.