25 JUNE 1921, Page 22

The Law of. Naval Warfare. By J. A. Hall. (Chapman

and Hall. 30e. net.)—Mr. Hall published the first edition of his useful book just -before the war. This new edition has thus had to be in great part rewritten. It is a welleplanned and compact survey of this branch of international law, with an appendix of documents such as the unhappy Declaration of London and various Orders in Council relating to contraband, the blockade, and so .forth. Mr. Hall contends that, although Germany defied and.repudiated international law in the late war because there was only one -powerful neutral, in. the next war there -will probably be several powerful neutrals who could insist on :a proper observance of :the rules of warfare. It is therefore desirable to have segeneral agreement. as to the nature of these rules and to secure ler the support of .public opinion. The study of international law is thust by no means obsolete.