3 APRIL 1920, Page 25

Diplomacy and the Study of International Relations. By D. P.

Heatley. (Clarendon Press. 7s. 6d. net.)—This instructive book contains two essays on "Diplomacy and the Conduct of Foreign Policy" and on "The Literature of International Relations." Mr. Heatley's historical sketch of diplomacy is illustrated with many suggestive quotations. He has no patience with those who idly complain of "secret diplomacy," and he points out that the nation must trust its Ministers when they are conducting difficult negotiations with foreign Powers. The essay on diplo- matic literature contains a great deal of matter in a sthall space, including a review of the various projects of perpetual peace, which, as the author says, are not encouraging. Mr. Heatley has collected in his appendices a number of extracts from old writers, and from modern British statesmen—such as Gladstone's view of the Treaty-making power in regard to Heligoland, and the opinions of various Foreign Secretaries on the advantages and disadvantages of publicity. Mr. Heatley's book is indeed a repertory of historical information that is not easily found elsewhere.