12 JANUARY 1918, Page 17

The Commonwealth at War. By A. F. Pollard. (Longmans and

Co. 6s. 6d. net.)—Professor Pollard has collected in this volume his scattered writings on the war, together with his lecture on " The Growth of an Imperial Parliament," which is an argument against formulating any Imperial Constitution that has not evolved slowly and naturally. The articles are dated, and thus reflect the opinions of a thoughtful historian at various stages of the war. Time alone will show how far the author was right in his hopeful view of the Russian Revolution, for example, or in other judgments expressed with force and precision. His article on " The Length of Wars " is interesting but non-committal ; he does not predict the length of this war, but he makes a good point in reminding us that the war would have ended before now but for the growth of medical science and the nursing art, and but for the increased efficiency of human production. " The war will be further pro- longed by the difficulty of making peace."