Mr. Sisson, it will be remembered, was sent to Russia in October 1917 as President Wilson's representative to disseminate information in Russia and Germany regarding American aims and purposes, to bolster up the morale of the Russians and to undermine that of the Germans. When he arrived he found that the Kerensky régime had been overthrown and that the Bolsheviks were in power. Nevertheless he stayed in Russia for more than three months, keeping in close touch with developments and with the personalities in control of the situation. When one considers that these three months were the critical period of the establishment of Bolshevik rule, that they witnessed the abortive constituent assembly, the beginnings of the terror, and above all the crucial negotiations with the Germans that led to the Treaty of Brest-Litovsk, it will be unnecessary to enlarge upon the interest of Mr. Sisson's account. Whatever may be thought of the methods of American propaganda or of the opinions of Mr. Sisson himself, it cannot be denied that his detailed account of day-to-day developments is a valuable document on the history of the Bolshevik revolution.