 After the February revolution, he was active in helping exiled Russian revolutionaries to return to Russia - most notably Lenin, whom he supplied with money for the journey, and greeted when his party arrived in Sweden after crossing Germany in a 'sealed train' in April 1917.Lenin appointed him a member of the three man Stockholm bureau of the Bolshevik party, with Karl Radek and Vatslav Vorovsky.In July 1917, after an abortive Bolshevik-led attempt to overthrow Russia's provisional government, Lenin was accused by government supporters of being a paid German agent.