In 1920, the India Office in Whitehall, London, compiled a comprehensive blacklist of foreigners to be barred from entering the subcontinent. Just two years after World War I and less than three years after the Bolsheviks seized power in Russia, the list was dominated by Russians, both suspected and confirmed communists. It also included Americans, Italians, Finns and Swedes, who were viewed as potential facilitators of the communist movement in India. On September 19, 1921, the Secretary of the Judicial and Public Department at the British Home Office sent a warning circular to both the Home Department and the Intelligence...