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Defence of India Act 1915
Hindu–German Conspiracy
Intelligence Bureau for the East
Tomáš Garrigue Masaryk
W. Somerset Maugham
Ashenden: Or the British AgentBritish counter-intelligence against the Indian revolutionary movement during World War IChristmas Day PlotDepartment of Criminal IntelligenceGhadar MutinyGuy GauntHerambalal GuptaIndian Political Intelligence OfficeIngress into India Ordinance, 1914John WallingerKirpal Singh (spy)Oren (spy)Vincent KraftW. C. Hopkinson