The black gang

The First World War is over, but it seems that the hostilities are not. When Captain Hugh 'Bulldog' Drummond and his pals discover that foreigners are infiltrating all levels of English society - bribing, blackmailing, and undermining England's democratic tradition - their course is clear. The Black Gang is formed, bent on tracking down the perpetrators of such Bolshevik plots and rescuing their victims. Convinced that these subversive attacks are not isolated incidents, the Black Gang sets a trap to lure the criminal mastermind behind them to England. All is going according to plan until Bulldog Drummond accepts an invitation to tea at the Ritz with a charming American clergyman and his dowdy daughter...

Bulldog Drummond #2 "His four rounds with Carl Peterson"