Black Hand noun a secret criminal organisation composed of first-generation Italian immigrants to the US US,1898
The Mafia and the dread Black Hand are the same thing. The black hand was the sign over which the Mafia’s threats were delivered. — Jack Lait and Lee Mortimer, WashingtonConfidential, p. 180, 1951
The Black Hand? You think you can laugh it off? — Mickey Spillane, Kiss MeDeadly, p. 38, 1952