. . . "Pinkerton Detective agency" . . . . . . . . "Pinkerton Detective Agency" . "detective agency" . . . . . "1850" . "Pinkerton Detective" . "Pinkerton" . . . "Pinkerton (detective agency)" . "Pinkerton Agency" . . . . "Pinkerton detectives" . "Pinkerton's" . "Pinkerton detective" . "Pinkerton (detective agency)" . "Pinkertons" . . . . "Pinkerton detective agent" . "Pinkerton National Detective Agency" . . . . . . . "Pinkerton detective agency" . . . . "the Pinkertons" . . . . "Pinkerton agents" . . .