what does the “mason“ mean ？ Biff rested his elbows on the counter and looked at Blount with curiosity. 'Know what?' he asked. "Don't listen to him,' Blount said. 'Don't mind that flat-footed, blue-jowled, nosy bastard. For you see, when us people who know run into each other mat's an event. It almost never happens. Sometimes we meet each other and neither guesses that the other is one who knows. That's a bad thing. It's happened to me a lot of times. But you see there are so few of us.' 'Masons?' Biff asked.